CN102510648A - Electronic ballast and energy saving lamp adopting same - Google Patents
Electronic ballast and energy saving lamp adopting same Download PDFInfo
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- CN102510648A CN102510648A CN201110341345XA CN201110341345A CN102510648A CN 102510648 A CN102510648 A CN 102510648A CN 201110341345X A CN201110341345X A CN 201110341345XA CN 201110341345 A CN201110341345 A CN 201110341345A CN 102510648 A CN102510648 A CN 102510648A
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- 239000003990 capacitor Substances 0.000 claims description 71
- 238000001914 filtration Methods 0.000 claims description 31
- 238000004804 winding Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 5
- 238000004146 energy storage Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000005286 illumination Methods 0.000 description 5
- 239000002360 explosive Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
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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
- 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
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The invention discloses an electronic ballast and an energy saving lamp adopting the same and belongs to a lighting startup device. The ballast is provided with an active filter circuit, a rectification filter circuit connected with the active filter circuit, a high-frequency resonance circuit connected with the rectification filter circuit, and a load circuit connected with the high-frequency resonance circuit; a power factor correction circuit is connected between the rectification filter circuit and the high-frequency resonance circuit; and a negative feedback circuit is connected between the high-frequency resonance circuit and the load circuit. The electronic ballast is adopted by an illuminating lamp. The electronic ballast has the advantages of interference resistance, high power factor, high safety and reliability and long service life.
Description
Technical field
The present invention relates to a kind of startup lighting apparatus, specifically is a kind of electric ballast and the electricity-saving lamp that adopts this electric ballast, can be used for general lighting, is specially adapted to the illumination in the inflammable and explosive environment such as mine, petrochemical industry.
Background technology
Existing electric ballast, its power factor is low, power consumption is high, poor anti jamming capability and reliability are low, is not suitable on the illuminating lamp of inflammable and explosive particular surroundingss such as mine, petrochemical industry.Because need, the illuminating lamp under the ore deposit is in illumination condition always, because the power factor of ballast is low, power consumption is high, in the useful life of having reduced illuminating lamp, needs often to change fluorescent tube.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the present invention provides a kind of electric ballast and adopts the electricity-saving lamp of this electric ballast; Anti-tampering, power factor is high, and safe and reliable life time is long.
The present invention realizes with following technical scheme: a kind of electric ballast comprises a power filter, the current rectifying and wave filtering circuit that is connected with active filter circuit, the high-frequency circuit that is connected with current rectifying and wave filtering circuit, the load circuit that is connected with high-frequency circuit; Between current rectifying and wave filtering circuit and high-frequency circuit, connect a circuit of power factor correction; Between high-frequency circuit and load circuit, connect a negative-feedback circuit.
It further is: the π type active filter circuit that described active filter circuit is made up of transformer T1, inductance L 2 and capacitor C X1, CX2, CX3, CY1, CY2; One end of inductance L 2 is connected with the winding of transformer T1; The other end is through capacitor C Y1 ground connection; Be connected in parallel on the two ends of capacitor C Y1 after capacitor C Y2, the CX3 series connection; Capacitor C X1 is connected in parallel on the two ends of power supply, and capacitor C X2 one end is connected between inductance L 2 and the transformer, and the other end is connected with the secondary winding of transformer T1; The common port of the common port of inductance L 2 and capacitor C Y1 and capacitor C Y2, CX3 is connected to current rectifying and wave filtering circuit.
Described current rectifying and wave filtering circuit comprises bridge heap module DB175S and capacitor C 1, and an end of capacitor C 1 is connected other end ground connection with bridge heap module DB175S.
Described circuit of power factor correction comprises integrated chip L6562, transformer T2, FET Q1, diode D1, D3, a plurality of electric capacity and a plurality of resistance; The electric capacity, the resistance that connect parallel connection between 1 pin of integrated chip L6562 and 2 pin; The step-down branch road that 3 pin are formed through a plurality of resistance is connected with current rectifying and wave filtering circuit, and 5 pin are connected with an end of transformer T2 secondary winding, the other end ground connection of this secondary winding; One end of its winding is connected with current rectifying and wave filtering circuit; The anode of other end diode D3 connects, and its negative electrode is through capacity earth, and 7 pin of integrated chip L6562 are connected with the grid of FET Q1; Its drain electrode is connected with 4 pin of integrated chip L6562 and through grounding through resistance, source electrode is connected with the anode of triode D3; 8 pin of integrated chip L6562 are connected with the negative electrode of diode D1, and its anode is connected with high-frequency circuit.
