CN1764342B - Electronic ballast and its IC power supply method - Google Patents
Electronic ballast and its IC power supply method Download PDFInfo
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- CN1764342B CN1764342B CN2004100361379A CN200410036137A CN1764342B CN 1764342 B CN1764342 B CN 1764342B CN 2004100361379 A CN2004100361379 A CN 2004100361379A CN 200410036137 A CN200410036137 A CN 200410036137A CN 1764342 B CN1764342 B CN 1764342B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/2825—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage
- H05B41/2828—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage using control circuits for the switching elements
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- 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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Abstract
The invention discloses a power supply method for electronic ballast and its IC, which comprises: sampling on load oscillating circuit by sample circuit end, and supplying power to the IC with sampled electric signal by power supply end of power sample circuit. Wherein, the main circuit of the electronic ballast comprises a rectification filter circuit, a power factor correction circuit, and a oscillation drive circuit; the sample end and power supply end of the sample circuit connect with load oscillating circuit and IC of main circuit respectively. This invention can prevent working on when no load and burning element.
Description
Technical field
The present invention relates to the circuit arrangement of lamp and the method for supplying power to of IC, particularly relate to the method for supplying power to of a kind of electric ballast and IC thereof.
Background technology
The method of supplying power to of the IC of existing electric ballast is: power supply circuits are electrically connected in the oscillation drive circuit, and by power supply circuits the second integrated chip IC2 in power supply of the first integrated chip IC1 in the oscillation drive circuit and the circuit of power factor correction are powered.
Existing electric ballast as shown in Figure 1, a kind of electric ballast comprises:
Current rectifying and wave filtering circuit 1 ', the electromagnetic interference of its inhibition and blocking-up power supply, and power supply carried out AC-DC conversion, current rectifying and wave filtering circuit 1 ' input be electrically connected on the output of power supply;
Circuit of power factor correction 2 ', its input be electrically connected on current rectifying and wave filtering circuit 1 ' output;
Oscillation drive circuit 3 ', its input be electrically connected on circuit of power factor correction 2 ' output;
Loading oscillation circuit 4 ', it makes the oscillating circuit work of load, loading oscillation circuit 4 ' input be electrically connected on oscillation drive circuit 3 ' output;
Power supply circuits 6 ', its sampling end be electrically connected on oscillation drive circuit 3 ', its feeder ear be electrically connected on circuit of power factor correction 2 ' integrated chip IC2 and oscillation drive circuit 3 ' integrated chip IC1.
Power supply circuits 6 ' in oscillation drive circuit 3 ' middle sampling, and the electric signal source by sampling to circuit of power factor correction 2 ' integrated chip IC2 and oscillation drive circuit 3 ' integrated chip IC1 power supply.
Load 5 ' input be electrically connected on loading oscillation circuit 4 ' output.
The circuit diagram of concrete electric ballast as shown in Figure 2.
Current rectifying and wave filtering circuit 1 ' comprise fuse FUSE, capacitor C 1 ', capacitor C 2 ', the quick resistance NTC of resistance and single phase bridge type rectifier circu Bridge.The earth terminal ground connection of current rectifying and wave filtering circuit 1 ' output.
Circuit of power factor correction 2 ' comprise integrated chip IC2 and improve the power factor correction circuit.Wherein integrated chip IC2 is L6561, and it has 8 pin.Improve the power factor correction circuit comprise resistance R 1 ', resistance R 2 ', capacitor C 3 ', inductive bank L1 ', resistance R 5 ', capacitor C 4 ', diode D1 ', resistance R 6 ', resistance R 7 ', resistance R 8 ', resistance R 9 ', resistance R 10 ', resistance R 11 ', resistance R 12 ', capacitor C 7 ' and switching transistor T1 '.
