US20080272756A1 - Power factor correction controller with digital fir filter output voltage sampling - Google Patents
Power factor correction controller with digital fir filter output voltage sampling Download PDFInfo
- Publication number
- US20080272756A1 US20080272756A1 US11/967,276 US96727607A US2008272756A1 US 20080272756 A1 US20080272756 A1 US 20080272756A1 US 96727607 A US96727607 A US 96727607A US 2008272756 A1 US2008272756 A1 US 2008272756A1
- Authority
- US
- United States
- Prior art keywords
- output voltage
- frequency
- fir filter
- power converter
- switching power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/30—Delta-sigma modulation
- H03M3/458—Analogue/digital converters using delta-sigma modulation as an intermediate step
- H03M3/476—Non-linear conversion systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Definitions
- the present invention relates in general to the field of signal processing, and more specifically, to a power factor correction controller with a digital finite impulse response filter for output voltage sampling.
- FIG. 1 depicts a power control system 100 , which includes a switching power converter 102 .
- the switching power converter 102 performs power factor correction and provides constant voltage power to load 112 .
- Voltage source 101 supplies an alternating current (AC) input voltage V in (t) to a full, diode bridge rectifier 103 .
- the voltage source 101 is, for example, a public utility, and the AC voltage V in (t) is, for example, a 60 Hz/110 V line voltage in the United States of America or a 50 Hz/220 V line voltage in Europe.
- the rectifier 103 rectifies the input voltage V in (t) and supplies a rectified, time-varying, line input voltage V x (t) to the switching power converter.
- the switching power converter 102 includes power factor correction (PFC) stage 124 and driver stage 126 .
- the PFC stage 124 is controlled by switch 108 and provides power factor correction.
- the driver stage 126 is also controlled by switch 108 and regulates the transfer of energy from the line input voltage V x (t) through inductor 110 to capacitor 106 .
- the inductor current i L ramps ‘up’ when the switch 108 conducts, i.e. is “ON”.
- the inductor current i L ramps down when switch 108 is nonconductive, i.e. is “OFF”, and supplies current i L to recharge capacitor 106 .
- the time period during which inductor current i L ramps down is commonly referred to as the “inductor flyback time”.
- the switching power converter 102 operates in discontinuous current mode, i.e. the inductor current i L ramp up time plus the inductor flyback time is less than the period of switch 108 .
- Capacitor 106 supplies stored energy to load 112 while the switch 108 conducts.
- the capacitor 106 is sufficiently large so as to maintain a substantially constant output voltage V c (t), as established by a power factor correction (PFC) and output voltage controller 114 (as discussed in more detail below).
- the output voltage V c (t) remains substantially constant during constant load conditions. However, as load conditions change, the output voltage V c (t) changes.
- the PFC and output voltage controller 114 responds to the changes in V c (t) and adjusts the control signal CS 0 to maintain a substantially constant output voltage as quickly as possible.
- the output voltage controller 114 includes a small capacitor 115 to filter any high frequency signals from the line input voltage V x (t).
- the power control system 100 also includes a PFC and output voltage controller 114 to control the switch 108 and, thus, control power factor correction and regulate output power of the switching power converter 102 .
- the goal of power factor correction technology is to make the switching power converter 102 appear resistive to the voltage source 101 .
- the PFC and output voltage controller 114 attempts to control the inductor current i L so that the average inductor current i L is linearly and directly related to the line input voltage V x (t). Prodi ⁇ , Compensator Design and Stability Assessment for Fast Voltage Loops of Power Factor Correction Rectifiers , IEEE Transactions on Power Electronics, Vol. 22, No. 5, September 2007, pp.
- PFC and output voltage controller 114 supplies a pulse width modified (PWM) control signal CS 0 to control the conductivity of switch 108 .
- PWM pulse width modified
- switch 108 is a field effect transistor (FET)
- control signal CS 0 is the gate voltage of switch 108 .
- the values of the pulse width and duty cycle of control signal CS o depend on two feedback signals, namely, the line input voltage V x (t) and the capacitor voltage/output voltage V c (t).
- PFC and Output Voltage Controller 114 receives two feedback signals, the line input voltage V x (t) and the output voltage V c (t), via a wide bandwidth current loop 116 and a slower voltage loop 118 .
- the line input voltage V x (t) is sensed from node 120 between the diode rectifier and inductor 110 .
- the output voltage V c (t) is sensed from node 122 between diode 111 and load 112 .
- the current loop 116 operates at a frequency f c that is sufficient to allow the PFC and output controller 114 to respond to changes in the line input voltage V x (t) and cause the inductor current i L to track the line input voltage to provide power factor correction.
- the current loop frequency is generally set to a value between 20 kHz and 150 kHz.
- the voltage loop 118 operates at a much slower frequency f v , typically 10-20 Hz.
- the capacitor voltage V c (t) includes an alternating current component (sometimes referred to herein as a “ripple”) having a frequency equal to twice the frequency of input voltage V in (t), e.g. 120 Hz.
- the voltage loop 118 functions as a low pass filter to filter the ripple component.
- FIG. 2 depicts an output voltage V c (t) versus time graph 200 .
- the output voltage V c (t) supplied by power control system 100 includes a direct current (DC) component, i.e. the V c (t) DC offset, and an alternating current (AC) component, i.e. ripple 202 .
- the V c (t) DC offset can change over time due to input power fluctuations and load power demand fluctuations.
- the PFC and output voltage controller 114 monitors the output voltage V c (t) and adjusts the control signal CS 0 to return the output voltage V c (t) to the desired value.
- the ripple 202 can adversely influence the determination of the control signal CS 0 by PFC and output voltage controller 114 .
- the voltage loop 118 operates at a much slower frequency f v , typically 10-20 Hz, than the line frequency f L .
- the voltage loop 118 functions as a low pass filter to filter out ripple 202 .
- operating at 10-20 Hz also slows the response of PFC and output voltage controller 114 to changes in the output voltage V c (t).
- FIG. 3 depicts a generalized representation of a power control system 300 described in Prodic.
- the PFC and output voltage controller 302 of Prodic includes an error generator 304 to determine an error signal e d (t).
- the error signal e d (t) represents a difference between the output voltage V c (t) and a reference voltage V REF .
- the reference voltage V REF is set to the desired value of output voltage V c (t).
- a comb filter 306 filters the error signal e d (t).
- the comb filter 306 has significant attenuation at equally spaced frequencies (referred to as “notches”) and has unity gain at other frequencies.
- the comb filter 306 automatically tunes the notches to match twice the line frequency f L and harmonics of the line frequency.
- the comb filter 306 generates a “ripple free” error signal e vf (t).
- Compensator 308 processes the filtered error signal, and input voltage feedback signal V x (t) generates a compensator output signal.
- the pulse width modulator (PWM) 310 processes the compensator output signal to generate control signal CS 0a.
- an apparatus in one embodiment, includes a FIR filter to generate discrete samples of an output voltage feedback signal associated with an output voltage of a switching power converter.
- the FIR filter is configured to generate the discrete samples at a sampling frequency f s , the sampling frequency f s is approximately an integer multiple of a line frequency f L , and the line frequency f L is a frequency of a line input voltage supplied to the switching power converter.
- the apparatus also includes a switch state controller, coupled to the FIR filter.
- the switch state controller is configured to receive a signal associated with the discrete samples generated by the FIR filter and use the received signal to generate a control signal to provide power factor correction and to regulate the output voltage of the switching power converter.
- the switch state controller is further configured to provide the control signal to the switching power converter.
- a method of regulating an output voltage of a switching power converter includes generating discrete samples of an output voltage feedback signal associated with an output voltage of a switching power converter using a FIR filter.
- the FIR filter is configured to generate the discrete samples at a sampling frequency f s , the sampling frequency f s is approximately an integer multiple of a line frequency f L , and the line frequency f L is a frequency of a line input voltage supplied to the switching power converter.
- the method further includes receiving a signal associated with the discrete samples generated by the FIR filter and using the received signal to generate a control signal to provide power factor correction and to regulate the output voltage of the switching power converter.
- the method also includes providing the control signal to the switching power converter.
- an apparatus for regulating an output voltage of a switching power converter includes a FIR filter to generate discrete samples of an output voltage feedback signal associated with an output voltage of a switching power converter.
- the FIR filter is configured to generate the discrete samples at a sampling frequency f s , the sampling frequency f s is approximately an integer multiple of a line frequency f L , and the line frequency f L is a frequency of a line input voltage supplied to the switching power converter.
- the apparatus also includes means for receiving a signal associated with the discrete samples generated by the FIR filter and means for using the received signal to generate a control signal to provide power factor correction and to regulate the output voltage of the switching power converter.
- the apparatus further includes means for providing the control signal to the switching power converter.
- FIG. 1 (labeled prior art) depicts a power control system.
- FIG. 2 (labeled prior art) depicts a power control system output voltage with an alternating current ripple component versus time graph.
- FIG. 3 (labeled prior art) depicts a power and control system with an output voltage feedback filter.
- FIG. 4A depicts a power control system that includes a sampling module with a digital finite impulse response (FIR) filter.
- FIR digital finite impulse response
- FIG. 4B depicts a graph of a boxcar FIR filter frequency response.
- FIGS. 5 and 6 depict respective embodiments of the power control system of FIG. 4A .
- FIG. 7 depicts a power control system that includes a sampling module with a digital FIR filter and a single feedback path.
- a power control system includes a digital FIR filter in an output voltage feedback loop of a switching power converter.
- a feedback loop provides an output voltage signal of the switching power converter to a PFC and output voltage controller.
- the output voltage signal includes direct current (DC) and alternating current (AC) components.
- the FIR filter provides discrete samples of an output voltage feedback signal to a switch state controller that allows the switch state controller to generate a control signal that reflects a relatively fast response to changes in the output voltage signal while reducing an influence of the AC component on the control signal.
- the FIR filter is configured to generate the discrete samples at a sampling frequency f s , the sampling frequency f s is approximately an integer multiple of a line frequency f L , and the line frequency f L is a frequency of a line input voltage supplied by a voltage source to the switching power converter.
- the sampling frequency f s is an integer multiple greater than or equal to twice the line frequency f L
- the FIR filter is a boxcar filter with a number of taps equal to f s /(2 ⁇ f L ) and coefficients all equal to (2 ⁇ f L )/f s .
- the boxcar filter has sampling frequency f s relationship to the line frequency f L and tap numbers as depicted in Table 1:
- the boxcar FIR filter provides attenuation (“notches”) at the ripple frequency and harmonics thereof.
- the boxcar FIR filter is convolved with itself, yielding a triangular FIR filter that provides even more attenuation at the ripple frequency and harmonics thereof.
- Increasing the number of taps of the FIR filter can reduce errors in the output samples of the FIR filter.
- the particular implementation of the taps is a matter of design choice.
- the taps are implemented in a serial chain of sample and hold circuits, such as one D flip-flop per tap, together with coefficient multipliers (not shown) for each tap and a summation circuit connected to the output of each coefficient multiplier.
- the FIR filter is implemented in software executed by a processor of, for example, PFC and output voltage controller 404 ( FIG. 4A ).
- the PFC and output voltage controller 404 responds to changes in the output voltage of the switching power converter at a frequency greater than or equal to the line frequency f L up to and including the sampling frequency.
- the output voltage feedback signal is a direct sampled version of the switching power converter output voltage.
- the output voltage feedback signal is an error signal determined from a difference between samples of the output voltage of the switching power converter and a reference signal.
- the reference signal represents a desired output voltage of the switching power converter.
- the desired output voltage of the power control system is a design choice and depends on the voltage output demand of an intended load or loads. For example, light emitting diode fixtures can have an output voltage demand of 400 V.
- FIG. 4A depicts one embodiment of a power control system 400 that includes switching power converter 402 and a PFC and output voltage controller 404 .
- the PFC and output voltage controller 404 includes a sampling module 408 , and the sampling module 408 includes a digital FIR filter 412 .
- the sampling module 408 allows the PFC and output voltage controller 404 to respond to changes in the output voltage signal V c (t) of switching power converter 402 at a frequency greater than or equal to approximately the line frequency f L up to approximately a sampling frequency f s while reducing an influence of the AC “ripple” component of the output voltage V c (t).
- the PFC and output voltage controller 302 is programmable as illustratively described in U.S. patent application entitled “Programmable Power Control System”, inventor John L. Melanson, assignee Cirrus Logic, Inc., and attorney docket number 1759-CA, which is incorporated herein by reference in its entirety.
- the switching power converter 402 includes a power factor correction (PFC) stage 409 to provide power factor correction.
- the switching power converter 402 also includes a driver stage 410 to provide a regulated output voltage V c (t) to load 112 .
- PFC stage 409 and driver stage 410 are identical to respective PFC stage 124 and driver stage 126 .
- the PFC and output voltage controller 404 receives output voltage V c (t) via feedback loop 412 .
- the output voltage V c (t) is received from node 122 at an input terminal of PFC and output voltage controller 404 .
- the digital FIR filter 412 filters an output voltage feedback signal.
- the output voltage feedback signal is the output voltage V c (t)
- the sampled output voltage feedback signal represents the DC offset of the output voltage V c (t).
- the output voltage feedback signal is an error signal, and the sampled output voltage feedback signal is directly and linearly related to the DC offset of the output voltage V c (t).
- the output voltage feedback signal includes ripple 202 .
- the FIR filter 412 samples and processes the output voltage feedback signal and through significant attenuation at the ripple frequency f R and harmonics thereof effectively eliminates the frequency components of ripple 202 from the output voltage feedback signal.
- the PFC and controller module 406 can reduce the influence of ripple 202 on the determination of a control signal CS 1 .
- the input signal to the PFC and controller module 406 is sampled at a sampling frequency f s , and, in at least one embodiment, the sampling frequency f s is equal to the line frequency f L or greater.
- the PFC and controller module 406 can update the control signal CS 1 at the sampling frequency f s and respond to changes in the output voltage V c (t) at the sampling frequency f s .
- Frequency f D represents an output frequency for sampling module 408 of discrete samples of the sampling module output signal V CF (n) provided to PFC and controller module 406 .
- the sampling frequency f s is greater than the sampling output frequency f D of discrete samples provided to PFC and controller module 406 .
- increasing the sampling frequency f s can reduce an error between the DC offset of the sampled output voltage feedback signal and the actual DC offset of output voltage V c (t).
- the response time of control signal CS 1 to changes in the output voltage V c (t) decreases.
- the sampling output frequency f D and the corresponding response time of control signal CS 1 are design choices.
- the sampling output frequency f D and the response time of control signal CS 1 are chosen to track the output voltage V c (t) as accurately as possible without damaging or unnecessarily reducing the life expectancy of components of the power control system 400 and without producing oscillations of the output voltage V c (t).
- the ripple 202 is generally periodic in time.
- sampling the output voltage feedback signal at the line frequency f L or integer multiples thereof has the effect in the time domain of sampling the ripple 202 at the same time(s) during each period of the ripple 202 .
- the sampled output voltage feedback signal represents a DC offset voltage of output voltage V c (t), thus removing the ripple 202 from a feedback signal provided to PFC and controller module 406 .
- the FIR filter 412 is a notch filter with significant attenuation at the sampling frequency f s and harmonics of the sampling frequency f s .
- the particular topology of FIR filter 412 is a matter of design choice.
- the FIR filter 412 is a boxcar filter designed to provide notches at the ripple frequency f R and harmonics thereof.
- the FIR filter 412 is a boxcar filter convolved with itself, yielding a triangular FIR filter, that provides even more attenuation at the ripple frequency f R and harmonics thereof.
- FIG. 4B depicts a boxcar filter frequency response 450 with notches 452 , 454 , 456 , and 458 at respective frequencies 120 Hz, 240 Hz, 360 Hz, 480 Hz, and subsequent harmonic frequencies.
- the boxcar filter has a sinc function and, thus, provides increasing average attenuation between notches.
- the line frequency f L 60 Hz
- the ripple frequency f R 120 Hz
- the sampling frequency f s 60 Hz.
- the number of taps equals 1
- the coefficient equals one.
- the line frequency f L 60 Hz
- the ripple frequency f R 120 Hz
- the sampling frequency f s 120 Hz.
- the number of taps equals 1 or 2
- the coefficients 1 or 1 ⁇ 2.
- the line frequency f L 60 Hz
- the ripple frequency f R 120 Hz
- the sampling frequency f s 240 Hz.
- the number of taps equals 1, 2, or 4
- the coefficients respectively equal 1, 1 ⁇ 2, or 1 ⁇ 4.
- the ripple 202 can still adversely influence determination of the control signal CS 1 because of, for example, DC offset errors in the determination of the output voltage V c (t) from the discrete samples of FIR filter 412 .
- the FIR filter 412 samples the output voltage feedback signal once during each period of ripple 202 and if ripple 202 is sampled at a time that does not exactly coincide with the beginning, mid-point, or end of the period (i.e. at the zero crossings relative to the actual DC offset of output voltage V c (t)), the samples will reflect an additional DC offset equal to a difference between the DC offset of the sample and the actual DC offset of output voltage V c (t).
- increasing the number of taps of FIR filter 412 decreases a DC offset error between discrete sample output data of FIR filter 412 and the filtered output voltage feedback signal. Additionally, increasing the number of taps smoothes transitions in the output data of FIR filter 412 as the output voltage V c (t) changes.
- the FIR filter 412 has notches at 120 Hz, 240 Hz, 360 Hz, and so on.
- the sampling frequency f s equals 960 Hz, i.e. (8)(2)(60)
- each tap coefficient is 1 ⁇ 8.
- the 8-tap FIR filter 412 removes the ripple frequency f R and harmonics thereof.
- Sampling module 408 generates a discrete sampling module output signal V CF (n) at a sampling output frequency f D .
- the sampling output frequency f D is a matter of design choice.
- each sample of output signal V CF (n) of the sampling module 408 is an output of the FIR filter 412 .
- the output signal V CF (n) represents a moving average of the output voltage feedback signal by continuously moving samples of the output voltage feedback signal through FIR filter 412 .
- the sampling output frequency f D equals the sampling frequency f s .
- the FIR filter 412 processes f s /f L samples, generates an output sample of output signal V CF (n), and discards (i.e. flushes) one or more of the state variables of FIR filter 412 before proceeding to generate the next output sample V CF (n+1). If all of the state variables are discarded, the sampling output frequency f D equals the line frequency f L . Thus, by selectively discarding or keeping one or more of the state variables of FIR filter 412 , the sampling output frequency f D can be the line frequency f L , the sampling frequency f s , or a frequency in between.
- the PFC and output voltage controller 404 also receives signal V S (t) from switching power converter 402 via feedback loop 414 .
- the feedback signal V S (t) senses the rectified line input voltage V x (t) at the input node 120 .
- the feedback signal V S (t) represents a voltage at the switch node 412 .
- the PFC and output voltage controller 404 can determine the line input voltage V x (t), the output voltage V c (t), or both from the voltage at the switch node 410 as, for example, described in the U.S. patent application entitled “Power Factor Correction Controller With Feedback Reduction”, inventor John L.
- Melanson assignee Cirrus Logic, Inc., and attorney docket number 1756-CA (“Melanson I”) and as, for example described in the U.S. patent application entitled “Power Factor Correction Controller With Switch Node Feedback”, inventor John L. Melanson, assignee Cirrus Logic, Inc., and attorney docket number 1757-CA (“Melanson II”). Melanson I and Melanson II are incorporated herein by reference in their entireties.
- the PFC and controller module 406 processes the feedback signal V S (t) and the input signal V CF (n) in accordance with the PFC and output voltage controllers described in Melanson I and Melanson II, with the input signal V CF (n) representing the output voltage V c (t) in Melanson I and Melanson II.
- PFC and controller module 406 processes feedback signal V S (t) and the input signal V CF (n) using the current and voltage compensators and pulse width modulator as described in Prodi ⁇ .
- the PFC and output voltage controller 404 can be implemented using discrete components, as one or more integrated circuits, or as a combination of discrete components and one or more integrated circuits. When implemented as one or more integrated circuits, the feedback signals V S (t) and output voltage V c (t) can be scaled to an input voltage useable by PFC and output voltage controller 404 . Exemplary sensor converters, such as voltage dividers and current sources described in Melanson I and Melanson II, can be used to scale the feedback signals V S (t) and output voltage V c (t).
- FIG. 5 depicts a power control system 500 , which is one embodiment of power control system 400 .
- the sampling module 502 represents one embodiment of sampling module 408 .
- the output voltage V c (t) of switching power converter 404 is fed back directly to FIR filter 412 .
- the output voltage V c (t) represents the output voltage feedback signal referenced in conjunction with power control system 400 ( FIG. 4A ).
- FIR filter generates sampling module output signal V CF (n).
- An error generator 304 determines a difference between the output signal V F (n) and a reference voltage V REF by, for example, subtracting the output signal V F (n) from the reference voltage V REF .
- the reference voltage V REF is set to the desired value of output voltage V c (t).
- the sampling module output signal V CF (n) represents an estimated error between the output voltage V c (t) and the desired voltage value V REF .
- difficulties may arise in producing a sampling frequency f s that is an exact integer multiple of the line frequency f L .
- the tap coefficients are all 1/95. Multiplying each sample in the FIR filter 412 by 1/95 can be a costly calculation in terms of time and implementation.
- FIG. 6 depicts a power control system 600 , which is one embodiment of power control system 400 .
- the sampling module 602 represents one embodiment of sampling module 408 .
- the output voltage V c (t) of switching power converter 404 is fed back directly to error generator 304 .
- Error generator 304 determines a difference signal e d (t) between the output voltage signal V c (t) and a reference voltage V REF by, for example, subtracting the output voltage signal V c (t) from the reference voltage V REF .
- the difference signal e d (t) represents the output voltage feedback signal referenced in conjunction with power control system 400 ( FIG. 4A ).
- the FIR filter 412 filters the difference signal e d (t) and generates sampling module output signal V CF (n).
- the gain factor 1/(number of taps) e.g. 1/95
- the gain factor in sampling module 602 since the output signal V CF (n) is only a feedback error value.
- a less costly multiplication by, for example, 1/96, for a 95 tap FIR filter 412 can be used with a negligible, if any, resulting performance loss.
- an approximately 20% or less deviation in the gain factors from the ideal gain factor, i.e. 1/(number of taps) is acceptable.
- the sampling module output signal V CF (n) also represents an estimated error between the output voltage V c (t) and the desired voltage value V REF .
- FIG. 7 depicts a power control system 700 .
- Power control system 700 is identical to power control system 400 except that the output voltage signal V c (t) and the input voltage V x (t) is determined from the feedback signal V S (t).
- the feedback signal V S (t) in the embodiment of FIG. 7 , represents a voltage at the switch node 412 .
- the input voltage V x (t) and output voltage V c (t) are determined from the feedback signal V S (t) by PFC and output voltage controller 702 as described in Melanson I and Melanson II.
- power control systems include a digital FIR filter.
- the FIR filter provides discrete samples of an output voltage feedback signal to a switch state controller that allows the switch state controller to generate a control signal that reflects a relatively quick response to changes in the output voltage signal while reducing an influence of the AC “ripple” component.
Abstract
A power control system includes a digital FIR filter in an output voltage feedback loop of a switching power converter. A feedback loop includes an output voltage signal of the switching power converter. The output voltage signal includes direct current (DC) and alternating current (AC) components. The FIR filter provides discrete samples of an output voltage feedback signal to a switch state controller that allows the switch state controller to generate a control signal that reflects a relatively quick response to changes in the output voltage signal while reducing an influence of the AC component. In at least one embodiment, the FIR filter is configured to generate the discrete samples at a sampling frequency fs, the sampling frequency fs is approximately an integer multiple of a line frequency fL, and the line frequency fL is a frequency of a line input voltage supplied to the switching power converter.
Description
- This application claims the benefit under 35 U.S.C. § 119(e) and 37 C.F.R. § 1.78 of U.S. Provisional Application No. 60/915,547, filed May 2, 2007, and entitled “Power Factor Correction (PFC) Controller Apparatuses and Methods,” and is incorporated by reference in its entirety.
- 1. Field of the Invention
- The present invention relates in general to the field of signal processing, and more specifically, to a power factor correction controller with a digital finite impulse response filter for output voltage sampling.
- 2. Description of the Related Art
- Power control systems provide power factor corrected and regulated output voltages to many devices that utilize a regulated output voltage.