Described high-frequency circuit comprises integrated chip IPM3256, FET Q2, Q3; Capacitor C 7, C8, C9 are the parallelly connected filter branch of integrated chip IPM3256, connect as the clamped branch road of integrated chip IPM3256 with capacitor C 10 after resistance R 14, the R15 parallel connection, and capacitor C 11 constitutes the energy storage branch road; 10 pin connect the leakage of FET Q3; 11 pin connect the grid of FET Q3, and 12,14 pin connect the drain electrode of source electrode and the FET Q2 of FET Q3, and 13 pin connect the grid of FET Q2; The source electrode of FET Q2 connects the 400V power supply, and 2 pin and 3 pin connect power supply; 9 pin and 12 pin of integrated chip IPM3256 connect negative-feedback circuit.
Described negative-feedback circuit comprise have three-winding transformer T3 and capacitor C 17, C18, C19; Main winding one end of transformer T3 is connected with high-frequency circuit; The other end is connected with fluorescent tube through capacitor C 17, an end ground connection of an auxiliary winding, and the other end connects fluorescent tube through capacitor C 19; One termination fluorescent tube of secondary auxiliary winding, the other end connects fluorescent tube through capacitor C 18; The public termination high-frequency circuit of capacitor C 19 and fluorescent tube.
A kind of electricity-saving lamp comprises shell, adopts above-mentioned electric ballast.
Shell adopts high-strength nylon material PA66 to process.
The invention has the beneficial effects as follows:
1, wide-voltage constant power is applicable to particular surroundings;
2, have overvoltage, cross stay, high temperature, no-load protection function, guarantee light fixture, operational environment;
3, circuit of power factor correction adopts modularized design, and its caloric value is little, power consumption is low, and power factor can
Bring up to 0.995～0.999;
4, have EMI anti-interference function;
5, adopt large scale integrated circuit, guarantees contactless, ultralow temperature, low-power consumption, senseless anger, avoid danger;
6, adopted startup slowly, made the whole lamp life-span improve 2 times than other same specification products, the life-span of electronics core reaches 100,000 hours, beats the frequency that reduces the wastage and change fluorescent tube greatly.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further.
Accompanying drawing is a circuit diagram of the present invention.
Embodiment
Shown in accompanying drawing, a kind of electric ballast has a power filter; The current rectifying and wave filtering circuit that is connected with active filter circuit; The high-frequency circuit that is connected with current rectifying and wave filtering circuit, the negative-feedback circuit that is connected with the high-frequency circuit circuit, the load circuit that is connected with negative-feedback circuit; Between current rectifying and wave filtering circuit and high-frequency circuit, connect a circuit of power factor correction.
The π type active filter circuit that active filter circuit is made up of transformer T1, inductance L 2 and capacitor C X1, CX2, CX3, CY1, CY2; One end of inductance L 2 is connected with the winding of transformer T1; The other end is through capacitor C Y1 ground connection; Be connected in parallel on the two ends of capacitor C Y1 after capacitor C Y2, the CX3 series connection; Capacitor C X1 is connected in parallel on the two ends of power supply, and capacitor C X2 one end is connected between inductance L 2 and the transformer, and the other end is connected with the secondary winding of transformer T1; The common port of the common port of inductance L 2 and capacitor C Y1 and capacitor C Y2, CX3 is connected to current rectifying and wave filtering circuit.Filtering input power supply clutter is to the interference EMC of circuit, but filtering harmonic is to the pollution EMI of electrical network.
Current rectifying and wave filtering circuit comprises bridge heap module DB175S and capacitor C 1, and an end of capacitor C 1 is connected other end ground connection with bridge heap module DB175S.Current rectifying and wave filtering circuit is reverse into d. c. voltage signal with the alternating current of active filter circuit output.
Circuit of power factor correction comprises integrated chip L6562, transformer T2, FET Q1, diode D1, D3, a plurality of electric capacity and a plurality of resistance; The capacitor C 5, the resistance R 6 that connect parallel connection between 1 pin of integrated chip L6562 and 2 pin, series resistance R1, R2, R3 form the step-down branch road and are connected the common port of 3 pin connecting resistance R2, R3 with current rectifying and wave filtering circuit; 5 pin are connected with an end of transformer T2 secondary winding; The other end ground connection of this secondary winding, an end of its winding is connected with current rectifying and wave filtering circuit, and the anode of other end diode D3 connects; Its negative electrode is the output of 400V power supply; 7 pin of integrated chip L6562 are connected with the grid of FET Q1, and its drain electrode is connected with 4 pin of integrated chip L6562 and through resistance R 8 ground connection, source electrode is connected with the anode of triode D3; 8 pin of integrated chip L6562 are connected with the negative electrode of diode D1, and its anode connects 15 power supplys.This circuit carries out power factor to input current and promotes, and reduces harmonic wave and crest ratio, suppresses harmonic content, makes input current near sinusoidal wave, reaches the purpose that improves the power factor saves energy.