Oscillation drive circuit 3 ' comprise the first integrated chip IC1 ' and half-bridge driven circuit, the first integrated chip IC1 ' wherein is L6574, it has 16 pin.The half-bridge driven circuit comprise resistance R 13 ', resistance R 14 ', resistance R 15 ', capacitor C 8 ', resistance R 17 ', capacitor C 9 ', diode D3 ', resistance R 18 ', resistance R 19 ', capacitor C 13 ', capacitor C 14 ', resistance R 24 ', capacitor C 15 ', resistance R 25 ', diode D4 ', resistance R 33 ', resistance R 23 ', resistance R 22 ', resistance R 21 ', resistance R 20 ', switching transistor T2 ' and switching transistor T3 '.
Loading oscillation circuit 4 ' comprise resistance R 26 ', inductance L 2 ', capacitor C 17 ', capacitor C 18 ', resistance R 28 ', resistance R 29 ', resistance R 30 ', capacitor C 16 ', resistance R 32 ', resistance R 27 ' and capacitor C 19 '.
Power supply circuits 6 ' comprise resistance R 3 ', resistance R 4 ', capacitor C 5 ', power supply capacitor C 6 ', diode D2 ', voltage-stabiliser tube DZ1 ', resistance R 16 ', capacitor C 11 ', capacitor C 12 ' and capacitor C 20 '.
The pin 8 of L6561 is electrically connected on power supply capacitor C 6 ' the first ends; The pin 12 of L6574 is electrically connected on power supply capacitor C 6 ' the first ends.By to power supply capacitor C 6 ' carry out accumulation of energy, and then L6561 and L6574 are charged.
In above-mentioned electric ballast is in running order, when dismantling fluorescent tube, electric ballast will work under no-load condition, and then even burn the circuit elements device.Half-bridge drive circuit starts earlier, and circuit of power factor correction just starts, and the pre-thermal phenomenon of low power factor will appear in electric ballast.If the electric connection line of fluorescent tube has long enough, should will constitute a big electric capacity by long electric connection line so, the big electric capacity of this formation can burn the circuit elements device of electric ballast.
Summary of the invention
The objective of the invention is to solve the existing problem of above-mentioned prior art, provide a kind of electric ballast that prevents under no-load condition, to work on, and avoid occurring the electric ballast of the pre-thermal phenomenon of low power factor and the method for supplying power to of IC thereof.
The method of supplying power to of electric ballast IC of the present invention adopts following technical scheme: the method for supplying power to of a kind of electric ballast IC, described method is: the sampling end by the power supply sample circuit is sampled at loading oscillation circuit, and this electric signal source that samples is powered to the integrated chip in the main circuit by the feeder ear of power supply sample circuit.
The sampling end of described power supply sample circuit is in the place's of electrical connection sampling of an end with the capacitance of load, and the voltage that samples at this capacitance carried out accumulation of energy by resistance, diode and voltage-stabiliser tube to energy storage capacitor, energy storage capacitor is powered to the first integrated chip IC1 in the oscillation drive circuit.
Described power supply sample circuit is powered to the second integrated chip IC2 in the circuit of power factor correction after the half-bridge vibration of oscillation drive circuit.
IC method of supplying power in the electric ballast of the present invention has adopted above-mentioned technical scheme, both adopted following technical scheme: a kind of electric ballast, comprise main circuit, loading oscillation circuit and power supply sample circuit, wherein main circuit comprises: current rectifying and wave filtering circuit, and its input is electrically connected on the output of power supply; Circuit of power factor correction, its input is electrically connected on the output of current rectifying and wave filtering circuit; And, oscillation drive circuit, its input is electrically connected on the output of circuit of power factor correction;
Loading oscillation circuit, its input is electrically connected on the output of oscillation drive circuit;
The power supply sample circuit, its sampling end is electrically connected on loading oscillation circuit, and its feeder ear is electrically connected the integrated chip in the main circuit.
The feeder ear of described power supply sample circuit is electrically connected on circuit of power factor correction and oscillation drive circuit, and by the electric signal source that samples second integrated chip IC2 of circuit of power factor correction and the first integrated chip IC1 of oscillation drive circuit is powered;
Electric ballast also includes power supply circuits, and it has input and output, and input is electrically connected on oscillation drive circuit, and output is electrically connected the first integrated chip IC1 of oscillation drive circuit.