FIG. 1 depicts apower control system 100, which includes aswitching power converter 102. Theswitching power converter 102 performs power factor correction and provides constant voltage power to load 112.Voltage source 101 supplies an alternating current (AC) input voltage Vin(t) to a full,diode bridge rectifier 103. Thevoltage source 101 is, for example, a public utility, and the AC voltage Vin(t) is, for example, a 60 Hz/110 V line voltage in the United States of America or a 50 Hz/220 V line voltage in Europe. Therectifier 103 rectifies the input voltage Vin(t) and supplies a rectified, time-varying, line input voltage Vx(t) to the switching power converter. - The
switching power converter 102 includes power factor correction (PFC)stage 124 anddriver stage 126. ThePFC stage 124 is controlled byswitch 108 and provides power factor correction. Thedriver stage 126 is also controlled byswitch 108 and regulates the transfer of energy from the line input voltage Vx(t) throughinductor 110 tocapacitor 106. The inductor current iL ramps ‘up’ when theswitch 108 conducts, i.e. is “ON”. The inductor current iL ramps down whenswitch 108 is nonconductive, i.e. is “OFF”, and supplies current iL to rechargecapacitor 106. The time period during which inductor current iL ramps down is commonly referred to as the “inductor flyback time”. In at least one embodiment, theswitching power converter 102 operates in discontinuous current mode, i.e. the inductor current iL ramp up time plus the inductor flyback time is less than the period ofswitch 108. - Capacitor 106 supplies stored energy to load 112 while the
switch 108 conducts. Thecapacitor 106 is sufficiently large so as to maintain a substantially constant output voltage Vc(t), as established by a power factor correction (PFC) and output voltage controller 114 (as discussed in more detail below). The output voltage Vc(t) remains substantially constant during constant load conditions. However, as load conditions change, the output voltage Vc(t) changes. The PFC andoutput voltage controller 114 responds to the changes in Vc(t) and adjusts the control signal CS0 to maintain a substantially constant output voltage as quickly as possible. Theoutput voltage controller 114 includes asmall capacitor 115 to filter any high frequency signals from the line input voltage Vx(t). - The
power control system 100 also includes a PFC andoutput voltage controller 114 to control theswitch 108 and, thus, control power factor correction and regulate output power of theswitching power converter 102. The goal of power factor correction technology is to make theswitching power converter 102 appear resistive to thevoltage source 101. Thus, the PFC andoutput voltage controller 114 attempts to control the inductor current iL so that the average inductor current iL is linearly and directly related to the line input voltage Vx(t). Prodić, Compensator Design and Stability Assessment for Fast Voltage Loops of Power Factor Correction Rectifiers, IEEE Transactions on Power Electronics, Vol. 22, No. 5, September 2007, pp. 1719-1729 (referred to herein as “Prodić”), describes an example of PFC andoutput voltage controller 114. The PFC andoutput voltage controller 114 supplies a pulse width modified (PWM) control signal CS0 to control the conductivity ofswitch 108. In at least one embodiment,switch 108 is a field effect transistor (FET), and control signal CS0 is the gate voltage ofswitch 108. The values of the pulse width and duty cycle of control signal CSo depend on two feedback signals, namely, the line input voltage Vx(t) and the capacitor voltage/output voltage Vc(t). - PFC and
Output Voltage Controller 114 receives two feedback signals, the line input voltage Vx(t) and the output voltage Vc(t), via a widebandwidth current loop 116 and aslower voltage loop 118. The line input voltage Vx(t) is sensed fromnode 120 between the diode rectifier andinductor 110. The output voltage Vc(t) is sensed fromnode 122 betweendiode 111 andload 112. Thecurrent loop 116 operates at a frequency fc that is sufficient to allow the PFC andoutput controller 114 to respond to changes in the line input voltage Vx(t) and cause the inductor current iL to track the line input voltage to provide power factor correction. The current loop frequency is generally set to a value between 20 kHz and 150 kHz. Thevoltage loop 118 operates at a much slower frequency fv, typically 10-20 Hz. As subsequently described in more detail, the capacitor voltage Vc(t) includes an alternating current component (sometimes referred to herein as a “ripple”) having a frequency equal to twice the frequency of input voltage Vin(t), e.g. 120 Hz. Thus, by operating at 10-20 Hz, thevoltage loop 118 functions as a low pass filter to filter the ripple component. -
FIG. 2 depicts an output voltage Vc(t) versustime graph 200. Referring toFIGS. 1 and 2 , the output voltage Vc(t) supplied bypower control system 100 includes a direct current (DC) component, i.e. the Vc(t) DC offset, and an alternating current (AC) component,i.e. ripple 202. The frequency fR of theripple 202 is twice the line frequency fL of input voltage Vin(t). For example, for a line frequency fL=60 Hz, the ripple frequency fR=2·fL=2·60 Hz=120 Hz. The Vc(t) DC offset can change over time due to input power fluctuations and load power demand fluctuations. Thus, the PFC andoutput voltage controller 114 monitors the output voltage Vc(t) and adjusts the control signal CS0 to return the output voltage Vc(t) to the desired value. - The
ripple 202 can adversely influence the determination of the control signal CS0 by PFC andoutput voltage controller 114. To minimize the influence ofripple 202 on the control signal CS0, thevoltage loop 118 operates at a much slower frequency fv, typically 10-20 Hz, than the line frequency fL. By operating at 10-20 Hz, thevoltage loop 118 functions as a low pass filter to filter outripple 202. However, operating at 10-20 Hz also slows the response of PFC andoutput voltage controller 114 to changes in the output voltage Vc(t). -
FIG. 3 depicts a generalized representation of apower control system 300 described in Prodic. The PFC andoutput voltage controller 302 of Prodic includes anerror generator 304 to determine an error signal ed(t). The error signal ed(t) represents a difference between the output voltage Vc(t) and a reference voltage VREF. The reference voltage VREF is set to the desired value of output voltage Vc(t). Acomb filter 306 filters the error signal ed(t). Thecomb filter 306 has significant attenuation at equally spaced frequencies (referred to as “notches”) and has unity gain at other frequencies. Thecomb filter 306 automatically tunes the notches to match twice the line frequency fL and harmonics of the line frequency. According to Prodić, thecomb filter 306 generates a “ripple free” error signal evf(t).Compensator 308 processes the filtered error signal, and input voltage feedback signal Vx(t) generates a compensator output signal. The pulse width modulator (PWM) 310 processes the compensator output signal to generate control signal CS0a. - However, it would be desirable to provide a digital pre-processing filter.
- In one embodiment of the present invention, an apparatus includes a FIR filter to generate discrete samples of an output voltage feedback signal associated with an output voltage of a switching power converter. The FIR filter is configured to generate the discrete samples at a sampling frequency fs, the sampling frequency fs is approximately an integer multiple of a line frequency fL, and the line frequency fL is a frequency of a line input voltage supplied to the switching power converter. The apparatus also includes a switch state controller, coupled to the FIR filter. The switch state controller is configured to receive a signal associated with the discrete samples generated by the FIR filter and use the received signal to generate a control signal to provide power factor correction and to regulate the output voltage of the switching power converter. The switch state controller is further configured to provide the control signal to the switching power converter.
- In another embodiment of the present invention, a method of regulating an output voltage of a switching power converter includes generating discrete samples of an output voltage feedback signal associated with an output voltage of a switching power converter using a FIR filter. The FIR filter is configured to generate the discrete samples at a sampling frequency fs, the sampling frequency fs is approximately an integer multiple of a line frequency fL, and the line frequency fL is a frequency of a line input voltage supplied to the switching power converter. The method further includes receiving a signal associated with the discrete samples generated by the FIR filter and using the received signal to generate a control signal to provide power factor correction and to regulate the output voltage of the switching power converter. The method also includes providing the control signal to the switching power converter.
- In a further embodiment of the present invention, an apparatus for regulating an output voltage of a switching power converter includes a FIR filter to generate discrete samples of an output voltage feedback signal associated with an output voltage of a switching power converter. The FIR filter is configured to generate the discrete samples at a sampling frequency fs, the sampling frequency fs is approximately an integer multiple of a line frequency fL, and the line frequency fL is a frequency of a line input voltage supplied to the switching power converter. The apparatus also includes means for receiving a signal associated with the discrete samples generated by the FIR filter and means for using the received signal to generate a control signal to provide power factor correction and to regulate the output voltage of the switching power converter. The apparatus further includes means for providing the control signal to the switching power converter.
- The present invention may be better understood, and its numerous objects, features and advantages made apparent to those skilled in the art by referencing the accompanying drawings. The use of the same reference number throughout the several figures designates a like or similar element.
-
FIG. 1 (labeled prior art) depicts a power control system. -
FIG. 2 (labeled prior art) depicts a power control system output voltage with an alternating current ripple component versus time graph. -
FIG. 3 (labeled prior art) depicts a power and control system with an output voltage feedback filter. -
FIG. 4A depicts a power control system that includes a sampling module with a digital finite impulse response (FIR) filter. -
FIG. 4B depicts a graph of a boxcar FIR filter frequency response. -
FIGS. 5 and 6 depict respective embodiments of the power control system ofFIG. 4A . -
FIG. 7 depicts a power control system that includes a sampling module with a digital FIR filter and a single feedback path. - A power control system includes a digital FIR filter in an output voltage feedback loop of a switching power converter. A feedback loop provides an output voltage signal of the switching power converter to a PFC and output voltage controller. The output voltage signal includes direct current (DC) and alternating current (AC) components. The FIR filter provides discrete samples of an output voltage feedback signal to a switch state controller that allows the switch state controller to generate a control signal that reflects a relatively fast response to changes in the output voltage signal while reducing an influence of the AC component on the control signal.
- In at least one embodiment, the FIR filter is configured to generate the discrete samples at a sampling frequency fs, the sampling frequency fs is approximately an integer multiple of a line frequency fL, and the line frequency fL is a frequency of a line input voltage supplied by a voltage source to the switching power converter. In at least one embodiment, the sampling frequency fs is an integer multiple greater than or equal to twice the line frequency fL, and the FIR filter is a boxcar filter with a number of taps equal to fs/(2·fL) and coefficients all equal to (2·fL)/fs. In other embodiments, the boxcar filter has sampling frequency fs relationship to the line frequency fL and tap numbers as depicted in Table 1:
-
TABLE 1 Sampling Frequency fs Number of Taps fs = fL 1 fs = 2 · fL 1 or 2 fs = 4 · f L1, 2, or 4 fs = N · fL, N is an integer 1, 2, . . . , or N - The boxcar FIR filter provides attenuation (“notches”) at the ripple frequency and harmonics thereof. In at least one embodiment, the boxcar FIR filter is convolved with itself, yielding a triangular FIR filter that provides even more attenuation at the ripple frequency and harmonics thereof. Increasing the number of taps of the FIR filter can reduce errors in the output samples of the FIR filter. The particular implementation of the taps is a matter of design choice. In at least one embodiment, the taps are implemented in a serial chain of sample and hold circuits, such as one D flip-flop per tap, together with coefficient multipliers (not shown) for each tap and a summation circuit connected to the output of each coefficient multiplier. In at least one embodiment, the FIR filter is implemented in software executed by a processor of, for example, PFC and output voltage controller 404 (
FIG. 4A ). - In at least one embodiment, the PFC and
output voltage controller 404 responds to changes in the output voltage of the switching power converter at a frequency greater than or equal to the line frequency fL up to and including the sampling frequency. In at least one embodiment, the output voltage feedback signal is a direct sampled version of the switching power converter output voltage. In at least one embodiment, the output voltage feedback signal is an error signal determined from a difference between samples of the output voltage of the switching power converter and a reference signal. In at least one embodiment, the reference signal represents a desired output voltage of the switching power converter. The desired output voltage of the power control system is a design choice and depends on the voltage output demand of an intended load or loads. For example, light emitting diode fixtures can have an output voltage demand of 400 V. -
FIG. 4A depicts one embodiment of apower control system 400 that includes switchingpower converter 402 and a PFC andoutput voltage controller 404. The PFC andoutput voltage controller 404 includes asampling module 408, and thesampling module 408 includes adigital FIR filter 412. In at least one embodiment, thesampling module 408 allows the PFC andoutput voltage controller 404 to respond to changes in the output voltage signal Vc(t) of switchingpower converter 402 at a frequency greater than or equal to approximately the line frequency fL up to approximately a sampling frequency fs while reducing an influence of the AC “ripple” component of the output voltage Vc(t). In at least one embodiment, the PFC andoutput voltage controller 302 is programmable as illustratively described in U.S. patent application entitled “Programmable Power Control System”, inventor John L. Melanson, assignee Cirrus Logic, Inc., and attorney docket number 1759-CA, which is incorporated herein by reference in its entirety. - The switching
power converter 402 includes a power factor correction (PFC)stage 409 to provide power factor correction. The switchingpower converter 402 also includes adriver stage 410 to provide a regulated output voltage Vc(t) to load 112. In at least one embodiment,PFC stage 409 anddriver stage 410 are identical torespective PFC stage 124 anddriver stage 126. - The PFC and
output voltage controller 404 receives output voltage Vc(t) viafeedback loop 412. In at least one embodiment, the output voltage Vc(t) is received fromnode 122 at an input terminal of PFC andoutput voltage controller 404. Thedigital FIR filter 412 filters an output voltage feedback signal. In at least one embodiment, the output voltage feedback signal is the output voltage Vc(t), and the sampled output voltage feedback signal represents the DC offset of the output voltage Vc(t). In at least one embodiment, the output voltage feedback signal is an error signal, and the sampled output voltage feedback signal is directly and linearly related to the DC offset of the output voltage Vc(t). - The output voltage feedback signal includes
ripple 202. In at least one embodiment, theFIR filter 412 samples and processes the output voltage feedback signal and through significant attenuation at the ripple frequency fR and harmonics thereof effectively eliminates the frequency components ofripple 202 from the output voltage feedback signal. By attenuating theripple 202 from a sampling module output signal VCF(n) provided from thesampling module 408 to the PFC andcontroller module 406, the PFC andcontroller module 406 can reduce the influence ofripple 202 on the determination of a control signal CS1. Additionally, the input signal to the PFC andcontroller module 406 is sampled at a sampling frequency fs, and, in at least one embodiment, the sampling frequency fs is equal to the line frequency fL or greater. Thus, in at least one embodiment, the PFC andcontroller module 406 can update the control signal CS1 at the sampling frequency fs and respond to changes in the output voltage Vc(t) at the sampling frequency fs. - Frequency fD represents an output frequency for
sampling module 408 of discrete samples of the sampling module output signal VCF(n) provided to PFC andcontroller module 406. In at least one embodiment, the sampling frequency fs is greater than the sampling output frequency fD of discrete samples provided to PFC andcontroller module 406. As subsequently discussed in more detail, increasing the sampling frequency fs can reduce an error between the DC offset of the sampled output voltage feedback signal and the actual DC offset of output voltage Vc(t). However, as the sampling output frequency fD of the discrete samples increases, the response time of control signal CS1 to changes in the output voltage Vc(t) decreases. As the response time of control signal CS1 decreases, the control signal CS1 becomes more sensitive to even minor fluctuations in the power demand ofload 112, which can cause, for example, oscillations in the output voltage Vc(t). Thus, the sampling output frequency fD and the corresponding response time of control signal CS1 are design choices. In at least one embodiment, the sampling output frequency fD and the response time of control signal CS1 are chosen to track the output voltage Vc(t) as accurately as possible without damaging or unnecessarily reducing the life expectancy of components of thepower control system 400 and without producing oscillations of the output voltage Vc(t). - The sampling frequency fs of the
FIR filter 412 is approximately an integer multiple of the line frequency fL. Unless explicitly indicated otherwise, the term “approximately” represents a nearly exact or an exact match. A value is “nearly exact” if the value achieves acceptable performance. Thus, in at least one embodiment, the sampling frequency fs=N·fL, where N is any integer greater than or equal to one. - The
ripple 202 is generally periodic in time. Thus, sampling the output voltage feedback signal at the line frequency fL or integer multiples thereof has the effect in the time domain of sampling theripple 202 at the same time(s) during each period of theripple 202. Accordingly, in the time domain, the sampled output voltage feedback signal represents a DC offset voltage of output voltage Vc(t), thus removing theripple 202 from a feedback signal provided to PFC andcontroller module 406. - In at least one embodiment, the
FIR filter 412 is a notch filter with significant attenuation at the sampling frequency fs and harmonics of the sampling frequency fs. The particular topology ofFIR filter 412 is a matter of design choice. In at least one embodiment, theFIR filter 412 is a boxcar filter designed to provide notches at the ripple frequency fR and harmonics thereof. In at least one embodiment, theFIR filter 412 is a boxcar filter convolved with itself, yielding a triangular FIR filter, that provides even more attenuation at the ripple frequency fR and harmonics thereof. -
FIG. 4B depicts a boxcarfilter frequency response 450 withnotches respective frequencies 120 Hz, 240 Hz, 360 Hz, 480 Hz, and subsequent harmonic frequencies. The boxcar filter has a sinc function and, thus, provides increasing average attenuation between notches. - As depicted in Table 1, in at least one embodiment, the
FIR filter 412 has one tap and a sampling frequency fs=fL. Thus, in one embodiment, the line frequency fL=60 Hz, the ripple frequency fR=120 Hz, and the sampling frequency fs=60 Hz. Thus, the number of taps equals 1, and the coefficient equals one. Thus, a FIR filter with a sampling frequency fs=fL, simply samples the output voltage feedback signal at the line frequency. - As also depicted in Table 1, in at least one embodiment, the
FIR filter 412 has one or two taps and a sampling frequency fs=2·fL. In at least one embodiment, the line frequency fL=60 Hz, the ripple frequency fR=120 Hz, and the sampling frequency fs=120 Hz. The number of taps equals 1 or 2, and the coefficients equal 1 or ½. Thus, a FIR filter with a sampling frequency fs=2·fL, simply samples the output voltage feedback signal at twice the line frequency fL with a low number of taps and coefficient multiply/add operations. - As also depicted in Table 1, in at least one embodiment, the
FIR filter 412 has one, two, or four taps and a sampling frequency fs=4·fL. In at least one embodiment, the line frequency fL=60 Hz, the ripple frequency fR=120 Hz, and the sampling frequency fs=240 Hz. The number of taps equals 1, 2, or 4, and the coefficients respectively equal 1, ½, or ¼. Thus, a FIR filter with a sampling frequency fs=2·fL, simply samples the output voltage feedback signal at twice the line frequency fL with a low number of taps and coefficient multiply/add operations. - Even if
FIR filter 412 removes the frequency components ofripple 202, theripple 202 can still adversely influence determination of the control signal CS1 because of, for example, DC offset errors in the determination of the output voltage Vc(t) from the discrete samples ofFIR filter 412. For example, if theFIR filter 412 samples the output voltage feedback signal once during each period ofripple 202 and ifripple 202 is sampled at a time that does not exactly coincide with the beginning, mid-point, or end of the period (i.e. at the zero crossings relative to the actual DC offset of output voltage Vc(t)), the samples will reflect an additional DC offset equal to a difference between the DC offset of the sample and the actual DC offset of output voltage Vc(t). - In at least one embodiment, increasing the number of taps of
FIR filter 412 decreases a DC offset error between discrete sample output data ofFIR filter 412 and the filtered output voltage feedback signal. Additionally, increasing the number of taps smoothes transitions in the output data ofFIR filter 412 as the output voltage Vc(t) changes. In at least one embodiment,FIR filter 412 has a number of taps equal to fs/(2·fL), in which identical tap coefficients all equal to (2·fL)/fs, and sampling frequency fs=N·fL, where N is any integer greater than or equal to two. Thus, for a line frequency fL equal to 60 Hz and a sampling frequency fs equal to 120 Hz, theFIR filter 412 has notches at 120 Hz, 240 Hz, 360 Hz, and so on. For example, for an 8-tap FIR filter 412, if the line frequency fL=60 Hz, the sampling frequency fs equals 960 Hz, i.e. (8)(2)(60), and each tap coefficient is ⅛. The 8-tap FIR filter 412 removes the ripple frequency fR and harmonics thereof. -
Sampling module 408 generates a discrete sampling module output signal VCF(n) at a sampling output frequency fD. As previously discussed, the sampling output frequency fD is a matter of design choice. In at least one embodiment, each sample of output signal VCF(n) of thesampling module 408 is an output of theFIR filter 412. In at least one embodiment, the output signal VCF(n) represents a moving average of the output voltage feedback signal by continuously moving samples of the output voltage feedback signal throughFIR filter 412. Thus, the sampling output frequency fD equals the sampling frequency fs. In another embodiment, theFIR filter 412 processes fs/fL samples, generates an output sample of output signal VCF(n), and discards (i.e. flushes) one or more of the state variables ofFIR filter 412 before proceeding to generate the next output sample VCF(n+1). If all of the state variables are discarded, the sampling output frequency fD equals the line frequency fL. Thus, by selectively discarding or keeping one or more of the state variables ofFIR filter 412, the sampling output frequency fD can be the line frequency fL, the sampling frequency fs, or a frequency in between. - The PFC and
output voltage controller 404 also receives signal VS(t) from switchingpower converter 402 viafeedback loop 414. In at least one embodiment, the feedback signal VS(t) senses the rectified line input voltage Vx(t) at theinput node 120. In another embodiment, the feedback signal VS(t) represents a voltage at theswitch node 412. In at least one embodiment, the PFC andoutput voltage controller 404 can determine the line input voltage Vx(t), the output voltage Vc(t), or both from the voltage at theswitch node 410 as, for example, described in the U.S. patent application entitled “Power Factor Correction Controller With Feedback Reduction”, inventor John L. Melanson, assignee Cirrus Logic, Inc., and attorney docket number 1756-CA (“Melanson I”) and as, for example described in the U.S. patent application entitled “Power Factor Correction Controller With Switch Node Feedback”, inventor John L. Melanson, assignee Cirrus Logic, Inc., and attorney docket number 1757-CA (“Melanson II”). Melanson I and Melanson II are incorporated herein by reference in their entireties. - In embodiments of PFC and
output voltage controller 404, the PFC andcontroller module 406 processes the feedback signal VS(t) and the input signal VCF(n) in accordance with the PFC and output voltage controllers described in Melanson I and Melanson II, with the input signal VCF(n) representing the output voltage Vc(t) in Melanson I and Melanson II. In at least one embodiment, PFC andcontroller module 406 processes feedback signal VS(t) and the input signal VCF(n) using the current and voltage compensators and pulse width modulator as described in Prodić. - The PFC and
output voltage controller 404 can be implemented using discrete components, as one or more integrated circuits, or as a combination of discrete components and one or more integrated circuits. When implemented as one or more integrated circuits, the feedback signals VS(t) and output voltage Vc(t) can be scaled to an input voltage useable by PFC andoutput voltage controller 404. Exemplary sensor converters, such as voltage dividers and current sources described in Melanson I and Melanson II, can be used to scale the feedback signals VS(t) and output voltage Vc(t). -
FIG. 5 depicts apower control system 500, which is one embodiment ofpower control system 400. Thesampling module 502 represents one embodiment ofsampling module 408. The output voltage Vc(t) of switchingpower converter 404 is fed back directly toFIR filter 412. In this embodiment, the output voltage Vc(t) represents the output voltage feedback signal referenced in conjunction with power control system 400 (FIG. 4A ). FIR filter generates sampling module output signal VCF(n). Anerror generator 304 determines a difference between the output signal VF(n) and a reference voltage VREF by, for example, subtracting the output signal VF(n) from the reference voltage VREF. The reference voltage VREF is set to the desired value of output voltage Vc(t). Thus, since the output signal VF(n) represents the DC offset of the output voltage Vc(t), in this embodiment, the sampling module output signal VCF(n) represents an estimated error between the output voltage Vc(t) and the desired voltage value VREF. - In at least one embodiment, difficulties may arise in producing a sampling frequency fs that is an exact integer multiple of the line frequency fL. For example, if
FIR filter 412 has 95 taps, the tap coefficients are all 1/95. Multiplying each sample in theFIR filter 412 by 1/95 can be a costly calculation in terms of time and implementation. -
FIG. 6 depicts apower control system 600, which is one embodiment ofpower control system 400. Thesampling module 602 represents one embodiment ofsampling module 408. The output voltage Vc(t) of switchingpower converter 404 is fed back directly toerror generator 304.Error generator 304 determines a difference signal ed(t) between the output voltage signal Vc(t) and a reference voltage VREF by, for example, subtracting the output voltage signal Vc(t) from the reference voltage VREF. In this embodiment, the difference signal ed(t) represents the output voltage feedback signal referenced in conjunction with power control system 400 (FIG. 4A ). TheFIR filter 412 filters the difference signal ed(t) and generates sampling module output signal VCF(n). By filtering the difference signal ed(t), the gain factor 1/(number of taps), e.g. 1/95, does not have to be as accurate as the gain factor insampling module 602 since the output signal VCF(n) is only a feedback error value. Thus, a less costly multiplication by, for example, 1/96, for a 95tap FIR filter 412 can be used with a negligible, if any, resulting performance loss. In at least one embodiment, an approximately 20% or less deviation in the gain factors from the ideal gain factor, i.e. 1/(number of taps), is acceptable. Since the output signal VCF(n) represents the DC offset of the output voltage Vc(t), in this embodiment, the sampling module output signal VCF(n) also represents an estimated error between the output voltage Vc(t) and the desired voltage value VREF. -
FIG. 7 depicts apower control system 700.Power control system 700 is identical topower control system 400 except that the output voltage signal Vc(t) and the input voltage Vx(t) is determined from the feedback signal VS(t). The feedback signal VS(t), in the embodiment ofFIG. 7 , represents a voltage at theswitch node 412. In at least one embodiment, the input voltage Vx(t) and output voltage Vc(t) are determined from the feedback signal VS(t) by PFC andoutput voltage controller 702 as described in Melanson I and Melanson II. - Thus, power control systems include a digital FIR filter. The FIR filter provides discrete samples of an output voltage feedback signal to a switch state controller that allows the switch state controller to generate a control signal that reflects a relatively quick response to changes in the output voltage signal while reducing an influence of the AC “ripple” component.