High-frequency circuit comprises integrated chip IPM3256, FET Q2, Q3; Capacitor C 7, C8, C9 are the parallelly connected filter branch of integrated chip IPM3256, connect as the clamped branch road of integrated chip IPM3256 with capacitor C 10 after resistance R 14, the R15 parallel connection, and capacitor C 11 constitutes the energy storage branch road.10 pin of integrated chip IPM3256 connect the drain electrode of FET Q3; 11 pin connect the grid of FET Q3, and 12,14 pin connect the drain electrode of source electrode and the FET Q2 of FET Q3, and 13 pin connect the grid of FET Q2; The source electrode of FET Q2 connects the 400V power supply, and 2 pin and 3 pin connect power supply; 9 pin and 12 pin of integrated chip IPM3256 connect negative-feedback circuit.You become the required high-frequency ac voltage of load to the high-quality direct voltage that this circuit is imported front end once more, form up to the 38KHZ-45KHZ high-frequency signal, and power consumption are little, temperature rise is low, improve the whole lamp life-span simultaneously.Circuit adopts the delayed startup function to fluorescent tube, produces series resonance through this shop road and supplies the required high-frequency and high-voltage power supply of fluorescent tube, activates tube starting, and the assurance circuit is worked continually and steadily.High-frequency circuit has used integrated chip IPM3256, has very strong no-load protection function, in the appearance of fluorescent tube damaged and other when destroying, circuit can detect adjustment automatically, load restoration is known in termination work.
Negative-feedback circuit comprise have three-winding transformer T3 and capacitor C 17, C18, C19; Main winding one end of transformer T3 is connected with high-frequency circuit; The other end is connected with fluorescent tube through capacitor C 17, an end ground connection of an auxiliary winding, and the other end connects fluorescent tube through capacitor C 19; One termination fluorescent tube of secondary auxiliary winding, the other end connects fluorescent tube through capacitor C 18; The public termination high-frequency circuit of capacitor C 19 and fluorescent tube.The one termination capacitor C17 of capacitor C 16 and the common port of transformer main winding, other end ground connection.Between load circuit and high-frequency circuit, insert a negative-feedback circuit, prevent that FET Q2, Q3 and overvoltage from crossing to stay, prevent that circuit high temperature from satisfying user demand.Has the permanent power output of wide voltage (120V-150V); The illumination of stable operation environment; It is unstable can not occur the illumination that other light fixture shows because of voltage ripple of power network, neglects secretly brightly suddenly, and integrated chip IPM3256 provides a wide load to match function automatically simultaneously.When load specification was in short supply and inconsistent, inside circuit is the adjustment parameter automatically, provide a best signal of telecommunication by lamp works in optimum state, guarantee its power, illumination life-span and environment for use simultaneously.
A kind of electricity-saving lamp adopts above-mentioned electric ballast.In the present embodiment, the shell of electricity-saving lamp adopts high-strength nylon material PA66 to process, and reaches the function of fire-resistant antistatic, is particularly suitable for inflammable and explosive particular surroundings illuminating lamps such as mine, petrochemical industry.