The feeder ear of described power supply sample circuit is electrically connected on circuit of power factor correction, and passes through the second integrated chip IC2 power supply of the electric signal source of sampling to circuit of power factor correction;
Electric ballast also includes power supply circuits, and it has input and output, and input is electrically connected on oscillation drive circuit, and output is electrically connected the second integrated chip IC2 of circuit of power factor correction.
The feeder ear of described power supply sample circuit is electrically connected on oscillation drive circuit, and passes through the first integrated chip IC1 power supply of the electric signal source of sampling to oscillation drive circuit.
The sampling end of described power supply sample circuit is electrically connected on the place that is electrically connected at an end with the capacitance of load, and energy storage capacitor being carried out accumulation of energy by the voltage that samples at this capacitance, energy storage capacitor is powered to the first integrated chip IC1 in the oscillation drive circuit.
The sampling end of described power supply sample circuit is electrically connected on the place that is electrically connected at an end with the capacitance of load, and energy storage capacitor being carried out accumulation of energy by the voltage that samples at this capacitance, energy storage capacitor is powered to the first integrated chip IC1 in the oscillation drive circuit; The power supply sample circuit is powered to the second integrated chip IC2 in the circuit of power factor correction after the half-bridge vibration of oscillation drive circuit.
By the above-mentioned description of this invention as can be known, compare with background technology, the present invention has following advantage:
One because the sampling end of power supply sample circuit is to sample, can prevent that electric ballast from working on, and prevents to burn the circuit elements device under no-load condition in loading oscillation circuit; Avoid the electric ballast unloaded operation or the pre-thermal phenomenon of low power factor occurs;
They are two years old, the power supply sample circuit, guarantees after the half-bridge vibration of oscillation drive circuit the power supply of the second integrated chip IC2 in the circuit of power factor correction by feeder ear after the half-bridge vibration of oscillation drive circuit, the power factor correction circuit is worked immediately, prevents the low power factor phenomenon; The first integrated chip IC1, the second integrated chip IC2 work simultaneously, avoid first integrated chip IC1 work, and the second integrated chip IC2 do not work, and electric ballast is in low power state; Or, avoid the first integrated chip IC1 not work, and second integrated chip IC2 work, electric ballast burns the circuit elements device easily;
Its three, the sampling end of power supply sample circuit works under no-load condition so can prevent electric ballast in the place's of the electrical connection sampling with capacitance of an end of load, prevents to burn the circuit elements device; Even the electric connection line long enough of fluorescent tube, this long electric connection line constitutes a big electric capacity, because the existence of capacitance, also can stop the big electric capacity of this formation to burn the circuit elements device of electric ballast.
They are four years old, the first integrated chip IC1, power supply capacitances to supply power by the power supply sample circuit, and sampling end is at first end of the inductance of loading oscillation circuit and the node sample between two switching transistors in the oscillation drive circuit, or, the second integrated chip IC2, power supply capacitances to supply power by the power supply sample circuit, and sampling end is at first end of the inductance of loading oscillation circuit and the node sample between two switching transistors in the oscillation drive circuit, can prevent that electric ballast from working on, and prevents to burn the circuit elements device under no-load condition; Avoid the electric ballast unloaded operation or the pre-thermal phenomenon of low power factor occurs;
Its five, the start-up time of circuit of power factor correction and half-bridge drive circuit is identical, avoids electric ballast the pre-thermal phenomenon of low power factor to occur.
Description of drawings
Accompanying drawing 1 is each circuit module connection layout of the electric ballast of prior art;
Accompanying drawing 2 is the circuit diagram of the electric ballast of prior art;
Accompanying drawing 3 is each circuit module connection layout of the electric ballast of embodiments of the invention one;
Accompanying drawing 4 is the circuit diagram of the electric ballast of embodiments of the invention one;
Accompanying drawing 5 is each circuit module connection layout of the electric ballast of embodiments of the invention two
Accompanying drawing 6 is each circuit module connection layout of the electric ballast of embodiments of the invention three.
Embodiment
Embodiment one
The method of supplying power to of a kind of electric ballast IC in the present embodiment, described method is: the sampling end by power supply sample circuit 6 is sampled at loading oscillation circuit 4, and this electric signal source that samples is powered to the integrated chip in the main circuit by the feeder ear of power supply sample circuit 6.