- Although the present invention has been described in detail, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (26)
1. An apparatus comprising:
a FIR filter to generate discrete samples of an output voltage feedback signal associated with an output voltage of a switching power converter, wherein the FIR filter is configured to generate the discrete samples at a sampling frequency fs, the sampling frequency fs is approximately an integer multiple of a line frequency fL, and the line frequency fL is a frequency of a line input voltage supplied to the switching power converter; and
a switch state controller, coupled to the FIR filter, wherein the switch state controller is configured to:
receive a signal associated with the discrete samples generated by the FIR filter;
use the received signal to generate a control signal to provide power factor correction and to regulate the output voltage of the switching power converter; and
provide the control signal to the switching power converter.
2. The apparatus of claim 1 wherein the output voltage feedback signal represents the output voltage of the switching power converter, the apparatus further comprising:
an error generator coupled between the FIR filter and the switch state controller, wherein the error generator is configured to generate the signal received by the switch state controller from a difference between the discrete samples generated by the FIR filter and a reference voltage.
3. The apparatus of claim 1 further comprising:
an error generator to generate the output voltage feedback signal from a difference between an output voltage of the switching power converter and a reference signal.
4. The apparatus of claim 1 wherein the FIR filter includes N taps, wherein N is an integer greater than or equal to 2, and N=fs/(2·fL).
5. The apparatus of claim 4 wherein the discrete samples generated by the FIR filter have a sampling frequency in the range of the line frequency fL to N·line frequency fL wherein N is an integer equal to or greater than one.
6. The apparatus of claim 1 wherein the discrete samples generated by the FIR filter have a sampling frequency equal to the line frequency fL.
7. The apparatus of claim 1 wherein the FIR filter is a boxcar filter that includes a notch at approximately twice the line frequency fL.
8. The apparatus of claim 1 wherein the frequency fs is a member of the group consisting of (i) the line input voltage frequency, (ii) 2 times the line input voltage frequency, and (iii) 4 times the line input voltage frequency.
9. The apparatus of claim 1 wherein the FIR filter is a box car filter having a sampling frequency fs selected from the group consisting of fs=fL, fs=2·fL, and fs=4·fL, and a number of taps, corresponding to the sampling frequency fs, selected from the group Number of Taps as set forth in Table 2:
10. The apparatus of claim 1 further comprising:
an input to (i) couple to an output voltage node of the switching power converter and (ii) to receive an output voltage feedback signal corresponding to the output voltage at the output voltage node; and
wherein the switch state controller is further configured to:
respond to changes in the output voltage feedback signal at the frequency fs.
11. The apparatus of claim 1 further comprising:
a sampler to sample the output voltage at frequency fs and to generate the output voltage feedback signal.
12. The apparatus of claim 1 further comprising:
an input terminal to receive a signal representing an input current to the switching power converter;
wherein the switch state controller is further configured to also use the signal representing the input current to the switching power converter to generate the control signal to provide power factor correction and to regulate the output voltage.
13. A method of regulating an output voltage of a switching power converter, the method comprising:
generating discrete samples of an output voltage feedback signal associated with an output voltage of a switching power converter using a FIR filter, wherein the FIR filter is configured to generate the discrete samples at a sampling frequency fs, the sampling frequency fs is approximately an integer multiple of a line frequency fL, and the line frequency fL is a frequency of a line input voltage supplied to the switching power converter;
receiving a signal associated with the discrete samples generated by the FIR filter;
using the received signal to generate a control signal to provide power factor correction and to regulate the output voltage of the switching power converter; and
providing the control signal to the switching power converter.
14. The method of claim 13 wherein the output voltage feedback signal represents the output voltage of the switching power converter, the method further comprising:
generating the signal received by the switch state controller from a difference between the discrete samples generated by the FIR filter and a reference voltage.
15. The method of claim 13 further comprising:
generating the output voltage feedback signal from a difference between an output voltage feedback signal of the switching power converter and a reference signal.
16. The method of claim 13 wherein the FIR filter includes N taps, wherein N is an integer greater than or equal to 2 and N=fs/(2·fL).
17. The method of claim 16 wherein the discrete samples generated by the FIR filter have a sampling frequency in the range of the line frequency fL to N·line frequency fL.
18. The method of claim 13 wherein the discrete samples generated by the FIR filter have a sampling frequency equal to the line frequency fL.
19. The method of claim 13 wherein the FIR filter has a low pass transfer function with a notch at approximately the sampling frequency fs.
20. The method of claim 13 wherein the FIR filter is a boxcar filter that includes a notch at approximately twice the line frequency fL.
21. The method of claim 13 wherein the frequency fs is a member of the group consisting of (i) the line input voltage frequency, (ii) 2 times the line input voltage frequency, and (iii) 4 times the line input voltage frequency.
22. The method of claim 13 wherein the FIR filter is a box car filter having a sampling frequency fs selected from the group consisting of fs=fL, fs=2·fL, and fs=4·fL, and a number of taps, corresponding to the sampling frequency fs, selected from the group Number of Taps as set forth in the following table:
23. The method of claim 13 further comprising:
receiving an output voltage feedback signal corresponding to the output voltage of the switching power converter;
responding to changes in the output voltage feedback signal at the frequency fs.
24. The method of claim 13 further comprising:
sampling the output voltage at frequency fs; and
generating the output voltage feedback signal.
25. The method of claim 13 further comprising:
receiving a signal representing an input current to the switching power converter; and
using the signal representing an input current to the switching power converter to generate the control signal to provide power factor correction and to regulate the output voltage.
26. An apparatus for regulating an output voltage of a switching power converter, the apparatus comprising:
a FIR filter to generate discrete samples of an output voltage feedback signal associated with an output voltage of a switching power converter, wherein the FIR filter is configured to generate the discrete samples at a sampling frequency fs, the sampling frequency fs is approximately an integer multiple of a line frequency fL, and the line frequency fL is a frequency of a line input voltage supplied to the switching power converter;
means for receiving a signal associated with the discrete samples generated by the FIR filter;
means for using the received signal to generate a control signal to provide power factor correction and to regulate the output voltage of the switching power converter; and
means for providing the control signal to the switching power converter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/967,276 US20080272756A1 (en) | 2007-05-02 | 2007-12-31 | Power factor correction controller with digital fir filter output voltage sampling |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US91554707P | 2007-05-02 | 2007-05-02 | |
US11/967,276 US20080272756A1 (en) | 2007-05-02 | 2007-12-31 | Power factor correction controller with digital fir filter output voltage sampling |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080272756A1 true US20080272756A1 (en) | 2008-11-06 |
Family
ID=39564796
Family Applications (15)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/865,032 Active US7554473B2 (en) | 2007-05-02 | 2007-09-30 | Control system using a nonlinear delta-sigma modulator with nonlinear process modeling |
US11/967,272 Active 2029-01-14 US7888922B2 (en) | 2007-05-02 | 2007-12-31 | Power factor correction controller with switch node feedback |
US11/967,275 Expired - Fee Related US7969125B2 (en) | 2007-03-12 | 2007-12-31 | Programmable power control system |
US11/967,277 Active 2028-11-03 US7863828B2 (en) | 2007-05-02 | 2007-12-31 | Power supply DC voltage offset detector |
US11/967,271 Expired - Fee Related US8040703B2 (en) | 2007-03-12 | 2007-12-31 | Power factor correction controller with feedback reduction |
US11/967,269 Expired - Fee Related US7719246B2 (en) | 2007-03-12 | 2007-12-31 | Power control system using a nonlinear delta-sigma modulator with nonlinear power conversion process modeling |
US11/967,273 Active 2028-02-20 US7746043B2 (en) | 2007-03-12 | 2007-12-31 | Inductor flyback detection using switch gate change characteristic detection |
US11/967,276 Abandoned US20080272756A1 (en) | 2007-05-02 | 2007-12-31 | Power factor correction controller with digital fir filter output voltage sampling |
US12/107,613 Active 2028-07-21 US7821237B2 (en) | 2007-05-02 | 2008-04-22 | Power factor correction (PFC) controller and method using a finite state machine to adjust the duty cycle of a PWM control signal |
US12/110,714 Active 2028-11-12 US7719248B1 (en) | 2007-05-02 | 2008-04-28 | Discontinuous conduction mode (DCM) using sensed current for a switch-mode converter |
US12/113,536 Expired - Fee Related US8125805B1 (en) | 2007-05-02 | 2008-05-01 | Switch-mode converter operating in a hybrid discontinuous conduction mode (DCM)/continuous conduction mode (CCM) that uses double or more pulses in a switching period |
US12/114,130 Active 2030-07-17 US8120341B2 (en) | 2007-05-02 | 2008-05-02 | Switching power converter with switch control pulse width variability at low power demand levels |
US12/114,147 Active 2029-08-07 US7894216B2 (en) | 2007-05-02 | 2008-05-02 | Switching power converter with efficient switching control signal period generation |
US12/986,761 Abandoned US20110103111A1 (en) | 2007-05-02 | 2011-01-07 | Switching Power Converter With Efficient Switching Control Signal Period Generation |
US13/351,069 Abandoned US20120194143A1 (en) | 2007-05-02 | 2012-01-16 | Switch-Mode Converter Operating in a Hybrid Discontinuous Conduction Mode (DCM)/Continuous Conduction Mode (CCM) That Uses Double or More Pulses in a Switching Period |
Family Applications Before (7)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/865,032 Active US7554473B2 (en) | 2007-05-02 | 2007-09-30 | Control system using a nonlinear delta-sigma modulator with nonlinear process modeling |
US11/967,272 Active 2029-01-14 US7888922B2 (en) | 2007-05-02 | 2007-12-31 | Power factor correction controller with switch node feedback |
US11/967,275 Expired - Fee Related US7969125B2 (en) | 2007-03-12 | 2007-12-31 | Programmable power control system |
US11/967,277 Active 2028-11-03 US7863828B2 (en) | 2007-05-02 | 2007-12-31 | Power supply DC voltage offset detector |
US11/967,271 Expired - Fee Related US8040703B2 (en) | 2007-03-12 | 2007-12-31 | Power factor correction controller with feedback reduction |
US11/967,269 Expired - Fee Related US7719246B2 (en) | 2007-03-12 | 2007-12-31 | Power control system using a nonlinear delta-sigma modulator with nonlinear power conversion process modeling |
US11/967,273 Active 2028-02-20 US7746043B2 (en) | 2007-03-12 | 2007-12-31 | Inductor flyback detection using switch gate change characteristic detection |
Family Applications After (7)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/107,613 Active 2028-07-21 US7821237B2 (en) | 2007-05-02 | 2008-04-22 | Power factor correction (PFC) controller and method using a finite state machine to adjust the duty cycle of a PWM control signal |
US12/110,714 Active 2028-11-12 US7719248B1 (en) | 2007-05-02 | 2008-04-28 | Discontinuous conduction mode (DCM) using sensed current for a switch-mode converter |
US12/113,536 Expired - Fee Related US8125805B1 (en) | 2007-05-02 | 2008-05-01 | Switch-mode converter operating in a hybrid discontinuous conduction mode (DCM)/continuous conduction mode (CCM) that uses double or more pulses in a switching period |
US12/114,130 Active 2030-07-17 US8120341B2 (en) | 2007-05-02 | 2008-05-02 | Switching power converter with switch control pulse width variability at low power demand levels |
US12/114,147 Active 2029-08-07 US7894216B2 (en) | 2007-05-02 | 2008-05-02 | Switching power converter with efficient switching control signal period generation |
US12/986,761 Abandoned US20110103111A1 (en) | 2007-05-02 | 2011-01-07 | Switching Power Converter With Efficient Switching Control Signal Period Generation |
US13/351,069 Abandoned US20120194143A1 (en) | 2007-05-02 | 2012-01-16 | Switch-Mode Converter Operating in a Hybrid Discontinuous Conduction Mode (DCM)/Continuous Conduction Mode (CCM) That Uses Double or More Pulses in a Switching Period |
Country Status (7)
Country | Link |
---|---|
US (15) | US7554473B2 (en) |
EP (5) | EP2153511B1 (en) |
JP (1) | JP2010526496A (en) |
CN (5) | CN101743683B (en) |
AT (1) | ATE495569T1 (en) |
DE (1) | DE602008004510D1 (en) |
WO (7) | WO2008137315A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012002824A2 (en) * | 2010-06-29 | 2012-01-05 | Eaton Industries Company | Closed loop control of a cyclo-converter |
US20130114306A1 (en) * | 2011-11-08 | 2013-05-09 | Lincoln Global, Inc. | Dynamic power factor correction and dynamic control for converter in power supply |
US20140009982A1 (en) * | 2012-07-05 | 2014-01-09 | Delta Electronics, Inc. | Feedback control circuit for power converter and power converter system |
DE102012108011A1 (en) * | 2012-08-30 | 2014-03-06 | Infineon Technologies Austria Ag | Switching circuit for controlling switch in switching converter, has control circuit that provides control signal, on basis of generated synchronization signal, for controlling switch in switching converter |
US20170163142A1 (en) * | 2015-05-21 | 2017-06-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Switched mode power supply compensation loop |
CN109245575A (en) * | 2018-10-23 | 2019-01-18 | 中国船舶重工集团公司第七二三研究所 | A kind of VIENNA rectifier stochastical sampling method |
US10390393B2 (en) * | 2015-12-22 | 2019-08-20 | Silergy Semiconductor Technology (Hangzhou) Ltd | Ripple suppression circuit, suppression method and LED lighting apparatus |
US20220158546A1 (en) * | 2020-11-16 | 2022-05-19 | Nexgen Power Systems, Inc. | Nonlinear, discrete time control of power factor correction power converter |
US11616435B2 (en) * | 2016-08-05 | 2023-03-28 | Rohm Co., Ltd. | Power supply controller with a load line compensator |
Families Citing this family (414)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7812576B2 (en) | 2004-09-24 | 2010-10-12 | Marvell World Trade Ltd. | Power factor control systems and methods |
US8672732B2 (en) | 2006-01-19 | 2014-03-18 | Schneider Electric It Corporation | Cooling system and method |
US8198873B2 (en) * | 2006-03-10 | 2012-06-12 | Texas Instruments (Cork) Limited | Power converter |
US7911812B2 (en) * | 2007-01-22 | 2011-03-22 | Power Integrations, Inc. | Control arrangement for a PFC power converter |
US7885085B2 (en) * | 2007-01-22 | 2011-02-08 | Power Integrations, Inc. | Cascaded PFC and resonant mode power converters |
US7848117B2 (en) | 2007-01-22 | 2010-12-07 | Power Integrations, Inc. | Control arrangement for a resonant mode power converter |
US8076920B1 (en) | 2007-03-12 | 2011-12-13 | Cirrus Logic, Inc. | Switching power converter and control system |
US7288902B1 (en) | 2007-03-12 | 2007-10-30 | Cirrus Logic, Inc. | Color variations in a dimmable lighting device with stable color temperature light sources |
US7804256B2 (en) | 2007-03-12 | 2010-09-28 | Cirrus Logic, Inc. | Power control system for current regulated light sources |
US8018171B1 (en) | 2007-03-12 | 2011-09-13 | Cirrus Logic, Inc. | Multi-function duty cycle modifier |
US8723438B2 (en) * | 2007-03-12 | 2014-05-13 | Cirrus Logic, Inc. | Switch power converter control with spread spectrum based electromagnetic interference reduction |
US7667408B2 (en) | 2007-03-12 | 2010-02-23 | Cirrus Logic, Inc. | Lighting system with lighting dimmer output mapping |
US7969756B1 (en) * | 2007-04-16 | 2011-06-28 | Lockheed Martin Corporation | Real-time switching regulator monitor |
US7554473B2 (en) | 2007-05-02 | 2009-06-30 | Cirrus Logic, Inc. | Control system using a nonlinear delta-sigma modulator with nonlinear process modeling |
EP2147585B1 (en) | 2007-05-15 | 2016-11-02 | Schneider Electric IT Corporation | Method and system for managing facility power and cooling |
JP4577525B2 (en) | 2007-05-31 | 2010-11-10 | 東芝ライテック株式会社 | Lighting device |
US8102127B2 (en) | 2007-06-24 | 2012-01-24 | Cirrus Logic, Inc. | Hybrid gas discharge lamp-LED lighting system |
WO2009023205A1 (en) * | 2007-08-14 | 2009-02-19 | Ramu, Inc. | Motor power factor correction apparatus and method |
US20090241592A1 (en) * | 2007-10-05 | 2009-10-01 | Emerson Climate Technologies, Inc. | Compressor assembly having electronics cooling system and method |
US8950206B2 (en) | 2007-10-05 | 2015-02-10 | Emerson Climate Technologies, Inc. | Compressor assembly having electronics cooling system and method |
US7895003B2 (en) | 2007-10-05 | 2011-02-22 | Emerson Climate Technologies, Inc. | Vibration protection in a variable speed compressor |
US8459053B2 (en) | 2007-10-08 | 2013-06-11 | Emerson Climate Technologies, Inc. | Variable speed compressor protection system and method |
US8448459B2 (en) | 2007-10-08 | 2013-05-28 | Emerson Climate Technologies, Inc. | System and method for evaluating parameters for a refrigeration system with a variable speed compressor |
US8418483B2 (en) | 2007-10-08 | 2013-04-16 | Emerson Climate Technologies, Inc. | System and method for calculating parameters for a refrigeration system with a variable speed compressor |
US9541907B2 (en) | 2007-10-08 | 2017-01-10 | Emerson Climate Technologies, Inc. | System and method for calibrating parameters for a refrigeration system with a variable speed compressor |
US8539786B2 (en) | 2007-10-08 | 2013-09-24 | Emerson Climate Technologies, Inc. | System and method for monitoring overheat of a compressor |
US8488353B2 (en) * | 2007-10-31 | 2013-07-16 | International Rectifier Corporation | Control integrated circuit with combined output and input |
US7728571B2 (en) * | 2007-11-06 | 2010-06-01 | Richtek Technology Corporation, R.O.C. | Load-dependent frequency jittering circuit and load-dependent frequency jittering method |
US8344639B1 (en) * | 2008-11-26 | 2013-01-01 | Farhad Bahrehmand | Programmable LED driver |
US7804697B2 (en) * | 2007-12-11 | 2010-09-28 | Cirrus Logic, Inc. | History-independent noise-immune modulated transformer-coupled gate control signaling method and apparatus |
EP2238676B1 (en) * | 2008-01-24 | 2012-03-14 | Continental Automotive Systems US, Inc. | Multi-stage switching power supply |
EP2083511B1 (en) * | 2008-01-25 | 2014-01-22 | Actaris SAS | Battery power supply for radio frequency transmitter |
US7755525B2 (en) * | 2008-01-30 | 2010-07-13 | Cirrus Logic, Inc. | Delta sigma modulator with unavailable output values |
US8022683B2 (en) | 2008-01-30 | 2011-09-20 | Cirrus Logic, Inc. | Powering a power supply integrated circuit with sense current |
US8008898B2 (en) | 2008-01-30 | 2011-08-30 | Cirrus Logic, Inc. | Switching regulator with boosted auxiliary winding supply |
US8576589B2 (en) | 2008-01-30 | 2013-11-05 | Cirrus Logic, Inc. | Switch state controller with a sense current generated operating voltage |
US20090218997A1 (en) * | 2008-02-29 | 2009-09-03 | Hey George M | Power supply circuit |
EP2263417A1 (en) * | 2008-03-19 | 2010-12-22 | Nxp B.V. | A controller and method of operating a controller |
US8363439B2 (en) * | 2008-04-22 | 2013-01-29 | Flextronics Ap, Llc | Efficiency improvement in power factor correction |
US8085024B2 (en) * | 2008-04-29 | 2011-12-27 | Exar Corporation | Self-tuning digital current estimator for low-power switching converters |
US7952293B2 (en) * | 2008-04-30 | 2011-05-31 | Lsi Industries, Inc. | Power factor correction and driver circuits |
US8432108B2 (en) * | 2008-04-30 | 2013-04-30 | Lsi Industries, Inc. | Solid state lighting, driver circuits, and related software |
US20090296448A1 (en) * | 2008-05-30 | 2009-12-03 | Fu Lung Hsueh | Diode as voltage down converter for otp high programming voltage applications |
WO2009152468A2 (en) * | 2008-06-13 | 2009-12-17 | The Regents Of The University Of Colorado, A Body Corporate | Monitoring and control of power converters |
US8102164B2 (en) * | 2008-06-19 | 2012-01-24 | Power Integrations, Inc. | Power factor correction converter control offset |
US8008902B2 (en) * | 2008-06-25 | 2011-08-30 | Cirrus Logic, Inc. | Hysteretic buck converter having dynamic thresholds |
JP2010035271A (en) * | 2008-07-25 | 2010-02-12 | Sanken Electric Co Ltd | Power converter |
US8344707B2 (en) | 2008-07-25 | 2013-01-01 | Cirrus Logic, Inc. | Current sensing in a switching power converter |
US8014176B2 (en) | 2008-07-25 | 2011-09-06 | Cirrus Logic, Inc. | Resonant switching power converter with burst mode transition shaping |