Operation principle: the 220V power supply is through three-plug connector, and fuse enters into the lamp interior circuit.Transformer T1, inductance L 2 and capacitor C X1, CX2, CX3, CY1, CY2 constitute π type active filter circuit; π type active filter circuit constitutes an electromagnetic interface filter; The clutter that filtering input power supply carries and the interference of internal circuit; Also the filtering circuit harmonic wave reaches the standard of national electromagnetic compatibility (EMC) to the pollution of electrical network simultaneously.The power supply of handling through π type active filter circuit gets into back rectifier bridge heap DB175S, lets ac signal become direct current, and 1 filtering becomes level and smooth 300V dc signal through capacitor C, and resistance R 1, R2, R3 series connection back constitute the step-down branch road with capacitor C 1.The 300V dc signal boosts the back to FET Q1 power supply through transformer T2; The secondary winding of transformer T2 produces an induced electromotive force; After resistance R 4 step-downs, be sent to integrated chip L6562; The 15V rectification filtering power is given integrated chip L6562 power supply through diode D1, capacitor C 3, C4 parallel connection filtering.The 6 pin ground connection of integrated chip L6562, resistance R 9, R10, the R11 dividing potential drop of connecting is sent in the integrated chip L6562 and several roads, front compare computing, compensation from booster diode D3 sampling, reaches the purpose that improves power factor and suppress harmonic content.Capacitor C 6 is connected in parallel on the way circuit, is total filter capacitor.The high-frequency circuit that mainly constitutes that current rectifying and wave filtering circuit connects at the back by integrated chip IPM3256, FET Q2, Q3.The 15V rectification filtering power is given integrated chip IPM3256 power supply through diode D2; Give integrated chip IPM3256 after 300V power supply process resistance R 26, R13, the R12 current limliting; Capacitor C 7, C8, C9 are the parallelly connected filter branch of integrated chip IPM3256; Connect as the clamped branch road of integrated chip IPM3256 with capacitor C 10 after resistance R 14, the R15 parallel connection, capacitor C 11 constitutes the energy storage branch road.The 8 pin ground connection of integrated chip IPM3256,9 pin are the signal feedback end.After being coupled through capacitor C 19, transformer T3 secondary induction electromotive force a load information is provided for integrated chip IPM3256 through resistance R 22, the clamped back of C14 current limliting again.Connect the grid of FET Q2 after diode D4 and resistance R 17 parallel connections, its grid and the drain electrode between and connecting resistance R19.Connect the grid of FET Q3 after diode D5 and resistance R 18 parallel connections and give its current information.The source electrode of FET Q2 connects the 400V power supply, and the source electrode of its drain electrode and FET Q3 connects center line, and the main winding of process transformer T3 and capacitor C 17 are to fluorescent tube.Voltage stabilizing didoe DZ1 is a 15V voltage stabilizing branch road; High-frequency circuit is the required high frequency of load (38KHZ-45KHZ) ac signal through the dc signal that integrated chip L6562 internal arithmetic circuit will come together in inversion, through transformer T3 and capacitor C 16 resonance relief tube startings.The induced electromotive force one tunnel that two secondary winding of transformer T3 produce is through capacitor C 18, and preheat curent of filament is given after being coupled through capacitor C 19 in another road, gives feedback information of integrated chip IPM3256 simultaneously, detects the band pressure that load and prime are sent here; In addition, also realized starting slowly.Electric current occurs information directly being delivered to integrated chip IPM3256 when unusual, forces its inner crystal oscillator failure of oscillation, FET Q2, Q3 no-output, and load is not worked, protective circuit safety, after fault was eliminated, crystal oscillator can recover starting of oscillation voluntarily, and circuit is normal.
Claims (8)
1. an electric ballast comprises a power filter, the current rectifying and wave filtering circuit that is connected with active filter circuit, the high-frequency circuit that is connected with current rectifying and wave filtering circuit, the load circuit that is connected with high-frequency circuit; It is characterized in that: between current rectifying and wave filtering circuit and high-frequency circuit, connect a circuit of power factor correction; Between high-frequency circuit and load circuit, connect a negative-feedback circuit.
2. electric ballast according to claim 1 is characterized in that: the π type active filter circuit that described active filter circuit is made up of transformer T1, inductance L 2 and capacitor C X1, CX2, CX3, CY1, CY2; One end of inductance L 2 is connected with the winding of transformer T1; The other end is through capacitor C Y1 ground connection; Be connected in parallel on the two ends of capacitor C Y1 after capacitor C Y2, the CX3 series connection; Capacitor C X1 is connected in parallel on the two ends of power supply, and capacitor C X2 one end is connected between inductance L 2 and the transformer, and the other end is connected with the secondary winding of transformer T1; The common port of the common port of inductance L 2 and capacitor C Y1 and capacitor C Y2, CX3 is connected to current rectifying and wave filtering circuit.
3. electric ballast according to claim 1 is characterized in that: described current rectifying and wave filtering circuit comprises bridge heap module DB175S and capacitor C 1, and an end of capacitor C 1 is connected other end ground connection with bridge heap module DB175S.
4. electric ballast according to claim 1 is characterized in that: described circuit of power factor correction comprises integrated chip L6562, transformer T2, FET Q1, diode D1, D3, a plurality of electric capacity and a plurality of resistance; The electric capacity, the resistance that connect parallel connection between 1 pin of integrated chip L6562 and 2 pin; The step-down branch road that 3 pin are formed through a plurality of resistance is connected with current rectifying and wave filtering circuit, and 5 pin are connected with an end of transformer T2 secondary winding, the other end ground connection of this secondary winding; One end of its winding is connected with current rectifying and wave filtering circuit; The anode of other end diode D3 connects, and its negative electrode is through capacity earth, and 7 pin of integrated chip L6562 are connected with the grid of FET Q1; Its drain electrode is connected with 4 pin of integrated chip L6562 and through grounding through resistance, source electrode is connected with the anode of triode D3; 8 pin of integrated chip L6562 are connected with the negative electrode of diode D1, and its anode is connected with high-frequency circuit.