The sampling end of power supply sample circuit 6 is sampled at second end and the capacitance C15 place of electrical connection of load 5, and the voltage of this capacitance C15 is carried out accumulation of energy by resistance R 26, resistance R 25, capacitor C 17, diode D7 and voltage-stabiliser tube DZ1 to the first energy storage capacitor C8; The first energy storage capacitor C8 powers to the first integrated chip L6574 in the oscillation drive circuit.
The power supply circuits 7 of electric ballast IC, it has input and output, and input is electrically connected on oscillation drive circuit 3, and output is electrically connected the second integrated chip L6561 of circuit of power factor correction 2.After the half-bridge vibration of oscillation drive circuit 3, power supply circuits 7 pass through self-energizing pin 16 samplings at the other end of load 5 and L6574, and by resistance R 13, resistance R 14, resistance R 15, power supply capacitor C 6, diode D6 and voltage-stabiliser tube DZ3 the second energy storage capacitor C7 are carried out accumulation of energy; The second energy storage capacitor C7 powers to the second integrated chip L6561 in the circuit of power factor correction 2.
A kind of electric ballast in the present embodiment as shown in Figure 3, comprises main circuit, loading oscillation circuit 4, power supply sample circuit 3 and power supply circuits 7.
Main circuit comprises:
Current rectifying and wave filtering circuit 1, the electromagnetic interference of its inhibition and blocking-up power supply, and power supply is carried out AC-DC change, the input of current rectifying and wave filtering circuit 1 is electrically connected on the output of power supply;
Circuit of power factor correction 2, its input is electrically connected on the output of current rectifying and wave filtering circuit 1;
Oscillation drive circuit 3, its input is electrically connected on the output of circuit of power factor correction 2.
Loading oscillation circuit 4, it makes the oscillating circuit work of load, and the input of loading oscillation circuit 4 is electrically connected on the output of oscillation drive circuit 3.
Load 5, its input is electrically connected on the output of loading oscillation circuit 4.
Power supply sample circuit 6, its sampling end is electrically connected on loading oscillation circuit 4, and its feeder ear is electrically connected the integrated chip in the main circuit.Both, power supply sample circuit 6 had been sampled in loading oscillation circuit 4, and by the electric signal source of sampling the integrated chip in the main circuit was powered.
Power supply sample circuit 6 is sampled at second end and the capacitance C15 place of electrical connection of load 5, and the voltage of this capacitance C15 is carried out accumulation of energy by resistance R 26, resistance R 25, capacitor C 17, diode D7 and voltage-stabiliser tube DZ1 to the first energy storage capacitor C8; The first energy storage capacitor C8 powers to the first integrated chip L6574 in the oscillation drive circuit.
Power supply circuits 7, it has input and output, and input is electrically connected on oscillation drive circuit 3, and output is electrically connected the second integrated chip IC2 of circuit of power factor correction 2.
After the half-bridge vibration of oscillation drive circuit 3, power supply circuits 7 connect node between two switching transistor T2, the T3, and by power supply capacitor C 6, resistance R 13, resistance R 14, resistance R 15, diode D6 and voltage-stabiliser tube DZ3 the second energy storage capacitor C7 are carried out accumulation of energy; The second energy storage capacitor C7 powers to the second integrated chip L6561 in the circuit of power factor correction 2.
The circuit diagram of concrete electric ballast as shown in Figure 4.
Current rectifying and wave filtering circuit 1 comprises fuse FUSE, inductance L 1, capacitor C 1, inductance L 2, capacitor C 2a, capacitor C 2b, diode D1, diode D2, diode D3, diode D4 and capacitor C 3.Diode D1, diode D2, diode D3 and diode D4 form a single phase bridge type rectifier circu.The earth terminal ground connection of current rectifying and wave filtering circuit 1 output.Current rectifying and wave filtering circuit 1 is not further described at this for the circuit of existing current techique.