US8212491B2 (en) | 2008-07-25 | 2012-07-03 | Cirrus Logic, Inc. | Switching power converter control with triac-based leading edge dimmer compatibility |
US8102679B2 (en) * | 2008-08-15 | 2012-01-24 | Infineon Technologies Ag | Utilization of a multifunctional pin to control a switched-mode power converter |
US8487546B2 (en) | 2008-08-29 | 2013-07-16 | Cirrus Logic, Inc. | LED lighting system with accurate current control |
US8179110B2 (en) | 2008-09-30 | 2012-05-15 | Cirrus Logic Inc. | Adjustable constant current source with continuous conduction mode (“CCM”) and discontinuous conduction mode (“DCM”) operation |
US8222872B1 (en) | 2008-09-30 | 2012-07-17 | Cirrus Logic, Inc. | Switching power converter with selectable mode auxiliary power supply |
US8829811B2 (en) * | 2008-11-18 | 2014-09-09 | Cypress Semiconductor Corporation | Compensation method and circuit for line rejection enhancement |
US8922189B2 (en) * | 2008-11-18 | 2014-12-30 | Texas Instruments Incorporated | Controlled on-time buck PFC |
EP2371052A1 (en) * | 2008-12-01 | 2011-10-05 | Koninklijke Philips Electronics N.V. | Emi reduction circuit for active pfc converter |
US8288954B2 (en) | 2008-12-07 | 2012-10-16 | Cirrus Logic, Inc. | Primary-side based control of secondary-side current for a transformer |
US8508150B2 (en) * | 2008-12-12 | 2013-08-13 | O2Micro, Inc. | Controllers, systems and methods for controlling dimming of light sources |
CN102014540B (en) | 2010-03-04 | 2011-12-28 | 凹凸电子(武汉)有限公司 | Drive circuit and controller for controlling electric power of light source |
US9232591B2 (en) | 2008-12-12 | 2016-01-05 | O2Micro Inc. | Circuits and methods for driving light sources |
US8044608B2 (en) | 2008-12-12 | 2011-10-25 | O2Micro, Inc | Driving circuit with dimming controller for driving light sources |
US8362707B2 (en) | 2008-12-12 | 2013-01-29 | Cirrus Logic, Inc. | Light emitting diode based lighting system with time division ambient light feedback response |
US9030122B2 (en) | 2008-12-12 | 2015-05-12 | O2Micro, Inc. | Circuits and methods for driving LED light sources |
US8330388B2 (en) * | 2008-12-12 | 2012-12-11 | O2Micro, Inc. | Circuits and methods for driving light sources |
US8339067B2 (en) * | 2008-12-12 | 2012-12-25 | O2Micro, Inc. | Circuits and methods for driving light sources |
US8299722B2 (en) | 2008-12-12 | 2012-10-30 | Cirrus Logic, Inc. | Time division light output sensing and brightness adjustment for different spectra of light emitting diodes |
US8076867B2 (en) | 2008-12-12 | 2011-12-13 | O2Micro, Inc. | Driving circuit with continuous dimming function for driving light sources |
US8378588B2 (en) | 2008-12-12 | 2013-02-19 | O2Micro Inc | Circuits and methods for driving light sources |
US9386653B2 (en) | 2008-12-12 | 2016-07-05 | O2Micro Inc | Circuits and methods for driving light sources |
US9253843B2 (en) | 2008-12-12 | 2016-02-02 | 02Micro Inc | Driving circuit with dimming controller for driving light sources |
US7994863B2 (en) | 2008-12-31 | 2011-08-09 | Cirrus Logic, Inc. | Electronic system having common mode voltage range enhancement |
CN102272686B (en) * | 2009-01-07 | 2015-04-01 | 宝威电源意大利股份公司 | Method and system for extracting electric power from a renewable energy source |
US20100171481A1 (en) * | 2009-01-08 | 2010-07-08 | Liu da-yi | Digital power control device |
US8553431B2 (en) * | 2009-02-03 | 2013-10-08 | Iwatt Inc. | Switching power converter with load impedance detection |
US8203287B2 (en) * | 2009-02-24 | 2012-06-19 | Richard Landry Gray | Pulse width modulation control device |
US8237419B2 (en) * | 2009-02-27 | 2012-08-07 | Schneider Electric USA, Inc. | Microcontroller operated current limited switching power supply for circuit protective devices |
US9006992B2 (en) * | 2009-04-11 | 2015-04-14 | Innosys, Inc. | Low current thyristor-based dimming |
KR101670994B1 (en) * | 2009-04-27 | 2016-11-01 | 페어차일드코리아반도체 주식회사 | Power factor correction circuit and driving method thereof |
US8482223B2 (en) | 2009-04-30 | 2013-07-09 | Cirrus Logic, Inc. | Calibration of lamps |
DE102009003852B4 (en) * | 2009-04-30 | 2013-05-16 | Lear Corporation Gmbh | DC converter |
CN101888734B (en) * | 2009-05-13 | 2014-07-16 | 通用电气公司 | Electronic ballast of belt lifting/voltage reducing power-factor correction DC-DC converter |
US8228046B2 (en) * | 2009-06-16 | 2012-07-24 | American Power Conversion Corporation | Apparatus and method for operating an uninterruptible power supply |
US8729729B2 (en) * | 2009-06-18 | 2014-05-20 | Mikhail Fridberg | Method and apparatus for driving low-power loads from AC sources |
US8963535B1 (en) | 2009-06-30 | 2015-02-24 | Cirrus Logic, Inc. | Switch controlled current sensing using a hall effect sensor |
US8198874B2 (en) * | 2009-06-30 | 2012-06-12 | Cirrus Logic, Inc. | Switching power converter with current sensing transformer auxiliary power supply |
US20100332857A1 (en) * | 2009-06-30 | 2010-12-30 | Vogman Viktor D | Reducing power losses in a redundant power supply system |
US8212493B2 (en) * | 2009-06-30 | 2012-07-03 | Cirrus Logic, Inc. | Low energy transfer mode for auxiliary power supply operation in a cascaded switching power converter |
US8248145B2 (en) | 2009-06-30 | 2012-08-21 | Cirrus Logic, Inc. | Cascode configured switching using at least one low breakdown voltage internal, integrated circuit switch to control at least one high breakdown voltage external switch |
CN101938869B (en) * | 2009-06-30 | 2012-12-26 | 辉芒微电子(深圳)有限公司 | Direct current (DC) control device in alternating current (AC) system |
TWI489903B (en) * | 2009-07-09 | 2015-06-21 | Light emitting diode lighting device and its current control method | |
US9112452B1 (en) | 2009-07-14 | 2015-08-18 | Rf Micro Devices, Inc. | High-efficiency power supply for a modulated load |
US8698433B2 (en) | 2009-08-10 | 2014-04-15 | Emerson Climate Technologies, Inc. | Controller and method for minimizing phase advance current |
US8264192B2 (en) | 2009-08-10 | 2012-09-11 | Emerson Climate Technologies, Inc. | Controller and method for transitioning between control angles |
US8508166B2 (en) * | 2009-08-10 | 2013-08-13 | Emerson Climate Technologies, Inc. | Power factor correction with variable bus voltage |
US8493014B2 (en) * | 2009-08-10 | 2013-07-23 | Emerson Climate Technologies, Inc. | Controller and method for estimating, managing, and diagnosing motor parameters |
US8476873B2 (en) * | 2009-08-10 | 2013-07-02 | Emerson Climate Technologies, Inc. | System and method for current balancing |
US8395329B2 (en) * | 2009-09-09 | 2013-03-12 | Bel Fuse (Macao Commercial Offshore) | LED ballast power supply having digital controller |
US9155174B2 (en) | 2009-09-30 | 2015-10-06 | Cirrus Logic, Inc. | Phase control dimming compatible lighting systems |
US9178415B1 (en) | 2009-10-15 | 2015-11-03 | Cirrus Logic, Inc. | Inductor over-current protection using a volt-second value representing an input voltage to a switching power converter |
US8487591B1 (en) | 2009-12-31 | 2013-07-16 | Cirrus Logic, Inc. | Power control system with power drop out immunity and uncompromised startup time |
CA2782871C (en) * | 2009-11-02 | 2019-02-12 | Genesys Systems, Llc | Electronic ballast circuit for lamps |
US8654483B2 (en) | 2009-11-09 | 2014-02-18 | Cirrus Logic, Inc. | Power system having voltage-based monitoring for over current protection |
US8248040B2 (en) * | 2009-11-12 | 2012-08-21 | Polar Semiconductor Inc. | Time-limiting mode (TLM) for an interleaved power factor correction (PFC) converter |
JP5170117B2 (en) * | 2010-01-18 | 2013-03-27 | 株式会社村田製作所 | Switching control circuit and switching power supply device |
JP4958052B2 (en) * | 2010-02-24 | 2012-06-20 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | System power leveling apparatus and diagnostic imaging system |
US8638079B2 (en) * | 2010-02-27 | 2014-01-28 | Infineon Technologies Ag | Pulse modulation control in a DC-DC converter circuit |
CN103391006A (en) | 2012-05-11 | 2013-11-13 | 凹凸电子(武汉)有限公司 | Light source driving circuit and controller and method for controlling power converter |
US8698419B2 (en) | 2010-03-04 | 2014-04-15 | O2Micro, Inc. | Circuits and methods for driving light sources |
US8456095B2 (en) | 2010-03-19 | 2013-06-04 | Active-Semi, Inc. | Reduced flicker AC LED lamp with separately shortable sections of an LED string |
US8299724B2 (en) * | 2010-03-19 | 2012-10-30 | Active-Semi, Inc. | AC LED lamp involving an LED string having separately shortable sections |
CN101807851B (en) * | 2010-03-29 | 2012-07-25 | 北京新雷能科技股份有限公司 | Switch power supply load disturbance feedforward control circuit |
GB201006395D0 (en) | 2010-04-16 | 2010-06-02 | Dyson Technology Ltd | Control of a brushless motor |
GB201006398D0 (en) | 2010-04-16 | 2010-06-02 | Dyson Technology Ltd | Control of a brushless motor |
GB201006387D0 (en) * | 2010-04-16 | 2010-06-02 | Dyson Technology Ltd | Control of a brushless motor |
GB201006396D0 (en) | 2010-04-16 | 2010-06-02 | Dyson Technology Ltd | Control of a brushless motor |
GB201006391D0 (en) | 2010-04-16 | 2010-06-02 | Dyson Technology Ltd | Control of a brushless permanent-magnet motor |
GB201006390D0 (en) | 2010-04-16 | 2010-06-02 | Dyson Technology Ltd | Control of a brushless motor |
GB201006386D0 (en) | 2010-04-16 | 2010-06-02 | Dyson Technology Ltd | Control of a brushless motor |
GB201006392D0 (en) | 2010-04-16 | 2010-06-02 | Dyson Technology Ltd | Controller for a brushless motor |
GB201006397D0 (en) | 2010-04-16 | 2010-06-02 | Dyson Technology Ltd | Control of a brushless motor |
GB201006388D0 (en) | 2010-04-16 | 2010-06-02 | Dyson Technology Ltd | Control of brushless motor |
US9099961B2 (en) * | 2010-04-19 | 2015-08-04 | Rf Micro Devices, Inc. | Output impedance compensation of a pseudo-envelope follower power management system |
US9431974B2 (en) | 2010-04-19 | 2016-08-30 | Qorvo Us, Inc. | Pseudo-envelope following feedback delay compensation |
CN102971962B (en) * | 2010-04-19 | 2016-05-25 | 射频小型装置公司 | Pseudo-envelope following power management system |
US8633766B2 (en) | 2010-04-19 | 2014-01-21 | Rf Micro Devices, Inc. | Pseudo-envelope follower power management system with high frequency ripple current compensation |
US8981848B2 (en) | 2010-04-19 | 2015-03-17 | Rf Micro Devices, Inc. | Programmable delay circuitry |
US8269422B2 (en) * | 2010-04-20 | 2012-09-18 | Chien-Chih Kuo | Output controllable frequency modulation electronic ballast |
US20120106216A1 (en) * | 2010-04-29 | 2012-05-03 | Victor Tzinker | Ac-dc converter with unity power factor |
US9173257B2 (en) * | 2010-05-11 | 2015-10-27 | Victor M. CUBIAS | Low voltage LED dimmer with integrated universal switch mode power supply |
EP2388902B1 (en) * | 2010-05-21 | 2013-08-14 | C.R.F. Società Consortile per Azioni | System and method for digital control of a DC/DC power-converter device, in particular for automotive applications |
BRPI1006472B1 (en) * | 2010-06-04 | 2019-08-20 | Opulent Electronics International Pte Ltd. | DEVICE FOR PROVIDING ELECTRIC CURRENCY AT LEAST ONE LED (LIGHT) THROUGH A POWER CONVERTER IN THE MODE OF SWITCHING AND METHOD FOR PROVIDING ELECTRIC CURRENCY AT LEAST ONE THROUGH THERE ONLY Switching Mode |
US8417196B2 (en) * | 2010-06-07 | 2013-04-09 | Skyworks Solutions, Inc. | Apparatus and method for directional coupling |
TWI414923B (en) * | 2010-07-07 | 2013-11-11 | Sitronix Technology Corp | Power factor correction circuit |
US8111017B2 (en) | 2010-07-12 | 2012-02-07 | O2Micro, Inc | Circuits and methods for controlling dimming of a light source |
US8467209B2 (en) * | 2010-07-27 | 2013-06-18 | Stmicroelectronics S.R.L. | Control device of a switching power supply |
US10439508B2 (en) | 2010-07-27 | 2019-10-08 | Stmicroelectronics S.R.L. | Control device of a switching power supply |
US8536799B1 (en) | 2010-07-30 | 2013-09-17 | Cirrus Logic, Inc. | Dimmer detection |
WO2012016197A1 (en) | 2010-07-30 | 2012-02-02 | Cirrus Logic, Inc. | Powering high-efficiency lighting devices from a triac-based dimmer |
US8729811B2 (en) | 2010-07-30 | 2014-05-20 | Cirrus Logic, Inc. | Dimming multiple lighting devices by alternating energy transfer from a magnetic storage element |
US8569972B2 (en) * | 2010-08-17 | 2013-10-29 | Cirrus Logic, Inc. | Dimmer output emulation |
US8941316B2 (en) | 2010-08-17 | 2015-01-27 | Cirrus Logic, Inc. | Duty factor probing of a triac-based dimmer |
US8912781B2 (en) | 2010-07-30 | 2014-12-16 | Cirrus Logic, Inc. | Integrated circuit switching power supply controller with selectable buck mode operation |
US8866452B1 (en) | 2010-08-11 | 2014-10-21 | Cirrus Logic, Inc. | Variable minimum input voltage based switching in an electronic power control system |
US9307601B2 (en) | 2010-08-17 | 2016-04-05 | Koninklijke Philips N.V. | Input voltage sensing for a switching power converter and a triac-based dimmer |
CN105703617A (en) * | 2010-08-18 | 2016-06-22 | 芬斯克斯有限公司 | Multi-path power factor correction method and power converter |
JP5079855B2 (en) * | 2010-08-24 | 2012-11-21 | シャープ株式会社 | LED drive circuit and LED illumination lamp using the same |
EP2609790A2 (en) | 2010-08-24 | 2013-07-03 | Cirrus Logic, Inc. | Multi-mode dimmer interfacing including attach state control |
US9510401B1 (en) | 2010-08-24 | 2016-11-29 | Cirrus Logic, Inc. | Reduced standby power in an electronic power control system |
US9954436B2 (en) | 2010-09-29 | 2018-04-24 | Qorvo Us, Inc. | Single μC-buckboost converter with multiple regulated supply outputs |
US8754625B2 (en) | 2010-09-30 | 2014-06-17 | Intersil Americas Inc. | System and method for converting an AC input voltage to regulated output current |
GB2484289B (en) | 2010-10-04 | 2013-11-20 | Dyson Technology Ltd | Control of an electrical machine |
KR101179327B1 (en) * | 2010-10-12 | 2012-09-03 | 서울시립대학교 산학협력단 | Power factor correction circuit |
JP5760169B2 (en) * | 2010-10-25 | 2015-08-05 | パナソニックIpマネジメント株式会社 | Lighting device and lighting apparatus using the same |
CN103262399B (en) | 2010-11-04 | 2017-02-15 | 皇家飞利浦有限公司 | Method and device for controlling energy dissipation in switch power converter |
EP2636134A2 (en) | 2010-11-04 | 2013-09-11 | Cirrus Logic, Inc. | Switching power converter input voltage approximate zero crossing determination |
WO2012061774A2 (en) | 2010-11-04 | 2012-05-10 | Cirrus Logic, Inc. | Controlled energy dissipation in a switching power converter |
US8552893B1 (en) * | 2010-11-04 | 2013-10-08 | Cirrus Logic, Inc. | Control system using nonlinear delta-sigma modulator with switching period error compensation |
EP2451062B1 (en) * | 2010-11-08 | 2018-10-24 | Nxp B.V. | PFC with multi-channel error feedback |
US8547034B2 (en) | 2010-11-16 | 2013-10-01 | Cirrus Logic, Inc. | Trailing edge dimmer compatibility with dimmer high resistance prediction |
WO2012068260A1 (en) | 2010-11-16 | 2012-05-24 | Rf Micro Devices, Inc. | Digital gain multiplier for envelop tracking systems and corresponding method |
JP5487084B2 (en) * | 2010-11-19 | 2014-05-07 | 株式会社メガチップス | Power supply |
US8541990B2 (en) * | 2010-11-23 | 2013-09-24 | Immense Advance Technology Corp. | Power conversion controller having a novel power factor correction mechanism using line voltage normalization |
US20120139442A1 (en) * | 2010-12-07 | 2012-06-07 | Astec International Limited | Mains Dimmable LED Driver Circuits |
CN103370990B (en) | 2010-12-16 | 2016-06-15 | 皇家飞利浦有限公司 | Based on the discontinuous mode-critical conduction mode conversion of switch parameter |
US8878389B2 (en) | 2011-01-11 | 2014-11-04 | Schneider Electric It Corporation | Method and apparatus for providing uninterruptible power |
JP2012157220A (en) * | 2011-01-28 | 2012-08-16 | Sony Corp | Controller, control method and power supply |
CN102364857B (en) * | 2011-02-01 | 2012-12-12 | 杭州士兰微电子股份有限公司 | Primary side constant current switching power controller and method |
US8624760B2 (en) | 2011-02-07 | 2014-01-07 | Rf Micro Devices, Inc. | Apparatuses and methods for rate conversion and fractional delay calculation using a coefficient look up table |
US8942313B2 (en) | 2011-02-07 | 2015-01-27 | Rf Micro Devices, Inc. | Group delay calibration method for power amplifier envelope tracking |
US8450946B1 (en) * | 2011-02-07 | 2013-05-28 | Universal Lighting Technologies, Inc. | Zone addressing circuit for an electronic ballast |
JP5774904B2 (en) * | 2011-02-08 | 2015-09-09 | ローム株式会社 | Power factor correction circuit and its control circuit, and electronic equipment using them |
WO2012109536A2 (en) * | 2011-02-10 | 2012-08-16 | Power-One, Inc. | Input current shaping for transition and discontinuous mode power converter |
CN102368662B (en) * | 2011-03-10 | 2013-11-27 | 杭州士兰微电子股份有限公司 | Current reference generation circuit, constant current switch power supply control circuit and control method thereof |
WO2012149430A1 (en) * | 2011-04-27 | 2012-11-01 | Todd Shudarek | Combined active and passive harmonic mitigation devices and applications thereof |
US9379667B2 (en) | 2011-05-05 | 2016-06-28 | Rf Micro Devices, Inc. | Multiple power supply input parallel amplifier based envelope tracking |
US9246460B2 (en) | 2011-05-05 | 2016-01-26 | Rf Micro Devices, Inc. | Power management architecture for modulated and constant supply operation |
US9247496B2 (en) | 2011-05-05 | 2016-01-26 | Rf Micro Devices, Inc. | Power loop control based envelope tracking |
US8933642B2 (en) | 2011-05-13 | 2015-01-13 | General Electric Company | Dimmable LED lamp |
CN103748794B (en) | 2011-05-31 | 2015-09-16 | 射频小型装置公司 | A kind of method and apparatus of the complex gain for measuring transmission path |
US9019011B2 (en) | 2011-06-01 | 2015-04-28 | Rf Micro Devices, Inc. | Method of power amplifier calibration for an envelope tracking system |
EP2716135A1 (en) | 2011-06-03 | 2014-04-09 | Cirrus Logic, Inc. | Primary-side control of a switching power converter with feed forward delay compensation |
EP2715924A1 (en) * | 2011-06-03 | 2014-04-09 | Cirrus Logic, Inc. | Control data determination from primary-side sensing of a secondary-side voltage in a switching power converter |
WO2012177729A1 (en) | 2011-06-20 | 2012-12-27 | Amerlux, Llc | Led driver |
US8760228B2 (en) | 2011-06-24 | 2014-06-24 | Rf Micro Devices, Inc. | Differential power management and power amplifier architecture |
CN103636105B (en) | 2011-06-30 | 2017-05-10 | 飞利浦照明控股有限公司 | Transformer-isolated LED lighting circuit with secondary-side dimming control |
US8593075B1 (en) | 2011-06-30 | 2013-11-26 | Cirrus Logic, Inc. | Constant current controller with selectable gain |
JP5811329B2 (en) * | 2011-07-08 | 2015-11-11 | 東芝ライテック株式会社 | Power supply |
US8952710B2 (en) | 2011-07-15 | 2015-02-10 | Rf Micro Devices, Inc. | Pulsed behavior modeling with steady state average conditions |
WO2013012787A2 (en) | 2011-07-15 | 2013-01-24 | Rf Micro Devices, Inc. | Modified switching ripple for envelope tracking system |
TWI460571B (en) * | 2011-07-19 | 2014-11-11 | Acbel Polytech Inc | Power factor control circuit and its control method |
US9263996B2 (en) | 2011-07-20 | 2016-02-16 | Rf Micro Devices, Inc. | Quasi iso-gain supply voltage function for envelope tracking systems |
US8971065B2 (en) * | 2011-08-04 | 2015-03-03 | Industrial Technology Research Institute | System for providing an alternating current, and control apparatus and method thereof |
CN102946195B (en) | 2011-08-15 | 2016-04-20 | 美国亚德诺半导体公司 | Switching regulaor and control method thereof |
US8624576B2 (en) | 2011-08-17 | 2014-01-07 | Rf Micro Devices, Inc. | Charge-pump system for providing independent voltages |
US8884464B2 (en) | 2011-08-29 | 2014-11-11 | Schneider Electric It Corporation | Twin boost converter with integrated charger for UPS system |
CN103858338B (en) | 2011-09-02 | 2016-09-07 | 射频小型装置公司 | Separation VCC and common VCC power management framework for envelope-tracking |
US20130057229A1 (en) * | 2011-09-02 | 2013-03-07 | Intersil Americas Inc. | Power factor correction apparatus and method |
KR101288201B1 (en) * | 2011-09-16 | 2013-07-18 | 삼성전기주식회사 | Power factor correction circuit, power supply having thereof and motor driver |
US8736246B2 (en) * | 2011-09-22 | 2014-05-27 | Acbel Polytech Inc. | Power factor control circuit and power factor control method |
US9190899B2 (en) * | 2011-09-28 | 2015-11-17 | General Electric Company | Power factor correction (PFC) circuit configured to control high pulse load current and inrush current |
US8957728B2 (en) | 2011-10-06 | 2015-02-17 | Rf Micro Devices, Inc. | Combined filter and transconductance amplifier |
CN103959189B (en) | 2011-10-26 | 2015-12-23 | 射频小型装置公司 | Based on the parallel amplifier phase compensation of inductance |
US9024688B2 (en) | 2011-10-26 | 2015-05-05 | Rf Micro Devices, Inc. | Dual parallel amplifier based DC-DC converter |
WO2013063364A1 (en) | 2011-10-26 | 2013-05-02 | Rf Micro Devices, Inc. | Average frequency control of switcher for envelope tracking |
US9484797B2 (en) | 2011-10-26 | 2016-11-01 | Qorvo Us, Inc. | RF switching converter with ripple correction |
DE102011085547B4 (en) * | 2011-11-02 | 2021-07-22 | Robert Bosch Gmbh | Device and method for correcting a sensor signal |
EP2774014A4 (en) * | 2011-11-04 | 2015-08-26 | Zbb Energy Corp | System and method for power conversion for renewable energy sources |
SG189603A1 (en) * | 2011-11-04 | 2013-05-31 | Opulent Electronics Internat Pte Ltd | System for driving a plurality of high powered led units |
TWI484739B (en) * | 2011-11-11 | 2015-05-11 | Richtek Technology Corp | Active power factor correction circuit and related pfc controller |
US9065330B1 (en) * | 2011-11-15 | 2015-06-23 | Marvell International Ltd. | Method and apparatus for controlling TRIAC dimmable device |
US9250643B2 (en) | 2011-11-30 | 2016-02-02 | Rf Micro Devices, Inc. | Using a switching signal delay to reduce noise from a switching power supply |
US9515621B2 (en) | 2011-11-30 | 2016-12-06 | Qorvo Us, Inc. | Multimode RF amplifier system |
US8975959B2 (en) | 2011-11-30 | 2015-03-10 | Rf Micro Devices, Inc. | Monotonic conversion of RF power amplifier calibration data |