5. electric ballast according to claim 1 is characterized in that: described high-frequency circuit comprises integrated chip IPM3256, FET Q2, Q3; Capacitor C 7, C8, C9 are the parallelly connected filter branch of integrated chip IPM3256, connect as the clamped branch road of integrated chip IPM3256 with capacitor C 10 after resistance R 14, the R15 parallel connection, and capacitor C 11 constitutes the energy storage branch road; 10 pin connect the leakage of FET Q3; 11 pin connect the grid of FET Q3, and 12,14 pin connect the drain electrode of source electrode and the FET Q2 of FET Q3, and 13 pin connect the grid of FET Q2; The source electrode of FET Q2 connects the 400V power supply, and 2 pin and 3 pin connect power supply; 9 pin and 12 pin of integrated chip IPM3256 connect negative-feedback circuit.
6. electric ballast according to claim 1 is characterized in that: described negative-feedback circuit comprise have three-winding transformer T3 and capacitor C 17, C18, C19; Main winding one end of transformer T3 is connected with high-frequency circuit; The other end is connected with fluorescent tube through capacitor C 17, an end ground connection of an auxiliary winding, and the other end connects fluorescent tube through capacitor C 19; One termination fluorescent tube of secondary auxiliary winding, the other end connects fluorescent tube through capacitor C 18; The public termination high-frequency circuit of capacitor C 19 and fluorescent tube.
7. an electricity-saving lamp comprises shell, it is characterized in that: adopt each described electric ballast of claim 1～6.
8. a kind of electricity-saving lamp according to claim 7 is characterized in that: shell adopts high-strength nylon material PA66 to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110341345XA CN102510648A (en) | 2011-11-02 | 2011-11-02 | Electronic ballast and energy saving lamp adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110341345XA CN102510648A (en) | 2011-11-02 | 2011-11-02 | Electronic ballast and energy saving lamp adopting same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102510648A true CN102510648A (en) | 2012-06-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110341345XA Pending CN102510648A (en) | 2011-11-02 | 2011-11-02 | Electronic ballast and energy saving lamp adopting same |
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| Country | Link |
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| CN (1) | CN102510648A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109348604A (en) * | 2018-11-23 | 2019-02-15 | 肇庆三雄极光照明有限公司 | A kind of Metal halogen lamp ballast of constant-power control circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6034489A (en) * | 1997-12-04 | 2000-03-07 | Matsushita Electric Works R&D Laboratory, Inc. | Electronic ballast circuit |
| CN1694597A (en) * | 2005-05-20 | 2005-11-09 | 马士科技有限公司 | A fluorescent lamp ballast with graded dimming |
| CN201789672U (en) * | 2010-09-15 | 2011-04-06 | 珠海市珈玛灯具制造有限公司 | Electronic ballast |
| CN201830535U (en) * | 2010-09-17 | 2011-05-11 | 张家港市乐余金赛源照明电器厂 | Electronic ballast and energy-saving lamp |
| CN202262006U (en) * | 2011-11-02 | 2012-05-30 | 贺宝光 | Electronic ballast and energy-saving lamp adopting same |
-
2011
- 2011-11-02 CN CN201110341345XA patent/CN102510648A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6034489A (en) * | 1997-12-04 | 2000-03-07 | Matsushita Electric Works R&D Laboratory, Inc. | Electronic ballast circuit |
| CN1694597A (en) * | 2005-05-20 | 2005-11-09 | 马士科技有限公司 | A fluorescent lamp ballast with graded dimming |
| CN201789672U (en) * | 2010-09-15 | 2011-04-06 | 珠海市珈玛灯具制造有限公司 | Electronic ballast |
| CN201830535U (en) * | 2010-09-17 | 2011-05-11 | 张家港市乐余金赛源照明电器厂 | Electronic ballast and energy-saving lamp |
| CN202262006U (en) * | 2011-11-02 | 2012-05-30 | 贺宝光 | Electronic ballast and energy-saving lamp adopting same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109348604A (en) * | 2018-11-23 | 2019-02-15 | 肇庆三雄极光照明有限公司 | A kind of Metal halogen lamp ballast of constant-power control circuit |
| CN109348604B (en) * | 2018-11-23 | 2023-09-19 | 肇庆三雄极光照明有限公司 | Metal halide lamp ballast of constant power control circuit |
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Application publication date: 20120620 |