Circuit of power factor correction 2 comprises integrated chip IC2 and other auxiliary line.Wherein integrated chip IC2 is L6561, and it has 8 pin.Other auxiliary line comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 16, inductive bank L3, capacitor C 4, capacitor C 5, electric capacity E1, diode D5 and switching transistor T1.The circuit of circuit of power factor correction 2 is not further described at this for the circuit of existing current techique.
Oscillation drive circuit 3 comprises the first integrated chip IC1 and half-bridge driven circuit, and the first integrated chip IC1 wherein is L6574, and it has 16 pin.The half-bridge driven circuit comprises resistance R 17, resistance R 18, resistance R 19, resistance R 20, capacitor C 9, capacitor C 10, capacitor C 11, capacitor C 12, capacitor C 13, capacitor C 14, switching transistor T2 and switching transistor T3.The circuit of oscillation drive circuit 3 is not further described at this for the circuit of existing current techique.
Loading oscillation circuit 4 comprises inductive bank L4, resistance R 21, resistance R 22, resistance R 23, resistance R 24, resistance R 27, resistance R 28, resistance R 29, diode D8 and capacitor C 16.The circuit of loading oscillation circuit 4 is not further described at this for the circuit of existing current techique.
Power supply sample circuit 6 comprises:
Capacitance C15, resistance R 25, resistance R 26, capacitor C 17, voltage-stabiliser tube DZ1, diode D7 and the first energy storage capacitor C8.
Power supply circuits 7 comprise power supply capacitor C 6, resistance R 13, resistance R 14, diode D6, voltage-stabiliser tube DZ3, the second energy storage capacitor C7 and resistance R 15.
First end of capacitance C15 is electrically connected on an end of load 5, and second end is electrically connected on the earth terminal of current rectifying and wave filtering circuit 1 output, i.e. ground connection.The sampling end of the first power supply sample circuit 6 is sampled with the capacitance C15 place of electrical connection at an end of load 5.In capacitance C15 sampling, obtain ripple voltage.
Resistance R 25 and resistance R 26 in parallel electrical connections, its common first end is electrically connected on first end of capacitance C15, and its common second end is electrically connected first end of capacitor C 17.
The negative electricity of voltage-stabiliser tube DZ1 is connected in second end of capacitor C 17, and positive electrical is connected in the earth terminal of current rectifying and wave filtering circuit 1 output, i.e. ground connection.
The positive electrical of diode D7 is connected in second end of capacitor C 17, and negative electricity is connected in first end of the first energy storage capacitor C8.
The second end ground connection of the first energy storage capacitor C8, its first end is electrically connected on the supply pin 12 of L6574 simultaneously.
The sampling end of power supply sample circuit 6 is sampled at capacitance C15, and the voltage that samples carried out accumulation of energy by resistance R 25, resistance R 26, capacitor C 17, voltage-stabiliser tube DZ1, diode D7 to the first energy storage capacitor C8, the first energy storage capacitor C8 powers to the L6574 in the oscillation drive circuit 3.
First end of the power supply capacitor C 6 of power supply circuits 7 is an input, and input is electrically connected on first end of the inductance C16 of loading oscillation circuit 4, the switching transistor T2 in the oscillation drive circuit 3 and the node between the switching transistor T3.Second end of inductance C16 is electrically connected on load.First end of the capacitor C of powering simultaneously 6 is electrically connected on the pin 14 of L6574 and second end of capacitor C 9.First end of capacitor C 9 is electrically connected on the pin 16 of L6574.
Resistance R 13 and resistance R 14 in parallel electrical connections, its common first end is electrically connected on second end of power supply capacitor C 6, and its common second end is electrically connected on the negative pole of voltage-stabiliser tube DZ3.The plus earth of voltage-stabiliser tube DZ3.
The positive electrical of diode D6 connects the negative pole of voltage-stabiliser tube DZ3.
The second energy storage capacitor C7 and resistance R 15 in parallel electrical connections, its common first end is electrically connected the negative pole of diode D6, is electrically connected on the supply pin 8 of L6561 simultaneously, its common second end ground connection.