US9280163B2 (en) | 2011-12-01 | 2016-03-08 | Rf Micro Devices, Inc. | Average power tracking controller |
US9256234B2 (en) | 2011-12-01 | 2016-02-09 | Rf Micro Devices, Inc. | Voltage offset loop for a switching controller |
US8947161B2 (en) | 2011-12-01 | 2015-02-03 | Rf Micro Devices, Inc. | Linear amplifier power supply modulation for envelope tracking |
WO2013082384A1 (en) | 2011-12-01 | 2013-06-06 | Rf Micro Devices, Inc. | Rf power converter |
US9041365B2 (en) | 2011-12-01 | 2015-05-26 | Rf Micro Devices, Inc. | Multiple mode RF power converter |
US9494962B2 (en) | 2011-12-02 | 2016-11-15 | Rf Micro Devices, Inc. | Phase reconfigurable switching power supply |
US8823346B2 (en) * | 2011-12-09 | 2014-09-02 | Intersil Americas LLC | System and method of feed forward for boost converters with improved power factor and reduced energy storage |
US10117295B2 (en) | 2013-01-24 | 2018-10-30 | Cree, Inc. | LED lighting apparatus for use with AC-output lighting ballasts |
CN102497705B (en) * | 2011-12-14 | 2014-04-02 | 西安华雷船舶实业有限公司 | Lamp energy conservation control method and energy-conservation circuit thereof |
EP2792060A2 (en) | 2011-12-14 | 2014-10-22 | Cirrus Logic, Inc. | Adaptive current control timing and responsive current control for interfacing with a dimmer |
US9813036B2 (en) | 2011-12-16 | 2017-11-07 | Qorvo Us, Inc. | Dynamic loadline power amplifier with baseband linearization |
CN104137105B (en) | 2011-12-22 | 2017-07-11 | 施耐德电气It公司 | Impact analysis on temporal event to the temperature in data center |
AU2011383606A1 (en) | 2011-12-22 | 2014-07-17 | Schneider Electric It Corporation | System and method for prediction of temperature values in an electronics system |
US9496782B2 (en) | 2011-12-22 | 2016-11-15 | B/E Aerospace, Inc. | Digitally-controlled power factor correction circuits, methods and articles of manufacture |
US9298198B2 (en) | 2011-12-28 | 2016-03-29 | Rf Micro Devices, Inc. | Noise reduction for envelope tracking |
CA2850554C (en) * | 2011-12-31 | 2019-04-02 | Broad-Ocean Motor Ev Co., Ltd | Narrow pulse filter circuit with automatic compensation and motor controller applying same |
TWI542127B (en) | 2012-01-03 | 2016-07-11 | 財團法人工業技術研究院 | Active buck power factor correction device |
WO2013102780A1 (en) * | 2012-01-05 | 2013-07-11 | American Power Conversion Corporation | Power converter with digital current control circuit |
US8847510B2 (en) * | 2012-01-20 | 2014-09-30 | Luxul Technology Incorporation | LED AC driving circuit capable of adjusting operating voltage |
TW201332396A (en) * | 2012-01-20 | 2013-08-01 | Phihong Technology Co Ltd | Power supply circuit for driving light emitting diode |
ITMI20120088A1 (en) | 2012-01-26 | 2013-07-27 | Dora Spa | CONTROL DEVICE FOR A SWITCHING FEEDER. |
ITMI20120089A1 (en) * | 2012-01-26 | 2013-07-27 | Dora Spa | CONTROL DEVICE FOR A SWITCHING FEEDER. |
US9356534B1 (en) * | 2012-01-27 | 2016-05-31 | Marvell International Ltd. | Method and apparatus for turning on a lighting device |
US8937818B2 (en) * | 2012-02-03 | 2015-01-20 | Sheikh Mohammad Ahsanuzzaman | Low-volume programmable-output PFC rectifier with dynamic efficiency and transient response optimization |
WO2013126836A1 (en) | 2012-02-22 | 2013-08-29 | Cirrus Logic, Inc. | Mixed load current compensation for led lighting |
CN102714464B (en) * | 2012-02-29 | 2014-04-02 | 深圳市核达中远通电源技术有限公司 | A multi-input DC converter and a PFC circuit |
JP2013186944A (en) | 2012-03-05 | 2013-09-19 | Toshiba Lighting & Technology Corp | Power supply for illumination, and illuminating fixture |
US9155139B2 (en) | 2012-03-09 | 2015-10-06 | Rockwell Automation Technologies, Inc. | LED driver circuits and methods |
US8488352B1 (en) * | 2012-03-27 | 2013-07-16 | Chicony Power Technology Co., Ltd. | Method for varying power factor |
TWI489743B (en) * | 2012-03-28 | 2015-06-21 | 大同股份有限公司 | Power source sampling apparatus and sampling method thereof |
DE102012007479A1 (en) * | 2012-04-13 | 2013-10-17 | Tridonic Gmbh & Co. Kg | A method of controlling a power factor correction circuit, power factor correction circuit, and lighting device driver |
US9634593B2 (en) | 2012-04-26 | 2017-04-25 | Emerson Climate Technologies, Inc. | System and method for permanent magnet motor control |
RU2525837C2 (en) * | 2012-04-28 | 2014-08-20 | Закрытое акционерное общество "Связь инжиниринг" | Method and system to control bridgeless corrector of power ratio by means of digital signal processor |
US8848402B2 (en) * | 2012-05-25 | 2014-09-30 | Chicony Power Technology Co., Ltd. | Power factor correction apparatus |
US8981839B2 (en) | 2012-06-11 | 2015-03-17 | Rf Micro Devices, Inc. | Power source multiplexer |
JP2014011925A (en) * | 2012-07-02 | 2014-01-20 | Omron Automotive Electronics Co Ltd | Charger |
US9520794B2 (en) | 2012-07-25 | 2016-12-13 | Philips Lighting Holding B.V | Acceleration of output energy provision for a load during start-up of a switching power converter |
CN104662792B (en) | 2012-07-26 | 2017-08-08 | Qorvo美国公司 | Programmable RF notch filters for envelope-tracking |
EP2883302B1 (en) | 2012-08-10 | 2020-09-30 | Emerson Climate Technologies, Inc. | Motor drive control using pulse-width modulation pulse skipping |
US9184661B2 (en) | 2012-08-27 | 2015-11-10 | Cirrus Logic, Inc. | Power conversion with controlled capacitance charging including attach state control |
US9131571B2 (en) | 2012-09-14 | 2015-09-08 | Cree, Inc. | Solid-state lighting apparatus and methods using energy storage with segment control |
US9225231B2 (en) | 2012-09-14 | 2015-12-29 | Rf Micro Devices, Inc. | Open loop ripple cancellation circuit in a DC-DC converter |
TW201415780A (en) * | 2012-10-03 | 2014-04-16 | Inno Tech Co Ltd | Synchronous rectification boosting and step-down converter |
US9197256B2 (en) | 2012-10-08 | 2015-11-24 | Rf Micro Devices, Inc. | Reducing effects of RF mixer-based artifact using pre-distortion of an envelope power supply signal |
US9141123B2 (en) * | 2012-10-16 | 2015-09-22 | Volterra Semiconductor LLC | Maximum power point tracking controllers and associated systems and methods |
WO2014062902A1 (en) | 2012-10-18 | 2014-04-24 | Rf Micro Devices, Inc | Transitioning from envelope tracking to average power tracking |
US9484805B2 (en) * | 2012-10-31 | 2016-11-01 | Cree, Inc. | Dual mode power supply controller with current regulation |
US9509215B2 (en) | 2012-10-31 | 2016-11-29 | Cree, Inc. | Dual mode power supply controller with charge balance multipliers and charge balance multiplier circuits |
US9203307B2 (en) | 2012-10-31 | 2015-12-01 | Cree, Inc. | Power converter with bias voltage regulation circuit |
KR101321236B1 (en) * | 2012-11-01 | 2013-10-28 | 명지대학교 산학협력단 | Output voltage ripple compensator of power factor correction converter and battery charging device for electric vehicle using thereof |
US9627975B2 (en) | 2012-11-16 | 2017-04-18 | Qorvo Us, Inc. | Modulated power supply system and method with automatic transition between buck and boost modes |
CN102946254B (en) * | 2012-12-13 | 2015-05-27 | 成都芯源系统有限公司 | Digital controller and digit control method of multiphase switch convertor |
KR101367954B1 (en) * | 2012-12-21 | 2014-02-26 | 삼성전기주식회사 | Switching mode power supply and switching controlling circuit thereof |
KR101422959B1 (en) * | 2012-12-21 | 2014-08-13 | 삼성전기주식회사 | Power factor correction apparatus and power supplying apparatus |
EP2936688B1 (en) * | 2012-12-21 | 2017-05-03 | Teledyne Dalsa B.V. | Sigma-delta analog-to-digital converter |
US9413251B2 (en) * | 2013-01-15 | 2016-08-09 | Rohm Co., Ltd. | Power delivery device, AC adapter, electronic apparatus and power delivery system, having variable function of output voltage value and available output current capacity |
US10045406B2 (en) * | 2013-01-24 | 2018-08-07 | Cree, Inc. | Solid-state lighting apparatus for use with fluorescent ballasts |
US9929696B2 (en) | 2013-01-24 | 2018-03-27 | Qorvo Us, Inc. | Communications based adjustments of an offset capacitive voltage |
US10104723B2 (en) | 2013-01-24 | 2018-10-16 | Cree, Inc. | Solid-state lighting apparatus with filament imitation for use with florescent ballasts |
US9496844B1 (en) | 2013-01-25 | 2016-11-15 | Koninklijke Philips N.V. | Variable bandwidth filter for dimmer phase angle measurements |
US9059793B2 (en) * | 2013-01-28 | 2015-06-16 | Qualcomm Incorporated | Noise shaping for switching circuitry |
US9178472B2 (en) | 2013-02-08 | 2015-11-03 | Rf Micro Devices, Inc. | Bi-directional power supply signal based linear amplifier |
JP6088851B2 (en) * | 2013-02-25 | 2017-03-01 | 株式会社東芝 | Inverter control circuit and inverter circuit |
TWI489243B (en) * | 2013-03-05 | 2015-06-21 | Richtek Technology Corp | Power managing ic, control method and signal peak detector and method of pfc converter |
WO2014138629A1 (en) | 2013-03-07 | 2014-09-12 | Cirrus Logic, Inc. | Utilizing secondary-side conduction time parameters of a switching power converter to provide energy to a load |
US9166485B2 (en) | 2013-03-11 | 2015-10-20 | Cirrus Logic, Inc. | Quantization error reduction in constant output current control drivers |
EP2974540B1 (en) * | 2013-03-11 | 2019-08-07 | Signify Holding B.V. | Reduction of supply current variations using compensation current control |
US9661697B2 (en) * | 2013-03-14 | 2017-05-23 | Laurence P. Sadwick | Digital dimmable driver |
US10187934B2 (en) | 2013-03-14 | 2019-01-22 | Philips Lighting Holding B.V. | Controlled electronic system power dissipation via an auxiliary-power dissipation circuit |
US9197162B2 (en) | 2013-03-14 | 2015-11-24 | Rf Micro Devices, Inc. | Envelope tracking power supply voltage dynamic range reduction |
US9203353B2 (en) | 2013-03-14 | 2015-12-01 | Rf Micro Devices, Inc. | Noise conversion gain limited RF power amplifier |
US9282598B2 (en) | 2013-03-15 | 2016-03-08 | Koninklijke Philips N.V. | System and method for learning dimmer characteristics |
US9142657B2 (en) * | 2013-03-15 | 2015-09-22 | David Schie | Gated thyristor power device |
US9391497B2 (en) | 2013-04-03 | 2016-07-12 | Trane International Inc. | Electric motors having modular construction, power sharing and performance configurability |
US9853539B1 (en) | 2013-04-08 | 2017-12-26 | Cirrus Logic, Inc. | Systems and methods for measuring inductor current in a switching DC-to-DC converter |
US9461537B1 (en) | 2013-04-15 | 2016-10-04 | Cirrus Logic, Inc. | Systems and methods for measuring inductor current in a switching DC-to-DC converter |
US9479118B2 (en) | 2013-04-16 | 2016-10-25 | Rf Micro Devices, Inc. | Dual instantaneous envelope tracking |
TWI462442B (en) * | 2013-04-26 | 2014-11-21 | Richtek Technology Corp | Control circuit for power converter and related control method |
CN103236779B (en) * | 2013-04-27 | 2015-11-18 | 四川长虹电器股份有限公司 | A kind of transistor control method, device and air-conditioning system |
US9214855B2 (en) | 2013-05-03 | 2015-12-15 | Cooper Technologies Company | Active power factor correction circuit for a constant current power converter |
US9190901B2 (en) | 2013-05-03 | 2015-11-17 | Cooper Technologies Company | Bridgeless boost power factor correction circuit for constant current input |
US9000736B2 (en) * | 2013-05-03 | 2015-04-07 | Cooper Technologies Company | Power factor correction algorithm for arbitrary input waveform |
US9548794B2 (en) | 2013-05-03 | 2017-01-17 | Cooper Technologies Company | Power factor correction for constant current input with power line communication |
CN104143901B (en) * | 2013-05-06 | 2017-03-15 | 立锜科技股份有限公司 | The control method of the control circuit and correlation of power supply changeover device |
WO2014186776A1 (en) | 2013-05-17 | 2014-11-20 | Cirrus Logic, Inc. | Charge pump-based circuitry for bjt power supply |
WO2014186765A1 (en) | 2013-05-17 | 2014-11-20 | Cirrus Logic, Inc. | Single pin control of bipolar junction transistor (bjt)-based power stage |
TWI506393B (en) * | 2013-05-17 | 2015-11-01 | Macroblock Inc | Load energy control circuit for a variable load and load energy control method using the same |
DE112014002478B4 (en) * | 2013-06-21 | 2023-12-07 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Device and method for charging a vehicle battery from the power grid |
CN103390995B (en) * | 2013-07-18 | 2015-09-30 | 矽力杰半导体技术(杭州)有限公司 | A kind of pfc circuit |
WO2015017317A2 (en) | 2013-07-29 | 2015-02-05 | Cirrus Logic, Inc. | Two terminal drive of bipolar junction transistor (bjt) for switch-mode operation of a light emitting diode (led)-based bulb |
US9504106B2 (en) | 2013-07-29 | 2016-11-22 | Cirrus Logic, Inc. | Compensating for a reverse recovery time period of a bipolar junction transistor (BJT) in switch-mode operation of a light-emitting diode (LED)-based bulb |
US9374005B2 (en) | 2013-08-13 | 2016-06-21 | Rf Micro Devices, Inc. | Expanded range DC-DC converter |
US10707038B2 (en) | 2013-09-06 | 2020-07-07 | Texas Instruments Incorporated | System and method for energy monitoring |
TWI508423B (en) * | 2013-09-06 | 2015-11-11 | Richtek Technology Corp | Power conversion device |
US9728974B2 (en) * | 2013-10-10 | 2017-08-08 | Tmeic Corporation | Renewable energy site reactive power control |
WO2015075508A1 (en) | 2013-11-25 | 2015-05-28 | Freescale Semiconductor, Inc. | A flyback switching mode power supply with voltage control and a method thereof |
US9716466B2 (en) * | 2014-01-23 | 2017-07-25 | Lg Electronics Inc. | Power conversion apparatus, photovoltaic module and communication device and photovoltaic system including the same |
JP6020489B2 (en) * | 2014-02-27 | 2016-11-02 | トヨタ自動車株式会社 | Boost converter and control method thereof |
KR102187845B1 (en) | 2014-02-28 | 2020-12-07 | 주식회사 실리콘웍스 | Switching device and driving method thereof |
US9621062B2 (en) | 2014-03-07 | 2017-04-11 | Philips Lighting Holding B.V. | Dimmer output emulation with non-zero glue voltage |
EP2919374B1 (en) * | 2014-03-12 | 2018-05-02 | DET International Holding Limited | Duty-ratio controller |
DE102014205520A1 (en) * | 2014-03-25 | 2015-10-01 | Tridonic Gmbh & Co Kg | Power Factor Correction Circuit (PFC) with THD Correction |
US20150288275A1 (en) * | 2014-04-08 | 2015-10-08 | Ionel Jitaru | Input Current Distortion for Minimization of Bulk Capacitor |
US9215772B2 (en) | 2014-04-17 | 2015-12-15 | Philips International B.V. | Systems and methods for minimizing power dissipation in a low-power lamp coupled to a trailing-edge dimmer |
US9214862B2 (en) | 2014-04-17 | 2015-12-15 | Philips International, B.V. | Systems and methods for valley switching in a switching power converter |
US10126870B2 (en) * | 2014-06-03 | 2018-11-13 | Synaptics Incorporated | Techniques for mitigating noise in capacitive sensing devices |
CN105207552B (en) * | 2014-06-06 | 2018-02-09 | 台达电子工业股份有限公司 | Multiphase generator power conversion system and its operating method |
US10177646B2 (en) * | 2014-06-13 | 2019-01-08 | City University Of Hong Kong | Power factor correction circuit for a power electronic system |
US9385601B2 (en) * | 2014-06-30 | 2016-07-05 | Monolithic Power Systems Co., Ltd. | SMPS with output ripple reduction control and method thereof |
US9614476B2 (en) | 2014-07-01 | 2017-04-04 | Qorvo Us, Inc. | Group delay calibration of RF envelope tracking |
DE102014214490A1 (en) * | 2014-07-24 | 2016-01-28 | Robert Bosch Gmbh | Switching converter and method for converting an input voltage into an output voltage |
FR3024304B1 (en) * | 2014-07-25 | 2018-03-02 | Somfy Sas | METHOD AND UNIT FOR MONITORING AND / OR PROTECTING A ACTUATOR OF A MOBILE EQUIPMENT OF A BUILDING |
CN105450052B (en) * | 2014-08-20 | 2018-03-30 | 台达电子工业股份有限公司 | Converter, controller and control method |
US20160065046A1 (en) * | 2014-08-29 | 2016-03-03 | John Alan GIBSON | Method and circuits for diminishing dc offset |
CN107078643B (en) * | 2014-10-11 | 2019-12-31 | 德克萨斯仪器股份有限公司 | Pre-biased start-up of a converter |
JP2016086616A (en) * | 2014-10-29 | 2016-05-19 | 株式会社アイケイエス | Power converter |
US9325236B1 (en) | 2014-11-12 | 2016-04-26 | Koninklijke Philips N.V. | Controlling power factor in a switching power converter operating in discontinuous conduction mode |
US9504118B2 (en) | 2015-02-17 | 2016-11-22 | Cirrus Logic, Inc. | Resistance measurement of a resistor in a bipolar junction transistor (BJT)-based power stage |
JP6445348B2 (en) * | 2015-02-24 | 2018-12-26 | ルネサスエレクトロニクス株式会社 | Semiconductor device and control method thereof |
US9609701B2 (en) | 2015-02-27 | 2017-03-28 | Cirrus Logic, Inc. | Switch-mode drive sensing of reverse recovery in bipolar junction transistor (BJT)-based power converters |
US9603206B2 (en) | 2015-02-27 | 2017-03-21 | Cirrus Logic, Inc. | Detection and control mechanism for tail current in a bipolar junction transistor (BJT)-based power stage |
US9722487B2 (en) * | 2015-05-11 | 2017-08-01 | Infineon Technologies Ag | Hysteresis controllers for power factor correction in AC/DC power converters |
CN107836137B (en) * | 2015-06-12 | 2019-11-12 | 贝盖利股份有限公司 | Multifunction electronic power supply for LED light device |
US9912297B2 (en) | 2015-07-01 | 2018-03-06 | Qorvo Us, Inc. | Envelope tracking power converter circuitry |
US9941844B2 (en) | 2015-07-01 | 2018-04-10 | Qorvo Us, Inc. | Dual-mode envelope tracking power converter circuitry |
EP3139484B1 (en) * | 2015-09-03 | 2018-05-23 | Nxp B.V. | A mains power converter, a controller therefor, and methods of operating the same |
US10164520B2 (en) | 2015-09-03 | 2018-12-25 | Aerojet Rocketdyne | Short circuit protection for switching power converters |
JP2017070004A (en) * | 2015-09-28 | 2017-04-06 | ルネサスエレクトロニクス株式会社 | Semiconductor device |
US9806610B2 (en) * | 2015-09-30 | 2017-10-31 | Texas Instruments Incorporated | Noise-shaped power converters |
TWI595342B (en) * | 2016-03-22 | 2017-08-11 | 台達電子工業股份有限公司 | Controlling module, switch mode power supply apparatus, and peak current mode controlling method of a switch mode power supply apparatus |
CN107222088B (en) * | 2016-03-22 | 2019-10-15 | 台达电子工业股份有限公司 | Control module, switching power supply device and peak-current mode control method |
US10530372B1 (en) | 2016-03-25 | 2020-01-07 | MY Tech, LLC | Systems and methods for digital synthesis of output signals using resonators |
US10020818B1 (en) | 2016-03-25 | 2018-07-10 | MY Tech, LLC | Systems and methods for fast delta sigma modulation using parallel path feedback loops |
US10656026B2 (en) | 2016-04-15 | 2020-05-19 | Emerson Climate Technologies, Inc. | Temperature sensing circuit for transmitting data across isolation barrier |
US10277115B2 (en) | 2016-04-15 | 2019-04-30 | Emerson Climate Technologies, Inc. | Filtering systems and methods for voltage control |
US9933842B2 (en) | 2016-04-15 | 2018-04-03 | Emerson Climate Technologies, Inc. | Microcontroller architecture for power factor correction converter |
US11387729B2 (en) | 2016-04-15 | 2022-07-12 | Emerson Climate Technologies, Inc. | Buck-converter-based drive circuits for driving motors of compressors and condenser fans |
US10284132B2 (en) | 2016-04-15 | 2019-05-07 | Emerson Climate Technologies, Inc. | Driver for high-frequency switching voltage converters |
US10763740B2 (en) | 2016-04-15 | 2020-09-01 | Emerson Climate Technologies, Inc. | Switch off time control systems and methods |
US10305373B2 (en) | 2016-04-15 | 2019-05-28 | Emerson Climate Technologies, Inc. | Input reference signal generation systems and methods |
US9973147B2 (en) | 2016-05-10 | 2018-05-15 | Qorvo Us, Inc. | Envelope tracking power management circuit |
EP3466204B1 (en) * | 2016-05-30 | 2021-07-07 | Signify Holding B.V. | Switched mode power supply identification |
TWI601366B (en) * | 2016-06-03 | 2017-10-01 | 光寶電子(廣州)有限公司 | A power supply and voltage calibration method |
US10024898B2 (en) * | 2016-06-24 | 2018-07-17 | General Electric Company | System and method for determining inductance in a power converter |
US10056828B2 (en) * | 2016-07-11 | 2018-08-21 | Infineon Technologies Austria Ag | System and method for controlling current in a switching regulator |
CN106253661B (en) * | 2016-08-05 | 2018-12-28 | 矽力杰半导体技术(杭州)有限公司 | Control circuit, control method and the power inverter using it |
US10131245B2 (en) * | 2016-08-16 | 2018-11-20 | Ford Global Technologies, Llc | Electrified vehicle DC power conversion with distributed control |
US10608440B2 (en) | 2016-08-31 | 2020-03-31 | Te Connectivity Corporation | Control circuit configured to determine when a direct current component in an alternating current power line passes a designated threshold |
US20180069471A1 (en) * | 2016-09-06 | 2018-03-08 | Texas Instruments Incorporated | Optimizing the efficiency of a boost pre-converter while maintaining input power factor |
US10333416B2 (en) * | 2016-09-30 | 2019-06-25 | Semiconductor Components Industries, Llc | System and method for controlling voltage control loop in power converter |
WO2018094380A1 (en) | 2016-11-21 | 2018-05-24 | MY Tech, LLC | High efficiency power amplifier architectures for rf applications |
KR101866095B1 (en) * | 2016-12-09 | 2018-06-11 | 현대오트론 주식회사 | Apparatus and method for controlling pulse width modulation switching frequency |
DE202016007619U1 (en) * | 2016-12-15 | 2018-03-16 | Tridonic Gmbh & Co. Kg | Switching regulator and operating device for operating light bulbs |
WO2018110787A1 (en) * | 2016-12-15 | 2018-06-21 | 서울과학기술대학교 산학협력단 | Single-stage interleaved soft switching converter |
US10080082B2 (en) * | 2017-02-16 | 2018-09-18 | Akustica, Inc. | Microphone system having high acoustical overload point |
IT201700031159A1 (en) * | 2017-03-21 | 2018-09-21 | St Microelectronics Srl | CONTROL UNIT OF A CONVERTER IN SWITCHING OPERATING IN CONTINUOUS CONDUCTION MODE AND IN PEAK CURRENT CONTROL |
JP2019012906A (en) * | 2017-06-29 | 2019-01-24 | オムロン株式会社 | Electrical device |
SG10201706597YA (en) * | 2017-08-11 | 2019-03-28 | Opulent Electronics Int Pte Ltd | Device and method for providing an electrical current to an electrical load |
US10050443B1 (en) | 2017-08-17 | 2018-08-14 | Infineon Technologies Austria Ag | PFC controller add-on circuit to stabilize THDi performance |