Power supply circuits 7, after the half-bridge vibration of oscillation drive circuit 3, inductive bank L4 by being electrically connected on loading oscillation circuit 4 and the node of switching transistor T2 and switching transistor T3, sample at inductive bank L4, and the second energy storage capacitor C7 being carried out accumulation of energy by power supply capacitor C 6, resistance R 13, resistance R 14, diode D6, voltage-stabiliser tube DZ3, the second energy storage capacitor C7 powers to the L6561 in the circuit of power factor correction 2.
Embodiment two
Present embodiment two is with embodiment one difference: as shown in Figure 5, described method is: the sampling end by power supply sample circuit 6 is sampled at loading oscillation circuit 4, and this electric signal source that samples is powered to the integrated chip in the main circuit by the feeder ear of power supply sample circuit 6.
The sampling end of power supply sample circuit 6 is sampled at second end and the capacitance C15 place of electrical connection of load 5, and the voltage of this capacitance C15 is carried out accumulation of energy by resistance R 26, resistance R 25, capacitor C 17, diode D7 and voltage-stabiliser tube DZ1 to the first energy storage capacitor C8; The first energy storage capacitor C8 powers to the second integrated chip L6561 in the circuit of power factor correction 2.
The power supply circuits 7 of electric ballast IC, it has input and output, and input is electrically connected on oscillation drive circuit 3, and output is electrically connected the first integrated chip L6574 in the oscillation drive circuit.After the half-bridge vibration of oscillation drive circuit 3, power supply circuits 7 connect node between two switching transistor T2, the T3, and by power supply capacitor C 6, resistance R 13, resistance R 14, resistance R 15, diode D6 and voltage-stabiliser tube DZ3 the second energy storage capacitor C7 are carried out accumulation of energy; The second energy storage capacitor C7 powers to the first integrated chip L6574 in the circuit of power factor correction 2.
But the concrete circuit diagram reference example one of present embodiment two.
Embodiment three
Present embodiment three is with embodiment one difference: as shown in Figure 6, described method is: the sampling end by power supply sample circuit 6 is sampled at loading oscillation circuit 4, and this electric signal source that samples is powered to the integrated chip in the main circuit by the feeder ear of power supply sample circuit 6.
The sampling end of power supply sample circuit 6 is sampled at second end and the capacitance C15 place of electrical connection of load 5, and the voltage of this capacitance C15 is carried out accumulation of energy by resistance R 26, resistance R 25, capacitor C 17, diode D7 and voltage-stabiliser tube DZ1 to the first energy storage capacitor C8; The first energy storage capacitor C8 powers to the first integrated chip L6574 in the oscillation drive circuit.
The sampling end of power supply sample circuit 6 is sampled at second end and the capacitance C15 place of electrical connection of load 5, and the voltage of this capacitance C15 is carried out accumulation of energy by resistance R 26, resistance R 25, capacitor C 17, diode D7 and voltage-stabiliser tube DZ1 to the first energy storage capacitor C8; The first energy storage capacitor C8 powers to the second integrated chip L6561 in the circuit of power factor correction 2.
But the concrete circuit diagram reference example one of present embodiment three.
The above, only for preferred embodiment of the present invention, so can not limit scope of the invention process with this, i.e. the equivalence of doing according to the present patent application claim and description changes and modification, all should still belong in the scope that patent of the present invention contains.
Claims (2)
1. the method for supplying power to of an electric ballast IC is characterized in that:
The circuit that described method is used comprises main circuit, loading oscillation circuit and power supply sample circuit;
Described main circuit comprises:
Current rectifying and wave filtering circuit, its input is electrically connected on the output of power supply;
Circuit of power factor correction, its input is electrically connected on the output of current rectifying and wave filtering circuit; And
Oscillation drive circuit, its input is electrically connected on the output of circuit of power factor correction;
Described loading oscillation circuit input is electrically connected on the output of oscillation drive circuit;
The power supply sample circuit, its sampling end is electrically connected on loading oscillation circuit, and its feeder ear is electrically connected first integrated chip (IC1) and second integrated chip (IC2) in the main circuit;
Described method is: the sampling end by the power supply sample circuit is sampled at loading oscillation circuit, and this electric signal source that samples is powered to first integrated chip (IC1) in the main circuit and second integrated chip (IC2) by the feeder ear of power supply sample circuit; The sampling end of described power supply sample circuit is in the place's of electrical connection sampling of an end with the capacitance of load, and the voltage that samples at this capacitance carried out accumulation of energy by resistance, diode and voltage-stabiliser tube to energy storage capacitor, energy storage capacitor is powered to first integrated chip (IC1) in the oscillation drive circuit; Described power supply sample circuit is powered to second integrated chip (IC2) in the circuit of power factor correction after the half-bridge vibration of oscillation drive circuit.