JP6946878B2 (en) * | 2017-09-13 | 2021-10-13 | 富士電機株式会社 | Power factor improvement circuit and switching power supply using this |
US10033400B1 (en) | 2017-10-18 | 2018-07-24 | Schweitzer Engineering Laboratories, Inc. | Analog-to-digital converter verification using quantization noise properties |
US9985646B1 (en) | 2017-10-18 | 2018-05-29 | Schweitzer Engineering Laboratories, Inc. | Analog-to-digital converter verification using quantization noise properties |
US10381968B2 (en) | 2017-12-05 | 2019-08-13 | Otis Elevator Company | Converter pulse width modulation strategies for three phase regenerative drives |
US10931198B2 (en) * | 2017-12-08 | 2021-02-23 | Texas Instruments Incorporated | Buck-boost power converter controller |
US10128744B1 (en) * | 2017-12-13 | 2018-11-13 | Texas Instruments Incorporated | Single and multi-phase DC-DC converter mode control |
US10476437B2 (en) | 2018-03-15 | 2019-11-12 | Qorvo Us, Inc. | Multimode voltage tracker circuit |
US10250118B1 (en) * | 2018-04-16 | 2019-04-02 | Nxp B.V. | PWM mode boost switching regulator with programmable pulse skip mode |
US10158296B1 (en) | 2018-04-18 | 2018-12-18 | Nxp B.V. | Method and system for saturation control in a flyback switched-mode power supply (SMPS) |
DE202018102178U1 (en) * | 2018-04-19 | 2019-07-22 | Tridonic Gmbh & Co Kg | LED converter arrangement with linearized controlled system |
US11047946B2 (en) * | 2018-05-08 | 2021-06-29 | Qualcomm Incorporated | Differential current sensing with robust path, voltage offset removal and process, voltage, temperature (PVT) tolerance |
KR101982209B1 (en) * | 2018-06-14 | 2019-05-24 | 고려대학교 산학협력단 | Continnous-time delta-sigma modulator |
TWI685183B (en) * | 2018-07-04 | 2020-02-11 | 群光電能科技股份有限公司 | Hybrid-mode boost power factor corrector |
US10659029B2 (en) * | 2018-10-14 | 2020-05-19 | Cirrus Logic, Inc. | Chopped triangular wave PWM quantizer |
US10847989B2 (en) * | 2018-11-28 | 2020-11-24 | Robert Bosch Gmbh | Consumer arrangement and operating method |
CN113056866A (en) * | 2018-11-28 | 2021-06-29 | 斯兰纳亚洲有限公司 | Digitally compensated current sensing protection |
US11632054B2 (en) | 2019-04-24 | 2023-04-18 | Power Integrations, Inc. | Mode operation detection for control of a power converter with an active clamp switch |
JP7378495B2 (en) | 2019-04-24 | 2023-11-13 | パワー・インテグレーションズ・インコーポレーテッド | Power converters and respective control devices with active non-dissipative clamp circuits |
KR102125747B1 (en) * | 2019-05-13 | 2020-06-23 | 고려대학교 산학협력단 | Capacitively coupled continuous-time delta-sigma modulator and operation method thereof |
CN112019023B (en) * | 2019-05-31 | 2021-11-02 | 广东美的制冷设备有限公司 | Drive control method, device, household appliance and computer readable storage medium |
US11206743B2 (en) | 2019-07-25 | 2021-12-21 | Emerson Climate Technolgies, Inc. | Electronics enclosure with heat-transfer element |
US11682971B2 (en) * | 2019-09-20 | 2023-06-20 | Texas Instruments Incorporated | 4-phase buck-boost converter |
CN111082652B (en) * | 2019-12-30 | 2021-05-04 | 深圳市永联科技股份有限公司 | Power supply, power supply control method and device and power correction circuit |
US11323022B2 (en) * | 2020-05-28 | 2022-05-03 | Nxp B.V. | System for controlling inductor current of boost converter |
CN212183768U (en) * | 2020-06-15 | 2020-12-18 | 珠海市圣昌电子有限公司 | Voltage-regulating phase-cut dimming power supply |
CN111865047A (en) * | 2020-07-27 | 2020-10-30 | 珠海格力电器股份有限公司 | Power efficiency optimization method and device and power equipment |
US11366174B2 (en) * | 2020-09-11 | 2022-06-21 | Analog Devices, Inc. | Predicting failures in feedback network of power supplies using a secondary servo loop |
US11596037B2 (en) * | 2020-09-24 | 2023-02-28 | ERP Power, LLC | Voltage ripple detection and driver control for stable output current |
US10998815B1 (en) * | 2020-11-23 | 2021-05-04 | Robert S. Wrathall | Electrical circuits for power factor correction by measurement and removal of overtones |
US11637493B2 (en) * | 2020-11-23 | 2023-04-25 | Robert S. Wrathall | Electrical circuits for power factor correction by measurement and removal of overtones and power factor maximization |
JP2022100592A (en) * | 2020-12-24 | 2022-07-06 | 富士電機株式会社 | Switching control circuit and power circuit |
US11695327B2 (en) * | 2021-02-25 | 2023-07-04 | Nxp B.V. | Power converter control using current reconstruction of power factor correction inductor current |
US11575314B2 (en) * | 2021-05-28 | 2023-02-07 | Texas Instruments Incorporated | Autonomous mode transition for multimode operation in boost PFC converters |
RU2767039C1 (en) * | 2021-05-31 | 2022-03-16 | Общество с ограниченной ответственностью "Ледел" | Driver for led luminaire |
US20230092612A1 (en) * | 2021-06-16 | 2023-03-23 | BWI Technology LLC | Dual-Input Renewable Energy DC Microgrid-Ready Lighting Fixtures |
TWI786875B (en) * | 2021-10-08 | 2022-12-11 | 海韻電子工業股份有限公司 | Control Module of Power Correction Circuit |
US11933919B2 (en) | 2022-02-24 | 2024-03-19 | Mixed-Signal Devices Inc. | Systems and methods for synthesis of modulated RF signals |
US11894864B2 (en) * | 2022-03-23 | 2024-02-06 | Silicon Laboratories Inc. | Analog-to-digital converter having punctured quantizer |
EP4262072A1 (en) * | 2022-04-13 | 2023-10-18 | Abb Schweiz Ag | A method for reducing noise in a converter arrangement and a converter arrangement with noise reduction |
CN116260320B (en) * | 2023-05-12 | 2023-09-05 | 梵塔半导体技术(杭州)有限公司 | Switch circuit control method, switch circuit control chip and switch circuit |
CN116317482B (en) * | 2023-05-12 | 2023-09-05 | 梵塔半导体技术(杭州)有限公司 | Switch circuit control method, switch circuit control chip and switch circuit |
Citations (94)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3790878A (en) * | 1971-12-22 | 1974-02-05 | Keithley Instruments | Switching regulator having improved control circuiting |
US3881167A (en) * | 1973-07-05 | 1975-04-29 | Pelton Company Inc | Method and apparatus to maintain constant phase between reference and output signals |
US4075701A (en) * | 1975-02-12 | 1978-02-21 | Messerschmitt-Bolkow-Blohm Gesellschaft Mit Beschrankter Haftung | Method and circuit arrangement for adapting the measuring range of a measuring device operating with delta modulation in a navigation system |
US4334250A (en) * | 1978-03-16 | 1982-06-08 | Tektronix, Inc. | MFM data encoder with write precompensation |
US4414493A (en) * | 1981-10-06 | 1983-11-08 | Thomas Industries Inc. | Light dimmer for solid state ballast |
US4476706A (en) * | 1982-01-18 | 1984-10-16 | Delphian Partners | Remote calibration system |
US4677366A (en) * | 1986-05-12 | 1987-06-30 | Pioneer Research, Inc. | Unity power factor power supply |
US4683529A (en) * | 1986-11-12 | 1987-07-28 | Zytec Corporation | Switching power supply with automatic power factor correction |
US4700188A (en) * | 1985-01-29 | 1987-10-13 | Micronic Interface Technologies | Electric power measurement system and hall effect based electric power meter for use therein |
US4737658A (en) * | 1985-08-05 | 1988-04-12 | Brown, Boveri & Cie Ag | Centralized control receiver |
US4797633A (en) * | 1987-03-20 | 1989-01-10 | Video Sound, Inc. | Audio amplifier |
US4940929A (en) * | 1989-06-23 | 1990-07-10 | Apollo Computer, Inc. | AC to DC converter with unity power factor |
US4979087A (en) * | 1988-09-09 | 1990-12-18 | Aviation Limited | Inductive coupler |
US4992919A (en) * | 1989-12-29 | 1991-02-12 | Lee Chu Quon | Parallel resonant converter with zero voltage switching |
US4994952A (en) * | 1988-02-10 | 1991-02-19 | Electronics Research Group, Inc. | Low-noise switching power supply having variable reluctance transformer |
US5206540A (en) * | 1991-05-09 | 1993-04-27 | Unitrode Corporation | Transformer isolated drive circuit |
US5274890A (en) * | 1992-01-10 | 1994-01-04 | Takata Corporation | Seat belt tongue retaining device |
US5323157A (en) * | 1993-01-15 | 1994-06-21 | Motorola, Inc. | Sigma-delta digital-to-analog converter with reduced noise |
US5383109A (en) * | 1993-12-10 | 1995-01-17 | University Of Colorado | High power factor boost rectifier apparatus |
US5565761A (en) * | 1994-09-02 | 1996-10-15 | Micro Linear Corp | Synchronous switching cascade connected offline PFC-PWM combination power converter controller |
US5638265A (en) * | 1993-08-24 | 1997-06-10 | Gabor; George | Low line harmonic AC to DC power supply |
US5691890A (en) * | 1995-12-01 | 1997-11-25 | International Business Machines Corporation | Power supply with power factor correction circuit |
US5747977A (en) * | 1995-03-30 | 1998-05-05 | Micro Linear Corporation | Switching regulator having low power mode responsive to load power consumption |
US5781040A (en) * | 1996-10-31 | 1998-07-14 | Hewlett-Packard Company | Transformer isolated driver for power transistor using frequency switching as the control signal |
US5900683A (en) * | 1997-12-23 | 1999-05-04 | Ford Global Technologies, Inc. | Isolated gate driver for power switching device and method for carrying out same |
US5929400A (en) * | 1997-12-22 | 1999-07-27 | Otis Elevator Company | Self commissioning controller for field-oriented elevator motor/drive system |
US5946202A (en) * | 1997-01-24 | 1999-08-31 | Baker Hughes Incorporated | Boost mode power conversion |
US5952849A (en) * | 1997-02-21 | 1999-09-14 | Analog Devices, Inc. | Logic isolator with high transient immunity |
US5963086A (en) * | 1997-08-08 | 1999-10-05 | Velodyne Acoustics, Inc. | Class D amplifier with switching control |
US5966297A (en) * | 1997-08-28 | 1999-10-12 | Iwatsu Electric Co., Ltd. | Large bandwidth analog isolation circuit |
US6016038A (en) * | 1997-08-26 | 2000-01-18 | Color Kinetics, Inc. | Multicolored LED lighting method and apparatus |
US6072969A (en) * | 1996-03-05 | 2000-06-06 | Canon Kabushiki Kaisha | Developing cartridge |
US6083276A (en) * | 1998-06-11 | 2000-07-04 | Corel, Inc. | Creating and configuring component-based applications using a text-based descriptive attribute grammar |
US6084450A (en) * | 1997-01-14 | 2000-07-04 | The Regents Of The University Of California | PWM controller with one cycle response |
US6211627B1 (en) * | 1997-07-29 | 2001-04-03 | Michael Callahan | Lighting systems |
US6211626B1 (en) * | 1997-08-26 | 2001-04-03 | Color Kinetics, Incorporated | Illumination components |
US6246183B1 (en) * | 2000-02-28 | 2001-06-12 | Litton Systems, Inc. | Dimmable electrodeless light source |
US6304473B1 (en) * | 2000-06-02 | 2001-10-16 | Iwatt | Operating a power converter at optimal efficiency |
US6344811B1 (en) * | 1999-03-16 | 2002-02-05 | Audio Logic, Inc. | Power supply compensation for noise shaped, digital amplifiers |
US6385063B1 (en) * | 1998-06-23 | 2002-05-07 | Siemens Aktiengesellschaft | Hybrid filter for an alternating current network |
US6407691B1 (en) * | 2000-10-18 | 2002-06-18 | Cirrus Logic, Inc. | Providing power, clock, and control signals as a single combined signal across an isolation barrier in an ADC |
US20020150151A1 (en) * | 1997-04-22 | 2002-10-17 | Silicon Laboratories Inc. | Digital isolation system with hybrid circuit in ADC calibration loop |
US6509913B2 (en) * | 1998-04-30 | 2003-01-21 | Openwave Systems Inc. | Configurable man-machine interface |
US6583560B1 (en) * | 1999-11-26 | 2003-06-24 | Pioneer Corporation | Plasma display panel |
US6636003B2 (en) * | 2000-09-06 | 2003-10-21 | Spectrum Kinetics | Apparatus and method for adjusting the color temperature of white semiconduct or light emitters |
US20040046683A1 (en) * | 2001-03-08 | 2004-03-11 | Shindengen Electric Manufacturing Co., Ltd. | DC stabilized power supply |
US6713974B2 (en) * | 2002-01-10 | 2004-03-30 | Lightech Electronic Industries Ltd. | Lamp transformer for use with an electronic dimmer and method for use thereof for reducing acoustic noise |
US6781351B2 (en) * | 2002-08-17 | 2004-08-24 | Supertex Inc. | AC/DC cascaded power converters having high DC conversion ratio and improved AC line harmonics |
US6788011B2 (en) * | 1997-08-26 | 2004-09-07 | Color Kinetics, Incorporated | Multicolored LED lighting method and apparatus |
US20040227571A1 (en) * | 2003-05-12 | 2004-11-18 | Yasuji Kuribayashi | Power amplifier circuit |
US20040228116A1 (en) * | 2003-05-13 | 2004-11-18 | Carroll Miller | Electroluminescent illumination for a magnetic compass |
US20040232971A1 (en) * | 2003-03-06 | 2004-11-25 | Denso Corporation | Electrically insulated switching element drive circuit |
US6860628B2 (en) * | 2002-07-17 | 2005-03-01 | Jonas J. Robertson | LED replacement for fluorescent lighting |
US6870325B2 (en) * | 2002-02-22 | 2005-03-22 | Oxley Developments Company Limited | Led drive circuit and method |
US6873065B2 (en) * | 1997-10-23 | 2005-03-29 | Analog Devices, Inc. | Non-optical signal isolator |
US6882552B2 (en) * | 2000-06-02 | 2005-04-19 | Iwatt, Inc. | Power converter driven by power pulse and sense pulse |
US6888322B2 (en) * | 1997-08-26 | 2005-05-03 | Color Kinetics Incorporated | Systems and methods for color changing device and enclosure |
US6894471B2 (en) * | 2002-05-31 | 2005-05-17 | St Microelectronics S.R.L. | Method of regulating the supply voltage of a load and related voltage regulator |
US6940733B2 (en) * | 2002-08-22 | 2005-09-06 | Supertex, Inc. | Optimal control of wide conversion ratio switching converters |
US6944034B1 (en) * | 2003-06-30 | 2005-09-13 | Iwatt Inc. | System and method for input current shaping in a power converter |
US20050207190A1 (en) * | 2004-03-22 | 2005-09-22 | Gritter David J | Power system having a phase locked loop with a notch filter |
US20050218838A1 (en) * | 2004-03-15 | 2005-10-06 | Color Kinetics Incorporated | LED-based lighting network power control methods and apparatus |
US6956750B1 (en) * | 2003-05-16 | 2005-10-18 | Iwatt Inc. | Power converter controller having event generator for detection of events and generation of digital error |
US6958920B2 (en) * | 2003-10-02 | 2005-10-25 | Supertex, Inc. | Switching power converter and method of controlling output voltage thereof using predictive sensing of magnetic flux |
US6967448B2 (en) * | 1997-08-26 | 2005-11-22 | Color Kinetics, Incorporated | Methods and apparatus for controlling illumination |
US20050270813A1 (en) * | 2004-06-04 | 2005-12-08 | Wanfeng Zhang | Parallel current mode control |
US20060023002A1 (en) * | 2004-08-02 | 2006-02-02 | Oki Electric Industry Co., Ltd. | Color balancing circuit for a display panel |
US20060022916A1 (en) * | 2004-06-14 | 2006-02-02 | Natale Aiello | LED driving device with variable light intensity |
US7064498B2 (en) * | 1997-08-26 | 2006-06-20 | Color Kinetics Incorporated | Light-emitting diode based products |
US7075329B2 (en) * | 2003-04-30 | 2006-07-11 | Analog Devices, Inc. | Signal isolators using micro-transformers |
US7078963B1 (en) * | 2003-03-21 | 2006-07-18 | D2Audio Corporation | Integrated PULSHI mode with shutdown |
US7088059B2 (en) * | 2004-07-21 | 2006-08-08 | Boca Flasher | Modulated control circuit and method for current-limited dimming and color mixing of display and illumination systems |
US7102902B1 (en) * | 2005-02-17 | 2006-09-05 | Ledtronics, Inc. | Dimmer circuit for LED |
US7106603B1 (en) * | 2005-05-23 | 2006-09-12 | Li Shin International Enterprise Corporation | Switch-mode self-coupling auxiliary power device |
US7109791B1 (en) * | 2004-07-09 | 2006-09-19 | Rf Micro Devices, Inc. | Tailored collector voltage to minimize variation in AM to PM distortion in a power amplifier |
US7109977B2 (en) * | 2003-10-05 | 2006-09-19 | T2D, Inc. | Slipcover touch input apparatus for displays of computing devices |
US20060226795A1 (en) * | 2005-04-08 | 2006-10-12 | S.C. Johnson & Son, Inc. | Lighting device having a circuit including a plurality of light emitting diodes, and methods of controlling and calibrating lighting devices |
US7135824B2 (en) * | 1997-08-26 | 2006-11-14 | Color Kinetics Incorporated | Systems and methods for controlling illumination sources |
US20060261754A1 (en) * | 2005-05-18 | 2006-11-23 | Samsung Electro-Mechanics Co., Ltd. | LED driving circuit having dimming circuit |
US7158633B1 (en) * | 1999-11-16 | 2007-01-02 | Silicon Laboratories, Inc. | Method and apparatus for monitoring subscriber loop interface circuitry power dissipation |
US20070029946A1 (en) * | 2005-08-03 | 2007-02-08 | Yu Chung-Che | APPARATUS OF LIGHT SOURCE AND ADJUSTABLE CONTROL CIRCUIT FOR LEDs |
US20070040512A1 (en) * | 2005-08-17 | 2007-02-22 | Tir Systems Ltd. | Digitally controlled luminaire system |
US20070053182A1 (en) * | 2005-09-07 | 2007-03-08 | Jonas Robertson | Combination fluorescent and LED lighting system |
US7221130B2 (en) * | 2005-01-05 | 2007-05-22 | Fyrestorm, Inc. | Switching power converter employing pulse frequency modulation control |
US7233135B2 (en) * | 2003-09-29 | 2007-06-19 | Murata Manufacturing Co., Ltd. | Ripple converter |
US20070182699A1 (en) * | 2006-02-09 | 2007-08-09 | Samsung Electro-Mechanics Co., Ltd. | Field sequential color mode liquid crystal display |
US7255457B2 (en) * | 1999-11-18 | 2007-08-14 | Color Kinetics Incorporated | Methods and apparatus for generating and modulating illumination conditions |
US7266001B1 (en) * | 2004-03-19 | 2007-09-04 | Marvell International Ltd. | Method and apparatus for controlling power factor correction |
US7292013B1 (en) * | 2004-09-24 | 2007-11-06 | Marvell International Ltd. | Circuits, systems, methods, and software for power factor correction and/or control |
US20080192509A1 (en) * | 2007-02-13 | 2008-08-14 | Dhuyvetter Timothy A | Dc-dc converter with isolation |
US20080259655A1 (en) * | 2007-04-19 | 2008-10-23 | Da-Chun Wei | Switching-mode power converter and pulse-width-modulation control circuit with primary-side feedback control |
US20080278132A1 (en) * | 2007-05-07 | 2008-11-13 | Kesterson John W | Digital Compensation For Cable Drop In A Primary Side Control Power Supply Controller |
US7545130B2 (en) * | 2005-11-11 | 2009-06-09 | L&L Engineering, Llc | Non-linear controller for switching power supply |
US20090147544A1 (en) * | 2007-12-11 | 2009-06-11 | Melanson John L | Modulated transformer-coupled gate control signaling method and apparatus |
Family Cites Families (204)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3316495A (en) * | 1964-07-06 | 1967-04-25 | Cons Systems Corp | Low-level commutator with means for providing common mode rejection |
US3423689A (en) * | 1965-08-19 | 1969-01-21 | Hewlett Packard Co | Direct current amplifier |
US3586988A (en) * | 1967-12-01 | 1971-06-22 | Newport Lab | Direct coupled differential amplifier |
US3725804A (en) | 1971-11-26 | 1973-04-03 | Avco Corp | Capacitance compensation circuit for differential amplifier |
US4337441A (en) | 1980-02-11 | 1982-06-29 | Tektronix, Inc. | Supply-voltage driver for a differential amplifier |
SE438048B (en) * | 1980-06-16 | 1985-03-25 | Asea Ab | FIBEROPTIC TEMPERATURE SENSOR BASED ON PHOTOLUMINISCENCE OF A SOLID MATERIAL EXPOSED TO THE TEMPERATURE TO BE METAS |
US4523128A (en) * | 1982-12-10 | 1985-06-11 | Honeywell Inc. | Remote control of dimmable electronic gas discharge lamp ballasts |
GB8817684D0 (en) * | 1988-07-25 | 1988-09-01 | Astec Int Ltd | Power factor improvement |
US4977366A (en) * | 1988-10-07 | 1990-12-11 | Lucas Weinschel Inc. | High frequency power sensing device |
US4937727A (en) * | 1989-03-07 | 1990-06-26 | Rca Licensing Corporation | Switch-mode power supply with transformer-coupled feedback |
US4973919A (en) * | 1989-03-23 | 1990-11-27 | Doble Engineering Company | Amplifying with directly coupled, cascaded amplifiers |
US4980898A (en) * | 1989-08-08 | 1990-12-25 | Siemens-Pacesetter, Inc. | Self-oscillating burst mode transmitter with integral number of periods |
US5109185A (en) | 1989-09-29 | 1992-04-28 | Ball Newton E | Phase-controlled reversible power converter presenting a controllable counter emf to a source of an impressed voltage |
US5006975A (en) * | 1989-11-03 | 1991-04-09 | Cherry Semiconductor Corporation | Power factor correction circuit |
US5003454A (en) * | 1990-01-09 | 1991-03-26 | North American Philips Corporation | Power supply with improved power factor correction |
US5055746A (en) | 1990-08-13 | 1991-10-08 | Electronic Ballast Technology, Incorporated | Remote control of fluorescent lamp ballast using power flow interruption coding with means to maintain filament voltage substantially constant as the lamp voltage decreases |
US5278490A (en) * | 1990-09-04 | 1994-01-11 | California Institute Of Technology | One-cycle controlled switching circuit |
US5121079A (en) * | 1991-02-12 | 1992-06-09 | Dargatz Marvin R | Driven-common electronic amplifier |
US5477481A (en) * | 1991-02-15 | 1995-12-19 | Crystal Semiconductor Corporation | Switched-capacitor integrator with chopper stabilization performed at the sampling rate |
DE69223508T2 (en) * | 1992-07-10 | 1998-06-25 | Ibm | Decimation filter for a sigma-delta converter and A / D converter with such a filter |
DE69222762T2 (en) * | 1992-07-30 | 1998-02-12 | St Microelectronics Srl | Control part and error amplifier device with a circuit for measuring the voltage fluctuations related to a voltage setpoint |
US5264780A (en) | 1992-08-10 | 1993-11-23 | International Business Machines Corporation | On time control and gain circuit |
US5313381A (en) | 1992-09-01 | 1994-05-17 | Power Integrations, Inc. | Three-terminal switched mode power supply integrated circuit |
US5359180A (en) * | 1992-10-02 | 1994-10-25 | General Electric Company | Power supply system for arcjet thrusters |
JPH06209569A (en) * | 1993-01-05 | 1994-07-26 | Yokogawa Electric Corp | Switching power supply |
US5481178A (en) * | 1993-03-23 | 1996-01-02 | Linear Technology Corporation | Control circuit and method for maintaining high efficiency over broad current ranges in a switching regulator circuit |
DE4320682C1 (en) | 1993-06-22 | 1995-01-26 | Siemens Ag | Method and circuit arrangement for regulating the lighting of a room |