2. electric ballast, it is characterized in that: it comprises main circuit, loading oscillation circuit and power supply sample circuit, and wherein main circuit comprises: current rectifying and wave filtering circuit, its input is electrically connected on the output of power supply; Circuit of power factor correction, its input is electrically connected on the output of current rectifying and wave filtering circuit; And, oscillation drive circuit, its input is electrically connected on the output of circuit of power factor correction;
Loading oscillation circuit, its input is electrically connected on the output of oscillation drive circuit;
The power supply sample circuit, its sampling end is electrically connected on loading oscillation circuit, and its feeder ear is electrically connected the integrated chip in the main circuit; The feeder ear of described power supply sample circuit is electrically connected on circuit of power factor correction and oscillation drive circuit, and by the electric signal source that samples second integrated chip (IC2) of circuit of power factor correction and first integrated chip (IC1) of oscillation drive circuit is powered; The sampling end of described power supply sample circuit is electrically connected on the place that is electrically connected at an end with the capacitance of load, and energy storage capacitor being carried out accumulation of energy by the voltage that samples at this capacitance, energy storage capacitor is powered to first integrated chip (IC1) in the oscillation drive circuit; The power supply sample circuit is powered to second integrated chip (IC2) in the circuit of power factor correction after the half-bridge vibration of oscillation drive circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2004100361379A CN1764342B (en) | 2004-10-22 | 2004-10-22 | Electronic ballast and its IC power supply method |
| PCT/CN2005/000112 WO2006042447A1 (en) | 2004-10-22 | 2005-01-26 | An electronic ballast and its ic supply method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2004100361379A CN1764342B (en) | 2004-10-22 | 2004-10-22 | Electronic ballast and its IC power supply method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1764342A CN1764342A (en) | 2006-04-26 |
| CN1764342B true CN1764342B (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004100361379A Expired - Fee Related CN1764342B (en) | 2004-10-22 | 2004-10-22 | Electronic ballast and its IC power supply method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1764342B (en) |
| WO (1) | WO2006042447A1 (en) |
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| CN2305030Y (en) * | 1996-06-21 | 1999-01-20 | 李福文 | Electronic ballast for halogen lamp |
| CN2333138Y (en) * | 1998-05-12 | 1999-08-11 | 北京国际技术合作中心 | High strength gas discharge lamp electronic ballast |
| CN2364654Y (en) * | 1999-01-18 | 2000-02-16 | 李名酉 | Electronic ballast for high intensity gas discharge lamp |
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2004
- 2004-10-22 CN CN2004100361379A patent/CN1764342B/en not_active Expired - Fee Related
-
2005
- 2005-01-26 WO PCT/CN2005/000112 patent/WO2006042447A1/en active Application Filing
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| US5872429A (en) * | 1995-03-31 | 1999-02-16 | Philips Electronics North America Corporation | Coded communication system and method for controlling an electric lamp |
| CN2372864Y (en) * | 1998-08-31 | 2000-04-05 | 陈永真 | Inverter for fluorescent lamp |
| CN2517223Y (en) * | 2001-10-18 | 2002-10-16 | 上海复旦微电子股份有限公司 | Preheating starting and overcurrent protection control device of electric ballast |
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| 毛兴武,王小民.基于BL8301的28W TL5双管荧光灯电子镇流器.灯与照明第28卷 第3期.2004,第28卷(第3期),第58-61页,图2-3. * |
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| WO2006042447A1 (en) | 2006-04-27 |
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