KR960013948B1 (en) * | 1993-11-16 | 1996-10-10 | 삼성전자 주식회사 | Power factor compensation circuit |
US5479333A (en) * | 1994-04-25 | 1995-12-26 | Chrysler Corporation | Power supply start up booster circuit |
JPH0962816A (en) * | 1994-10-06 | 1997-03-07 | Mitsubishi Electric Corp | Non-contact ic card and non-contact ic card system including the same |
US5867379A (en) * | 1995-01-12 | 1999-02-02 | University Of Colorado | Non-linear carrier controllers for high power factor rectification |
US5668446A (en) | 1995-01-17 | 1997-09-16 | Negawatt Technologies Inc. | Energy management control system for fluorescent lighting |
JP2730506B2 (en) | 1995-02-27 | 1998-03-25 | 日本電気株式会社 | DC / DC converter using piezoelectric transformer |
US5971597A (en) | 1995-03-29 | 1999-10-26 | Hubbell Corporation | Multifunction sensor and network sensor system |
JPH09140145A (en) | 1995-11-15 | 1997-05-27 | Samsung Electron Co Ltd | Boosting converter provided with power-factor compensating circuit |
KR0154776B1 (en) * | 1995-12-28 | 1998-12-15 | 김광호 | Power factor compensation circuit |
US5741123A (en) * | 1996-01-18 | 1998-04-21 | Pauly; Lou Allen | Turbocharger compressor fan and housing |
US5815102A (en) * | 1996-06-12 | 1998-09-29 | Audiologic, Incorporated | Delta sigma pwm dac to reduce switching |
US6150969A (en) * | 1996-06-12 | 2000-11-21 | Audiologic, Incorporated | Correction of nonlinear output distortion in a Delta Sigma DAC |
US5798635A (en) * | 1996-06-20 | 1998-08-25 | Micro Linear Corporation | One pin error amplifier and switched soft-start for an eight pin PFC-PWM combination integrated circuit converter controller |
US5844399A (en) * | 1996-07-26 | 1998-12-01 | The University Of Toledo | Battery charger control system |
KR100206143B1 (en) * | 1996-08-28 | 1999-07-01 | 윤종용 | A power factor correction circuit |
US5912812A (en) | 1996-12-19 | 1999-06-15 | Lucent Technologies Inc. | Boost power converter for powering a load from an AC source |
US5783909A (en) * | 1997-01-10 | 1998-07-21 | Relume Corporation | Maintaining LED luminous intensity |
US5960207A (en) * | 1997-01-21 | 1999-09-28 | Dell Usa, L.P. | System and method for reducing power losses by gating an active power factor conversion process |
JP3644615B2 (en) | 1997-02-17 | 2005-05-11 | Tdk株式会社 | Switching power supply |
DE19713814A1 (en) | 1997-04-03 | 1998-10-15 | Siemens Ag | Switching power supply |
US5901176A (en) | 1997-04-29 | 1999-05-04 | Hewlett-Packard Company | Delta-sigma pulse width modulator control circuit |
KR100286047B1 (en) * | 1998-05-15 | 2001-04-16 | 김덕중 | Power factor correction(pfc) circuit using reverse sawtooth wave |
KR100303450B1 (en) * | 1998-05-29 | 2001-11-30 | 김덕중 | Pfc controller |
US6043633A (en) * | 1998-06-05 | 2000-03-28 | Systel Development & Industries | Power factor correction method and apparatus |
IL125328A0 (en) * | 1998-07-13 | 1999-03-12 | Univ Ben Gurion | Modular apparatus for regulating the harmonics of current drawn from power lines |
US6140777A (en) | 1998-07-29 | 2000-10-31 | Philips Electronics North America Corporation | Preconditioner having a digital power factor controller |
KR100293979B1 (en) | 1998-11-10 | 2001-09-17 | 김덕중 | Switching Mode Power Supply |
DE69833635T2 (en) | 1998-12-14 | 2007-01-18 | Alcatel | Amplification arrangement with voltage amplification and reduced power consumption |
US6495964B1 (en) | 1998-12-18 | 2002-12-17 | Koninklijke Philips Electronics N.V. | LED luminaire with electrically adjusted color balance using photodetector |
US6091233A (en) | 1999-01-14 | 2000-07-18 | Micro Linear Corporation | Interleaved zero current switching in a power factor correction boost converter |
US6064187A (en) | 1999-02-12 | 2000-05-16 | Analog Devices, Inc. | Voltage regulator compensation circuit and method |
DE10032846A1 (en) * | 1999-07-12 | 2001-01-25 | Int Rectifier Corp | Power factor correction circuit for a.c.-d.c. power converter varies switch-off time as function of the peak inductance current during each switching period |
US6317068B1 (en) | 1999-08-23 | 2001-11-13 | Level One Communications, Inc. | Method and apparatus for matching common mode output voltage at a switched-capacitor to continuous-time interface |
US6160724A (en) * | 1999-10-26 | 2000-12-12 | International Business Machines Corporation | Boost doubler circuit wherein an AC bridge rectifier is not required |
US6181114B1 (en) | 1999-10-26 | 2001-01-30 | International Business Machines Corporation | Boost circuit which includes an additional winding for providing an auxiliary output voltage |
US6407515B1 (en) | 1999-11-12 | 2002-06-18 | Lighting Control, Inc. | Power regulator employing a sinusoidal reference |
US6229271B1 (en) * | 2000-02-24 | 2001-05-08 | Osram Sylvania Inc. | Low distortion line dimmer and dimming ballast |
US6636107B2 (en) | 2000-03-28 | 2003-10-21 | International Rectifier Corporation | Active filter for reduction of common mode current |
US6970503B1 (en) * | 2000-04-21 | 2005-11-29 | National Semiconductor Corporation | Apparatus and method for converting analog signal to pulse-width-modulated signal |
US6693571B2 (en) | 2000-05-10 | 2004-02-17 | Cirrus Logic, Inc. | Modulation of a digital input signal using a digital signal modulator and signal splitting |
US6344986B1 (en) * | 2000-06-15 | 2002-02-05 | Astec International Limited | Topology and control method for power factor correction |
DE60101978T2 (en) | 2000-06-15 | 2004-12-23 | City University Of Hong Kong | Dimmable ECG |
US6690594B2 (en) * | 2000-08-10 | 2004-02-10 | Sal G. Amarillas | Electrical power conservation apparatus and method |
US6373340B1 (en) | 2000-08-14 | 2002-04-16 | K. S. Waves, Ltd. | High-efficiency audio power amplifier |
US6404369B1 (en) | 2000-09-29 | 2002-06-11 | Teradyne, Inc. | Digital to analog converter employing sigma-delta loop and feedback DAC model |
US6583550B2 (en) * | 2000-10-24 | 2003-06-24 | Toyoda Gosei Co., Ltd. | Fluorescent tube with light emitting diodes |
FR2815790B1 (en) | 2000-10-24 | 2003-02-07 | St Microelectronics Sa | VOLTAGE CONVERTER WITH SELF-SWITCHING CONTROL CIRCUIT |
US6343026B1 (en) | 2000-11-09 | 2002-01-29 | Artesyn Technologies, Inc. | Current limit circuit for interleaved converters |
US6369525B1 (en) | 2000-11-21 | 2002-04-09 | Philips Electronics North America | White light-emitting-diode lamp driver based on multiple output converter with output current mode control |
JP2002171205A (en) | 2000-11-30 | 2002-06-14 | Matsushita Electric Works Ltd | System setting method for power line carrier terminal and device for setting power line carrier terminal |
JP3371962B2 (en) | 2000-12-04 | 2003-01-27 | サンケン電気株式会社 | DC-DC converter |
DE10061563B4 (en) | 2000-12-06 | 2005-12-08 | RUBITEC Gesellschaft für Innovation und Technologie der Ruhr-Universität Bochum mbH | Method and apparatus for switching on and off of power semiconductors, in particular for a variable-speed operation of an asynchronous machine, operating an ignition circuit for gasoline engines, and switching power supply |
US6441558B1 (en) | 2000-12-07 | 2002-08-27 | Koninklijke Philips Electronics N.V. | White LED luminary light control system |
EP1215808B1 (en) * | 2000-12-13 | 2011-05-11 | Semiconductor Components Industries, LLC | A power supply circuit and method thereof to detect demagnitization of the power supply |
CN1121088C (en) * | 2000-12-26 | 2003-09-10 | 艾黙生网络能源有限公司 | Single-phase power factor correcting step-up converter |
US6646848B2 (en) | 2001-01-31 | 2003-11-11 | Matsushita Electric Industrial Co., Ltd. | Switching power supply apparatus |
WO2002062106A1 (en) | 2001-02-02 | 2002-08-08 | Koninklijke Philips Electronics N.V. | Integrated light source |
US6452521B1 (en) | 2001-03-14 | 2002-09-17 | Rosemount Inc. | Mapping a delta-sigma converter range to a sensor range |
US6510995B2 (en) * | 2001-03-16 | 2003-01-28 | Koninklijke Philips Electronics N.V. | RGB LED based light driver using microprocessor controlled AC distributed power system |
US6407514B1 (en) | 2001-03-29 | 2002-06-18 | General Electric Company | Non-synchronous control of self-oscillating resonant converters |
US6531854B2 (en) | 2001-03-30 | 2003-03-11 | Champion Microelectronic Corp. | Power factor correction circuit arrangement |
US6917504B2 (en) * | 2001-05-02 | 2005-07-12 | Supertex, Inc. | Apparatus and method for adaptively controlling power supplied to a hot-pluggable subsystem |
EP1388276B1 (en) | 2001-05-10 | 2011-08-10 | Philips Solid-State Lighting Solutions, Inc. | Systems and methods for synchronizing lighting effects |
US6486645B1 (en) * | 2001-06-13 | 2002-11-26 | Sipex Corporation | Voltage regulation circuit and related methods having a dynamically determined minimum discharge time |
US20020196006A1 (en) | 2001-06-21 | 2002-12-26 | Champion Microelectronic Corp. | Volt-second balanced PFCPWM power converter |
US6628106B1 (en) | 2001-07-30 | 2003-09-30 | University Of Central Florida | Control method and circuit to provide voltage and current regulation for multiphase DC/DC converters |
US6600296B2 (en) * | 2001-11-13 | 2003-07-29 | Intel Corporation | Method and semiconductor die with multiple phase power converter |
US7006367B2 (en) | 2002-01-11 | 2006-02-28 | Precisionh2 Power Inc. | Power factor controller |
US20080027841A1 (en) | 2002-01-16 | 2008-01-31 | Jeff Scott Eder | System for integrating enterprise performance management |
US6980446B2 (en) | 2002-02-08 | 2005-12-27 | Sanken Electric Co., Ltd. | Circuit for starting power source apparatus |
US7756896B1 (en) | 2002-03-11 | 2010-07-13 | Jp Morgan Chase Bank | System and method for multi-dimensional risk analysis |
DE10212605B4 (en) | 2002-03-21 | 2004-09-23 | Infineon Technologies Ag | Method and device for clocked activation of a switching element |
JP3947682B2 (en) | 2002-04-26 | 2007-07-25 | Fdk株式会社 | Switching power supply circuit |
SE0201432D0 (en) | 2002-04-29 | 2002-05-13 | Emerson Energy Systems Ab | A Power supply system and apparatus |
US7358679B2 (en) * | 2002-05-09 | 2008-04-15 | Philips Solid-State Lighting Solutions, Inc. | Dimmable LED-based MR16 lighting apparatus and methods |
US6844702B2 (en) * | 2002-05-16 | 2005-01-18 | Koninklijke Philips Electronics N.V. | System, method and apparatus for contact-less battery charging with dynamic control |
US7317445B2 (en) | 2002-05-28 | 2008-01-08 | Koninklijke Philips Electronics N. V. | Motion blur decrease in varying duty cycle |
JP4175027B2 (en) * | 2002-05-28 | 2008-11-05 | 松下電工株式会社 | Discharge lamp lighting device |
US6657417B1 (en) | 2002-05-31 | 2003-12-02 | Champion Microelectronic Corp. | Power factor correction with carrier control and input voltage sensing |
US6728121B2 (en) | 2002-05-31 | 2004-04-27 | Green Power Technologies Ltd. | Method and apparatus for active power factor correction with minimum input current distortion |
US6753661B2 (en) * | 2002-06-17 | 2004-06-22 | Koninklijke Philips Electronics N.V. | LED-based white-light backlighting for electronic displays |
EP1525656A1 (en) | 2002-06-23 | 2005-04-27 | Powerlynx A/S | Power converter |
US6756772B2 (en) | 2002-07-08 | 2004-06-29 | Cogency Semiconductor Inc. | Dual-output direct current voltage converter |
US6724174B1 (en) | 2002-09-12 | 2004-04-20 | Linear Technology Corp. | Adjustable minimum peak inductor current level for burst mode in current-mode DC-DC regulators |
KR100470599B1 (en) | 2002-10-16 | 2005-03-10 | 삼성전자주식회사 | Power supply capable of protecting electric device circuit |
US6744223B2 (en) * | 2002-10-30 | 2004-06-01 | Quebec, Inc. | Multicolor lamp system |
US6727832B1 (en) * | 2002-11-27 | 2004-04-27 | Cirrus Logic, Inc. | Data converters with digitally filtered pulse width modulation output stages and methods and systems using the same |
US6741123B1 (en) * | 2002-12-26 | 2004-05-25 | Cirrus Logic, Inc. | Delta-sigma amplifiers with output stage supply voltage variation compensation and methods and digital amplifier systems using the same |
US6842486B2 (en) * | 2003-01-21 | 2005-01-11 | Cirrus Logic, Inc. | Signal processing system with baseband noise modulation and noise fold back reduction |
US6768655B1 (en) * | 2003-02-03 | 2004-07-27 | System General Corp. | Discontinuous mode PFC controller having a power saving modulator and operation method thereof |
JP3947720B2 (en) * | 2003-02-28 | 2007-07-25 | 日本放送協会 | How to use dimming control lighting device for incandescent lamp |
EP1460775B8 (en) | 2003-03-18 | 2007-02-28 | POWER ONE ITALY S.p.A. | Lighting control with power line modem |
US7126288B2 (en) | 2003-05-05 | 2006-10-24 | International Rectifier Corporation | Digital electronic ballast control apparatus and method |
EP1639534A2 (en) | 2003-06-20 | 2006-03-29 | Gaiasoft Limited | System for facilitating management and organisational development processes |
ITMI20031315A1 (en) * | 2003-06-27 | 2004-12-28 | St Microelectronics Srl | DEVICE FOR CORRECTION OF THE POWER FACTOR IN FORCED SWITCHING POWER SUPPLIES. |
US20060238136A1 (en) | 2003-07-02 | 2006-10-26 | Johnson Iii H F | Lamp and bulb for illumination and ambiance lighting |
EP2806531B1 (en) | 2003-07-07 | 2019-10-23 | Nippon Telegraph And Telephone Corporation | Booster |
US6839247B1 (en) | 2003-07-10 | 2005-01-04 | System General Corp. | PFC-PWM controller having a power saving means |
US20050197952A1 (en) | 2003-08-15 | 2005-09-08 | Providus Software Solutions, Inc. | Risk mitigation management |
US6933706B2 (en) | 2003-09-15 | 2005-08-23 | Semiconductor Components Industries, Llc | Method and circuit for optimizing power efficiency in a DC-DC converter |
ITMI20031987A1 (en) | 2003-10-14 | 2005-04-15 | Archimede Elettronica S R L | DEVICE AND METHOD FOR CHECKING THE COLOR OF A LIGHTING SOURCE |
US20060116898A1 (en) | 2003-11-18 | 2006-06-01 | Peterson Gary E | Interactive risk management system and method with reputation risk management |
US7019507B1 (en) * | 2003-11-26 | 2006-03-28 | Linear Technology Corporation | Methods and circuits for programmable current limit protection |
US7009543B2 (en) * | 2004-01-16 | 2006-03-07 | Cirrus Logic, Inc. | Multiple non-monotonic quantizer regions for noise shaping |
US20050018495A1 (en) * | 2004-01-29 | 2005-01-27 | Netlist, Inc. | Arrangement of integrated circuits in a memory module |
US7034611B2 (en) | 2004-02-09 | 2006-04-25 | Texas Instruments Inc. | Multistage common mode feedback for improved linearity line drivers |
US7142142B2 (en) * | 2004-02-25 | 2006-11-28 | Nelicor Puritan Bennett, Inc. | Multi-bit ADC with sigma-delta modulation |
MXPA06009907A (en) | 2004-03-03 | 2006-12-14 | Johnson & Son Inc S C | Led light bulb with active ingredient emission. |
EP1754121A4 (en) | 2004-03-15 | 2014-02-12 | Philips Solid State Lighting | Methods and systems for providing lighting systems |
JP4337041B2 (en) * | 2004-03-17 | 2009-09-30 | 株式会社デンソー | DC-DC converter |
US7569996B2 (en) | 2004-03-19 | 2009-08-04 | Fred H Holmes | Omni voltage direct current power supply |
US20050222881A1 (en) | 2004-04-05 | 2005-10-06 | Garry Booker | Management work system and method |
US7259524B2 (en) * | 2004-06-10 | 2007-08-21 | Lutron Electronics Co., Inc. | Apparatus and methods for regulating delivery of electrical energy |
DE102004033354B4 (en) * | 2004-07-09 | 2015-06-11 | Infineon Technologies Ag | Method for controlling a switch in a boost converter and drive circuit |
FR2873243A1 (en) * | 2004-07-13 | 2006-01-20 | St Microelectronics Sa | ADAPTABLE POWER CIRCUIT |
DE602004015276D1 (en) * | 2004-08-06 | 2008-09-04 | Verigy Pte Ltd Singapore | Improved analog signal generation by means of a delta-sigma modulator |
JP2006067730A (en) * | 2004-08-27 | 2006-03-09 | Sanken Electric Co Ltd | Power factor improving circuit |
JP4646583B2 (en) * | 2004-09-17 | 2011-03-09 | キヤノン株式会社 | Imaging apparatus and control method thereof |
US7276861B1 (en) | 2004-09-21 | 2007-10-02 | Exclara, Inc. | System and method for driving LED |
CA2521973C (en) | 2004-09-29 | 2013-12-10 | Tir Systems Ltd. | System and method for controlling luminaires |
US20060125420A1 (en) * | 2004-12-06 | 2006-06-15 | Michael Boone | Candle emulation device |
US7723964B2 (en) | 2004-12-15 | 2010-05-25 | Fujitsu General Limited | Power supply device |
GB2421367B (en) | 2004-12-20 | 2008-09-03 | Stephen Bryce Hayes | Lighting apparatus and method |
TWI253224B (en) * | 2004-12-21 | 2006-04-11 | Richtek Techohnology Corp | Over-voltage and over-current protector and protective method for rising voltage current-mode converter |
US8193795B2 (en) * | 2005-01-05 | 2012-06-05 | Exar, Inc. | Output current and input power regulation with a power converter |
US7180250B1 (en) | 2005-01-25 | 2007-02-20 | Henry Michael Gannon | Triac-based, low voltage AC dimmer |
US7945472B2 (en) | 2005-02-11 | 2011-05-17 | Optimum Outcomes, Llc | Business management tool |
CA2637757A1 (en) | 2005-03-03 | 2006-09-08 | Tir Technology Lp | Method and apparatus for controlling thermal stress in lighting devices |
US7378805B2 (en) | 2005-03-22 | 2008-05-27 | Fairchild Semiconductor Corporation | Single-stage digital power converter for driving LEDs |
CN100413191C (en) | 2005-03-30 | 2008-08-20 | 昂宝电子(上海)有限公司 | System and method for controlling switch frequency change in power supply transducer |
US7064531B1 (en) * | 2005-03-31 | 2006-06-20 | Micrel, Inc. | PWM buck regulator with LDO standby mode |
US7456621B2 (en) * | 2005-05-06 | 2008-11-25 | Silicon Laboratories Inc. | Digital controller based power factor correction circuit |
DE102006022845B4 (en) | 2005-05-23 | 2016-01-07 | Infineon Technologies Ag | A drive circuit for a switch unit of a clocked power supply circuit and resonance converter |
JP2006333053A (en) * | 2005-05-26 | 2006-12-07 | Renesas Technology Corp | Analog-to-digital converter |
US7336127B2 (en) | 2005-06-10 | 2008-02-26 | Rf Micro Devices, Inc. | Doherty amplifier configuration for a collector controlled power amplifier |
US7388764B2 (en) | 2005-06-16 | 2008-06-17 | Active-Semi International, Inc. | Primary side constant output current controller |
US7145295B1 (en) * | 2005-07-24 | 2006-12-05 | Aimtron Technology Corp. | Dimming control circuit for light-emitting diodes |
WO2007016373A2 (en) | 2005-07-28 | 2007-02-08 | Synditec, Inc. | Pulsed current averaging controller with amplitude modulation and time division multiplexing for arrays of independent pluralities of light emitting diodes |
WO2007026170A2 (en) | 2005-09-03 | 2007-03-08 | E-Light Limited | Improvements to lighting systems |
US7099163B1 (en) | 2005-11-14 | 2006-08-29 | Bcd Semiconductor Manufacturing Limited | PWM controller with constant output power limit for a power supply |
US7856566B2 (en) * | 2005-11-29 | 2010-12-21 | Power Integrations, Inc. | Standby arrangement for power supplies |
TWI293543B (en) | 2005-12-07 | 2008-02-11 | Ind Tech Res Inst | Illumination brightness and color control system and method thereof |
KR101243402B1 (en) | 2005-12-27 | 2013-03-13 | 엘지디스플레이 주식회사 | Apparatus for driving hybrid backlight of LCD |
US7183957B1 (en) * | 2005-12-30 | 2007-02-27 | Cirrus Logic, Inc. | Signal processing system with analog-to-digital converter using delta-sigma modulation having an internal stabilizer loop |
US7656103B2 (en) | 2006-01-20 | 2010-02-02 | Exclara, Inc. | Impedance matching circuit for current regulation of solid state lighting |
US7310244B2 (en) | 2006-01-25 | 2007-12-18 | System General Corp. | Primary side controlled switching regulator |
ES2647096T3 (en) | 2006-02-10 | 2017-12-19 | Philips Lighting North America Corporation | Methods and apparatus for controlled power delivery with high power factor using a single load switching stage |
US20080018261A1 (en) * | 2006-05-01 | 2008-01-24 | Kastner Mark A | LED power supply with options for dimming |
CN101127495B (en) | 2006-08-16 | 2010-04-21 | 昂宝电子(上海)有限公司 | System and method for switch power supply control |
US7733034B2 (en) | 2006-09-01 | 2010-06-08 | Broadcom Corporation | Single inductor serial-parallel LED driver |
EP1912330B1 (en) | 2006-10-11 | 2009-11-25 | Mitsubishi Electric Information Technology Centre Europe B.V. | Spread-period clock generator |
US20080154679A1 (en) | 2006-11-03 | 2008-06-26 | Wade Claude E | Method and apparatus for a processing risk assessment and operational oversight framework |
US7859859B2 (en) * | 2006-11-20 | 2010-12-28 | Picor Corporation | Primary side sampled feedback control in power converters |
US7902771B2 (en) | 2006-11-21 | 2011-03-08 | Exclara, Inc. | Time division modulation with average current regulation for independent control of arrays of light emitting diodes |
US7675759B2 (en) * | 2006-12-01 | 2010-03-09 | Flextronics International Usa, Inc. | Power system with power converters having an adaptive controller |
US7667986B2 (en) | 2006-12-01 | 2010-02-23 | Flextronics International Usa, Inc. | Power system with power converters having an adaptive controller |
JP2010513944A (en) | 2006-12-13 | 2010-04-30 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Light-emitting diode control method and corresponding optical sensor array, backlight, and liquid crystal display |
JP2008159550A (en) | 2006-12-26 | 2008-07-10 | Toshiba Corp | Backlight control device and backlight control method |
KR101357006B1 (en) | 2007-01-18 | 2014-01-29 | 페어차일드코리아반도체 주식회사 | Converter and the driving method thereof |
US8362838B2 (en) | 2007-01-19 | 2013-01-29 | Cirrus Logic, Inc. | Multi-stage amplifier with multiple sets of fixed and variable voltage rails |
US7288902B1 (en) * | 2007-03-12 | 2007-10-30 | Cirrus Logic, Inc. | Color variations in a dimmable lighting device with stable color temperature light sources |
US7804256B2 (en) | 2007-03-12 | 2010-09-28 | Cirrus Logic, Inc. | Power control system for current regulated light sources |
US7560677B2 (en) | 2007-03-13 | 2009-07-14 | Renaissance Lighting, Inc. | Step-wise intensity control of a solid state lighting system |
GB2447873B (en) | 2007-03-30 | 2009-07-29 | Cambridge Semiconductor Ltd | Forward power converter controllers |
CN101282079B (en) * | 2007-04-05 | 2011-06-01 | 昂宝电子(上海)有限公司 | System and method for power controller |
US7554473B2 (en) * | 2007-05-02 | 2009-06-30 | Cirrus Logic, Inc. | Control system using a nonlinear delta-sigma modulator with nonlinear process modeling |
TW200849778A (en) * | 2007-06-13 | 2008-12-16 | Richtek Technology Corp | Method and device to improve the light-load performance of switching-type converter |
JP4239111B2 (en) | 2007-06-14 | 2009-03-18 | サンケン電気株式会社 | AC-DC converter |
US20090070188A1 (en) | 2007-09-07 | 2009-03-12 | Certus Limited (Uk) | Portfolio and project risk assessment |
CN101414193A (en) * | 2007-10-16 | 2009-04-22 | 鸿富锦精密工业(深圳)有限公司 | Power supply automatic switchover circuit |
US7821333B2 (en) | 2008-01-04 | 2010-10-26 | Texas Instruments Incorporated | High-voltage differential amplifier and method using low voltage amplifier and dynamic voltage selection |
US7872883B1 (en) * | 2008-01-29 | 2011-01-18 | Fairchild Semiconductor Corporation | Synchronous buck power converter with free-running oscillator |
US8008898B2 (en) * | 2008-01-30 | 2011-08-30 | Cirrus Logic, Inc. | Switching regulator with boosted auxiliary winding supply |
US7750738B2 (en) | 2008-11-20 | 2010-07-06 | Infineon Technologies Ag | Process, voltage and temperature control for high-speed, low-power fixed and variable gain amplifiers based on MOSFET resistors |
US7777563B2 (en) | 2008-12-18 | 2010-08-17 | Freescale Semiconductor, Inc. | Spread spectrum pulse width modulation method and apparatus |
US7994863B2 (en) | 2008-12-31 | 2011-08-09 | Cirrus Logic, Inc. | Electronic system having common mode voltage range enhancement |
US8248040B2 (en) * | 2009-11-12 | 2012-08-21 | Polar Semiconductor Inc. | Time-limiting mode (TLM) for an interleaved power factor correction (PFC) converter |
-
2007
- 2007-09-30 US US11/865,032 patent/US7554473B2/en active Active
- 2007-12-31 US US11/967,272 patent/US7888922B2/en active Active
- 2007-12-31 US US11/967,275 patent/US7969125B2/en not_active Expired - Fee Related
- 2007-12-31 US US11/967,277 patent/US7863828B2/en active Active
- 2007-12-31 US US11/967,271 patent/US8040703B2/en not_active Expired - Fee Related
- 2007-12-31 US US11/967,269 patent/US7719246B2/en not_active Expired - Fee Related
- 2007-12-31 US US11/967,273 patent/US7746043B2/en active Active
- 2007-12-31 US US11/967,276 patent/US20080272756A1/en not_active Abandoned
-
2008
- 2008-04-22 WO PCT/US2008/061155 patent/WO2008137315A1/en active Application Filing
- 2008-04-22 CN CN2008800230275A patent/CN101743683B/en active Active
- 2008-04-22 US US12/107,613 patent/US7821237B2/en active Active
- 2008-04-22 AT AT08746551T patent/ATE495569T1/en not_active IP Right Cessation
- 2008-04-22 EP EP08746551A patent/EP2153511B1/en active Active
- 2008-04-22 DE DE602008004510T patent/DE602008004510D1/en active Active
- 2008-04-28 US US12/110,714 patent/US7719248B1/en active Active
- 2008-05-01 US US12/113,536 patent/US8125805B1/en not_active Expired - Fee Related
- 2008-05-02 WO PCT/US2008/062378 patent/WO2008137652A1/en active Application Filing
- 2008-05-02 WO PCT/US2008/062428 patent/WO2008137684A1/en active Application Filing
- 2008-05-02 CN CN200880014472.5A patent/CN101675593B/en active Active
- 2008-05-02 CN CN200880014462A patent/CN101730972A/en active Pending
- 2008-05-02 EP EP08747478.9A patent/EP2151061B1/en active Active
- 2008-05-02 JP JP2010506672A patent/JP2010526496A/en active Pending
- 2008-05-02 EP EP08747479A patent/EP2153512A2/en not_active Withdrawn
- 2008-05-02 US US12/114,130 patent/US8120341B2/en active Active
- 2008-05-02 WO PCT/US2008/062384 patent/WO2008137655A1/en active Application Filing
- 2008-05-02 WO PCT/US2008/062387 patent/WO2008137656A2/en active Application Filing
- 2008-05-02 WO PCT/US2008/062423 patent/WO2008137679A1/en active Application Filing
- 2008-05-02 WO PCT/US2008/062381 patent/WO2008137654A1/en active Application Filing
- 2008-05-02 EP EP08747506A patent/EP2153513A1/en not_active Ceased
- 2008-05-02 US US12/114,147 patent/US7894216B2/en active Active
- 2008-05-02 EP EP08780590A patent/EP2151042A1/en not_active Withdrawn
- 2008-05-02 CN CN2008800145338A patent/CN101720526B/en active Active
- 2008-05-02 CN CN200880014453A patent/CN101675577A/en active Pending
-
2011
- 2011-01-07 US US12/986,761 patent/US20110103111A1/en not_active Abandoned
-
2012
- 2012-01-16 US US13/351,069 patent/US20120194143A1/en not_active Abandoned
Patent Citations (99)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3790878A (en) * | 1971-12-22 | 1974-02-05 | Keithley Instruments | Switching regulator having improved control circuiting |
US3881167A (en) * | 1973-07-05 | 1975-04-29 | Pelton Company Inc | Method and apparatus to maintain constant phase between reference and output signals |
US4075701A (en) * | 1975-02-12 | 1978-02-21 | Messerschmitt-Bolkow-Blohm Gesellschaft Mit Beschrankter Haftung | Method and circuit arrangement for adapting the measuring range of a measuring device operating with delta modulation in a navigation system |
US4334250A (en) * | 1978-03-16 | 1982-06-08 | Tektronix, Inc. | MFM data encoder with write precompensation |
US4414493A (en) * | 1981-10-06 | 1983-11-08 | Thomas Industries Inc. | Light dimmer for solid state ballast |
US4476706A (en) * | 1982-01-18 | 1984-10-16 | Delphian Partners | Remote calibration system |
US4700188A (en) * | 1985-01-29 | 1987-10-13 | Micronic Interface Technologies | Electric power measurement system and hall effect based electric power meter for use therein |
US4737658A (en) * | 1985-08-05 | 1988-04-12 | Brown, Boveri & Cie Ag | Centralized control receiver |
US4677366A (en) * | 1986-05-12 | 1987-06-30 | Pioneer Research, Inc. | Unity power factor power supply |
US4683529A (en) * | 1986-11-12 | 1987-07-28 | Zytec Corporation | Switching power supply with automatic power factor correction |
US4797633A (en) * | 1987-03-20 | 1989-01-10 | Video Sound, Inc. | Audio amplifier |
US4994952A (en) * | 1988-02-10 | 1991-02-19 | Electronics Research Group, Inc. | Low-noise switching power supply having variable reluctance transformer |
US4979087A (en) * | 1988-09-09 | 1990-12-18 | Aviation Limited | Inductive coupler |
US4940929A (en) * | 1989-06-23 | 1990-07-10 | Apollo Computer, Inc. | AC to DC converter with unity power factor |
US4992919A (en) * | 1989-12-29 | 1991-02-12 | Lee Chu Quon | Parallel resonant converter with zero voltage switching |
US5206540A (en) * | 1991-05-09 | 1993-04-27 | Unitrode Corporation | Transformer isolated drive circuit |
US5274890A (en) * | 1992-01-10 | 1994-01-04 | Takata Corporation | Seat belt tongue retaining device |
US5323157A (en) * | 1993-01-15 | 1994-06-21 | Motorola, Inc. | Sigma-delta digital-to-analog converter with reduced noise |
US5638265A (en) * | 1993-08-24 | 1997-06-10 | Gabor; George | Low line harmonic AC to DC power supply |
US5383109A (en) * | 1993-12-10 | 1995-01-17 | University Of Colorado | High power factor boost rectifier apparatus |
US5565761A (en) * | 1994-09-02 | 1996-10-15 | Micro Linear Corp | Synchronous switching cascade connected offline PFC-PWM combination power converter controller |
US5747977A (en) * | 1995-03-30 | 1998-05-05 | Micro Linear Corporation | Switching regulator having low power mode responsive to load power consumption |
US5691890A (en) * | 1995-12-01 | 1997-11-25 | International Business Machines Corporation | Power supply with power factor correction circuit |
US6072969A (en) * | 1996-03-05 | 2000-06-06 | Canon Kabushiki Kaisha | Developing cartridge |
US5781040A (en) * | 1996-10-31 | 1998-07-14 | Hewlett-Packard Company | Transformer isolated driver for power transistor using frequency switching as the control signal |
US6084450A (en) * | 1997-01-14 | 2000-07-04 | The Regents Of The University Of California | PWM controller with one cycle response |
US5946202A (en) * | 1997-01-24 | 1999-08-31 | Baker Hughes Incorporated | Boost mode power conversion |
US5952849A (en) * | 1997-02-21 | 1999-09-14 | Analog Devices, Inc. | Logic isolator with high transient immunity |
US7050509B2 (en) * | 1997-04-22 | 2006-05-23 | Silicon Laboratories Inc. | Digital isolation system with hybrid circuit in ADC calibration loop |
US7003023B2 (en) * | 1997-04-22 | 2006-02-21 | Silicon Laboratories Inc. | Digital isolation system with ADC offset calibration |
US20020150151A1 (en) * | 1997-04-22 | 2002-10-17 | Silicon Laboratories Inc. | Digital isolation system with hybrid circuit in ADC calibration loop |
US6211627B1 (en) * | 1997-07-29 | 2001-04-03 | Michael Callahan | Lighting systems |
US5963086A (en) * | 1997-08-08 | 1999-10-05 | Velodyne Acoustics, Inc. | Class D amplifier with switching control |
US7064498B2 (en) * | 1997-08-26 | 2006-06-20 | Color Kinetics Incorporated | Light-emitting diode based products |
US7135824B2 (en) * | 1997-08-26 | 2006-11-14 | Color Kinetics Incorporated | Systems and methods for controlling illumination sources |
US6150774A (en) * | 1997-08-26 | 2000-11-21 | Color Kinetics, Incorporated | Multicolored LED lighting method and apparatus |
US6211626B1 (en) * | 1997-08-26 | 2001-04-03 | Color Kinetics, Incorporated | Illumination components |
US6788011B2 (en) * | 1997-08-26 | 2004-09-07 | Color Kinetics, Incorporated | Multicolored LED lighting method and apparatus |
US6967448B2 (en) * | 1997-08-26 | 2005-11-22 | Color Kinetics, Incorporated | Methods and apparatus for controlling illumination |
US6888322B2 (en) * | 1997-08-26 | 2005-05-03 | Color Kinetics Incorporated | Systems and methods for color changing device and enclosure |
US6016038A (en) * | 1997-08-26 | 2000-01-18 | Color Kinetics, Inc. | Multicolored LED lighting method and apparatus |
US6806659B1 (en) * | 1997-08-26 | 2004-10-19 | Color Kinetics, Incorporated | Multicolored LED lighting method and apparatus |
US5966297A (en) * | 1997-08-28 | 1999-10-12 | Iwatsu Electric Co., Ltd. | Large bandwidth analog isolation circuit |
US6873065B2 (en) * | 1997-10-23 | 2005-03-29 | Analog Devices, Inc. | Non-optical signal isolator |
US5929400A (en) * | 1997-12-22 | 1999-07-27 | Otis Elevator Company | Self commissioning controller for field-oriented elevator motor/drive system |
US5900683A (en) * | 1997-12-23 | 1999-05-04 | Ford Global Technologies, Inc. | Isolated gate driver for power switching device and method for carrying out same |
US6509913B2 (en) * | 1998-04-30 | 2003-01-21 | Openwave Systems Inc. | Configurable man-machine interface |
US6083276A (en) * | 1998-06-11 | 2000-07-04 | Corel, Inc. | Creating and configuring component-based applications using a text-based descriptive attribute grammar |
US6385063B1 (en) * | 1998-06-23 | 2002-05-07 | Siemens Aktiengesellschaft | Hybrid filter for an alternating current network |
US6344811B1 (en) * | 1999-03-16 | 2002-02-05 | Audio Logic, Inc. | Power supply compensation for noise shaped, digital amplifiers |
US7158633B1 (en) * | 1999-11-16 | 2007-01-02 | Silicon Laboratories, Inc. | Method and apparatus for monitoring subscriber loop interface circuitry power dissipation |
US7255457B2 (en) * | 1999-11-18 | 2007-08-14 | Color Kinetics Incorporated | Methods and apparatus for generating and modulating illumination conditions |
US6583560B1 (en) * | 1999-11-26 | 2003-06-24 | Pioneer Corporation | Plasma display panel |
US6246183B1 (en) * | 2000-02-28 | 2001-06-12 | Litton Systems, Inc. | Dimmable electrodeless light source |
US6882552B2 (en) * | 2000-06-02 | 2005-04-19 | Iwatt, Inc. | Power converter driven by power pulse and sense pulse |
US6304473B1 (en) * | 2000-06-02 | 2001-10-16 | Iwatt | Operating a power converter at optimal efficiency |
US6636003B2 (en) * | 2000-09-06 | 2003-10-21 | Spectrum Kinetics | Apparatus and method for adjusting the color temperature of white semiconduct or light emitters |
US6407691B1 (en) * | 2000-10-18 | 2002-06-18 | Cirrus Logic, Inc. | Providing power, clock, and control signals as a single combined signal across an isolation barrier in an ADC |
US20040046683A1 (en) * | 2001-03-08 | 2004-03-11 | Shindengen Electric Manufacturing Co., Ltd. | DC stabilized power supply |
US6713974B2 (en) * | 2002-01-10 | 2004-03-30 | Lightech Electronic Industries Ltd. | Lamp transformer for use with an electronic dimmer and method for use thereof for reducing acoustic noise |
US6870325B2 (en) * | 2002-02-22 | 2005-03-22 | Oxley Developments Company Limited | Led drive circuit and method |
US6894471B2 (en) * | 2002-05-31 | 2005-05-17 | St Microelectronics S.R.L. | Method of regulating the supply voltage of a load and related voltage regulator |
US6860628B2 (en) * | 2002-07-17 | 2005-03-01 | Jonas J. Robertson | LED replacement for fluorescent lighting |
US6781351B2 (en) * | 2002-08-17 | 2004-08-24 | Supertex Inc. | AC/DC cascaded power converters having high DC conversion ratio and improved AC line harmonics |
US6940733B2 (en) * | 2002-08-22 | 2005-09-06 | Supertex, Inc. | Optimal control of wide conversion ratio switching converters |
US20040232971A1 (en) * | 2003-03-06 | 2004-11-25 | Denso Corporation | Electrically insulated switching element drive circuit |
US7078963B1 (en) * | 2003-03-21 | 2006-07-18 | D2Audio Corporation | Integrated PULSHI mode with shutdown |
US7075329B2 (en) * | 2003-04-30 | 2006-07-11 | Analog Devices, Inc. | Signal isolators using micro-transformers |
US20040227571A1 (en) * | 2003-05-12 | 2004-11-18 | Yasuji Kuribayashi | Power amplifier circuit |
US20040228116A1 (en) * | 2003-05-13 | 2004-11-18 | Carroll Miller | Electroluminescent illumination for a magnetic compass |
US6956750B1 (en) * | 2003-05-16 | 2005-10-18 | Iwatt Inc. | Power converter controller having event generator for detection of events and generation of digital error |
US6944034B1 (en) * | 2003-06-30 | 2005-09-13 | Iwatt Inc. | System and method for input current shaping in a power converter |
US7161816B2 (en) * | 2003-06-30 | 2007-01-09 | Iwatt Inc. | System and method for input current shaping in a power converter |
US7233135B2 (en) * | 2003-09-29 | 2007-06-19 | Murata Manufacturing Co., Ltd. | Ripple converter |
US6958920B2 (en) * | 2003-10-02 | 2005-10-25 | Supertex, Inc. | Switching power converter and method of controlling output voltage thereof using predictive sensing of magnetic flux |
US7109977B2 (en) * | 2003-10-05 | 2006-09-19 | T2D, Inc. | Slipcover touch input apparatus for displays of computing devices |
US20050218838A1 (en) * | 2004-03-15 | 2005-10-06 | Color Kinetics Incorporated | LED-based lighting network power control methods and apparatus |
US7266001B1 (en) * | 2004-03-19 | 2007-09-04 | Marvell International Ltd. | Method and apparatus for controlling power factor correction |
US20050207190A1 (en) * | 2004-03-22 | 2005-09-22 | Gritter David J | Power system having a phase locked loop with a notch filter |
US20050270813A1 (en) * | 2004-06-04 | 2005-12-08 | Wanfeng Zhang | Parallel current mode control |
US20060022916A1 (en) * | 2004-06-14 | 2006-02-02 | Natale Aiello | LED driving device with variable light intensity |
US7109791B1 (en) * | 2004-07-09 | 2006-09-19 | Rf Micro Devices, Inc. | Tailored collector voltage to minimize variation in AM to PM distortion in a power amplifier |
US7088059B2 (en) * | 2004-07-21 | 2006-08-08 | Boca Flasher | Modulated control circuit and method for current-limited dimming and color mixing of display and illumination systems |
US20060023002A1 (en) * | 2004-08-02 | 2006-02-02 | Oki Electric Industry Co., Ltd. | Color balancing circuit for a display panel |
US7292013B1 (en) * | 2004-09-24 | 2007-11-06 | Marvell International Ltd. | Circuits, systems, methods, and software for power factor correction and/or control |
US7221130B2 (en) * | 2005-01-05 | 2007-05-22 | Fyrestorm, Inc. | Switching power converter employing pulse frequency modulation control |
US7102902B1 (en) * | 2005-02-17 | 2006-09-05 | Ledtronics, Inc. | Dimmer circuit for LED |
US20060226795A1 (en) * | 2005-04-08 | 2006-10-12 | S.C. Johnson & Son, Inc. | Lighting device having a circuit including a plurality of light emitting diodes, and methods of controlling and calibrating lighting devices |
US20060261754A1 (en) * | 2005-05-18 | 2006-11-23 | Samsung Electro-Mechanics Co., Ltd. | LED driving circuit having dimming circuit |
US7106603B1 (en) * | 2005-05-23 | 2006-09-12 | Li Shin International Enterprise Corporation | Switch-mode self-coupling auxiliary power device |
US20070029946A1 (en) * | 2005-08-03 | 2007-02-08 | Yu Chung-Che | APPARATUS OF LIGHT SOURCE AND ADJUSTABLE CONTROL CIRCUIT FOR LEDs |
US20070040512A1 (en) * | 2005-08-17 | 2007-02-22 | Tir Systems Ltd. | Digitally controlled luminaire system |
US20070053182A1 (en) * | 2005-09-07 | 2007-03-08 | Jonas Robertson | Combination fluorescent and LED lighting system |
US7545130B2 (en) * | 2005-11-11 | 2009-06-09 | L&L Engineering, Llc | Non-linear controller for switching power supply |
US20070182699A1 (en) * | 2006-02-09 | 2007-08-09 | Samsung Electro-Mechanics Co., Ltd. | Field sequential color mode liquid crystal display |
US20080192509A1 (en) * | 2007-02-13 | 2008-08-14 | Dhuyvetter Timothy A | Dc-dc converter with isolation |
US20080259655A1 (en) * | 2007-04-19 | 2008-10-23 | Da-Chun Wei | Switching-mode power converter and pulse-width-modulation control circuit with primary-side feedback control |
US20080278132A1 (en) * | 2007-05-07 | 2008-11-13 | Kesterson John W | Digital Compensation For Cable Drop In A Primary Side Control Power Supply Controller |
US20090147544A1 (en) * | 2007-12-11 | 2009-06-11 | Melanson John L | Modulated transformer-coupled gate control signaling method and apparatus |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012002824A3 (en) * | 2010-06-29 | 2012-05-18 | Eaton Industries Company | Closed loop control of a cyclo-converter |
WO2012002824A2 (en) * | 2010-06-29 | 2012-01-05 | Eaton Industries Company | Closed loop control of a cyclo-converter |
US9036373B2 (en) | 2010-06-29 | 2015-05-19 | Eaton Industries Company | Closed loop control of a cyclo-converter |
US8829869B2 (en) * | 2011-11-08 | 2014-09-09 | Lincoln Global, Inc. | Dynamic power factor correction and dynamic control for converter in power supply |
US20130114306A1 (en) * | 2011-11-08 | 2013-05-09 | Lincoln Global, Inc. | Dynamic power factor correction and dynamic control for converter in power supply |
US20140009982A1 (en) * | 2012-07-05 | 2014-01-09 | Delta Electronics, Inc. | Feedback control circuit for power converter and power converter system |
DE102012108011A1 (en) * | 2012-08-30 | 2014-03-06 | Infineon Technologies Austria Ag | Switching circuit for controlling switch in switching converter, has control circuit that provides control signal, on basis of generated synchronization signal, for controlling switch in switching converter |
US20170163142A1 (en) * | 2015-05-21 | 2017-06-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Switched mode power supply compensation loop |
US9923450B2 (en) * | 2015-05-21 | 2018-03-20 | Telefonaktiebolaget L M Ericsson (Publ) | Switched mode power supply compensation loop |
US10390393B2 (en) * | 2015-12-22 | 2019-08-20 | Silergy Semiconductor Technology (Hangzhou) Ltd | Ripple suppression circuit, suppression method and LED lighting apparatus |
US11616435B2 (en) * | 2016-08-05 | 2023-03-28 | Rohm Co., Ltd. | Power supply controller with a load line compensator |
CN109245575A (en) * | 2018-10-23 | 2019-01-18 | 中国船舶重工集团公司第七二三研究所 | A kind of VIENNA rectifier stochastical sampling method |
US20220158546A1 (en) * | 2020-11-16 | 2022-05-19 | Nexgen Power Systems, Inc. | Nonlinear, discrete time control of power factor correction power converter |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20080272756A1 (en) | Power factor correction controller with digital fir filter output voltage sampling | |
EP2919374B1 (en) | Duty-ratio controller | |
RU2498487C2 (en) | Frequency converter and voltage stabiliser for uninterrupted power supply | |
US7893674B2 (en) | Switch mode power supply (SMPS) and methods thereof | |
US10110112B2 (en) | Switched mode power supply compensation loop | |
US8929106B2 (en) | Monotonic pre-bias start-up of a DC-DC converter | |
KR101032760B1 (en) | Multiple output switching power supply | |
EP1085647A2 (en) | Compensation circuit, method of operation thereof and converter employing the same | |
US20020144163A1 (en) | System and method for highly phased power regulation using adaptive compensation control | |
JP2018085926A (en) | Constant power/current control method and device for switching mode power converter | |
US7813149B2 (en) | System and method for power saving conversion topology in switch mode power supplies | |
US10103636B1 (en) | Single-stage power converter with power factor correction | |
US20150364989A1 (en) | Power factor correction circuit for a power electronic system | |
US7626369B2 (en) | Switch mode power converter | |
EP1081834B1 (en) | Methods of operating step-up DC current converters and step-up DC voltage converters | |
US9900938B2 (en) | LED lighting circuit with ripple reducer | |
US8576596B2 (en) | Systems and methods for off-time control in a voltage converter | |
CN109921627B (en) | Apparatus and method for limiting electromagnetic interference in a switching converter | |
EP1520336B1 (en) | Dc-dc converter | |
CN210536999U (en) | Adjustable resistor, chip, circuit system, current ripple eliminating circuit and line voltage compensating circuit | |
US11444540B1 (en) | Loop gain compensation of interleaved boost converter using cycle time | |
CN209767379U (en) | Current ripple removing circuit, chip and circuit system | |
TWI796077B (en) | Method and circuit of automatic mode-switching for dc-dc converter | |
US9923450B2 (en) | Switched mode power supply compensation loop | |
US7924584B1 (en) | Power supply switching circuit for a halogen lamp |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CIRRUS LOGIC, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MELANSON, JOHN L.;REEL/FRAME:020416/0958 Effective date: 20080104 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |