CN105764223A - High-efficiency full-bridge mode large-power HID electronic ballast - Google Patents
High-efficiency full-bridge mode large-power HID electronic ballast Download PDFInfo
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- CN105764223A CN105764223A CN201410786814.2A CN201410786814A CN105764223A CN 105764223 A CN105764223 A CN 105764223A CN 201410786814 A CN201410786814 A CN 201410786814A CN 105764223 A CN105764223 A CN 105764223A
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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 high-efficiency full-bridge mode large-power HID electronic ballast, and the electronic ballast comprises an EMC filter circuit 1, a rectification and active power factor correction circuit 2, a high-frequency full-bridge inversion circuit 3, a frequency sweep resonant point lighting circuit 4, an output filter circuit 5, a sampling circuit 6, an intelligent control circuit 7, a drive circuit 8, and an auxiliary power circuit 9. The rectification and active power factor correction circuit 2 employs a PFC control module with swing frequency as the core swing frequency control technology and multiple high-frequency absorption circuit. The high-frequency full-bridge inversion circuit 3 employs the technology of symmetric double-inductor design, and mainly consists of four MOS tubes M1-M4, four fly-wheel diodes D3-D6, four buffering capacitors C6-C9, two resonance capacitors C10 and C11, two high-frequency absorption capacitors C12 and C13, and two ballast inductors L3 and L4 with the equal number of winding turns. The intelligent control circuit 7 employs a control mode of digital-analog integration. The drive circuit 8 employs a reliable integrated driver.
Description
Technical field
The present invention relates to a kind of efficiently full-bridge mode high-power HID electric ballast, illuminate for supporting high-power HID.
Background technology
High-power HID electric ballast product be currently mainly on sale to America and Europe etc. developed country, product must flow through FCC certification could enter American market.The raising to EMC (EMC) standard in the recent period due to American market, the current domestic product without a company's batch production can reach its standard.The former batch of our company exports to the product digital-type high-power multifunctional HID electronic ballast (ZL2009202292422) of the U.S. and high frequency half bridge adds boosting output and dims HID electronic ballast (ZL2010205172942) with numerical control and also do not reach its new requirement.For this company since 2013 by multinomial research of technique, develop " the high-power HID electric ballast that a kind of Electro Magnetic Compatibility is excellent " (2014202838146), this product be domestic first in the U.S. by the product of FCCPart18ClassB standard testing, and be successfully realized volume production and export to North America market.
A kind of 1000W two-end high voltage sodium lamp DE series that nearly a few coming year, international lighting giant PHILIPS company carried out, progressively obtains the accreditation in market, and comes into vogue at American market.This kind of DE series 1000W high-pressure mercury lamp light efficiency is high, spectrum is particularly suitable for agricultural greenhouse plantation, but supporting electric ballast is required very high by it, need the optimum performance of supporting electric ballast output 100KHz operating frequency competence exertion bulb, if bulb operating frequency is lower than 100KHz, being easy to cause the acoustic resonance of bulb, bulb, by the lost of life, even damages.And general monofocal high-pressure mercury lamp suitable electronic ballast works in 30-60KHz and namely can avoid acoustic resonance.The difficult problem that the raising of operating frequency brings is metal-oxide-semiconductor, diode, and dv/dt, the di/dt of power inductance strengthens, and the process of electromagnetic compatibility is more difficult.
Due to the aggravation of the market competition, the decline of RMB exchange rate, it is higher to add 2014202838146 product costs having passed through FCC test, and the profit margin of product reduces, and enterprise production and management is very difficult.Company is Full Featured in the urgent need to one in this case, and versatility is good, single-ended HID lamp, both-end HID lamp can auxiliary work, operating frequency, at more than 100KHz, tests certification by FCC, cost performance compares again high product, increases competitiveness, extends volume growth.For these reasons, company development teams, main attack have developed " a kind of efficiently full-bridge mode high-power HID electric ballast ".
Summary of the invention
It is an object of the invention to adopt full-bridge circuit pattern to provide a kind of good product performance, EMC performance can pass through U.S.'s FCC certification, can work in the high frequency of 100KHz, and a versatility of HID lamp bubble is good with joining, the great-power electronic ballast that cost performance is high.
Technical scheme: the present invention is absorbing and on the basis of above-mentioned three patented technologies of optimization our company, optimize the filter circuit of prior art once again, improve high frequency absorption circuit, innovate full-bridge circuit topological structure, increase output filter circuit, thus realizing the conception of the present invention.
Circuit of the present invention includes: frequency sweep resonance point circuit for lamp 4, and input is connected with the outfan of high frequency full bridge inverter 3, adopts frequency sweep resonance lighting technology to complete the reliable driving of HID lamp bubble；Output filter circuit 5, input is connected with frequency sweep resonance point circuit for lamp 4, for filtering the EMI interference that high frequency full-bridge loop produces, relatively cleaner high-frequency alternating current is supplied to HID lamp, it is suppressed that radiation interference；Sample circuit 6, input is connected with frequency sweep resonance point circuit for lamp 4, is used for gathering resonance potential, HID lamp voltage, lamp current to intelligent control circuit 7；Accessory power supply 9, outfan and rectification and APFC 2 and intelligent control circuit 7 are connected, for providing the low-tension supply of chip operation, it is characterized in that: also include EMC filter circuit 1, input and city are electrically connected, for future civil power Radio frequency interference and electromagnetic interference filter, the internal conduction produced of damped electron ballast and radiation interference；Rectification and APFC 2, adopt wobble frequency technology and multiple high pressure absorption techniques, and its input is connected with EMC filter circuit 1, is used for producing galvanic current supply high frequency full bridge inverter 3；High frequency full bridge inverter 3, adopts symmetric double inductor design, and its input is connected with rectification and APFC 2, is used for generating high-frequency alternating current supply HID lamp bubble；Intelligent control circuit 7 and accessory power supply 9, sample circuit 6 and drive circuit 8 connect, it is achieved invariable power dims, and resonance potential is tested, the various control such as lamp tube life end, short circuit；Drive circuit 8, is connected with intelligent control circuit 7 and high frequency full bridge inverter 3, is used for driving high frequency full bridge inverter 3 to work.
Rectification of the present invention and APFC 2, adopt the wobble frequency technology that PFC control module is core with wobble frequency, it is achieved reduces Radio frequency interference and electromagnetic interference；Adopting inductance L2, diode D2, resistance R2, electric capacity C2, low capacity electric capacity C3, large bulk capacitance C4 to form multi-absorption loop, when metal-oxide-semiconductor Q1 turns off, C2 charges through D2, and when Q1 opens, the high frequency ripple electric charge that C2 absorbs returns to big electrochemical capacitor C5 through R2；L2 weakens the ripple current from PFC inductance L1 when PFC diode current flow；The C3 decay PFC of low capacity exports the High-frequency Interference voltage in unidirectional current, is released to ground；The Large Copacity Absorption Capacitance C4 PFC that releases exports the high-frequency harmonic composition in unidirectional current.
High frequency full bridge inverter 3 of the present invention, adopts symmetric double inductor design, and its input is connected with the outfan of rectification and APFC 2, outfan connects frequency sweep resonance point circuit for lamp 4, and in its circuit, M1-M4 is four metal-oxide-semiconductors of full bridge inverter, D3-D6 is four fly-wheel diodes, C6-C9 is four buffering electric capacity, C10, and C11 is resonant capacitance, C12, C13 is high frequency absorption electric capacity, and symmetric double inductance L3, L4 are two ballast inductance that inductance value is equal.
Driving signal when drive circuit 8 provides high frequency square wave, metal-oxide-semiconductor M1, M3 are simultaneously open-minded, and+400V source current returns to power supply bear through M1, L3, output filter circuit 5, HID lamp, L4, M3；Driving signal when drive circuit 8 provides another group high frequency square wave, metal-oxide-semiconductor M2, M4 are simultaneously open-minded, and+400V source current returns to power supply bear through M4, L4, output filter circuit 5, HID lamp, L3, M2；In the Dead Time that high-frequency drive square-wave signal alternately provides, diode D3-D6 realizes the afterflow in loop.
High frequency full bridge inverter works in the high frequency of 100KHz, and output is up to 1500W, can produce significantly high conduction and radiation interference.
In order to solve above-mentioned technical problem, the present invention adds electric capacity C6-C9 in high frequency full bridge inverter and is parallel to the DS pole of four metal-oxide-semiconductor M1-M4, provides buffering, reduce dv/dt in major loop when turning off for metal-oxide-semiconductor；Electric capacity C12, C13 one end is connected to brachium pontis midpoint, and one end is connected to ballast casing ground connection, and the high-frequency interferencing signal produced when full-bridge circuit is switched is released to ground；Output filter circuit 5 degrading radiation once again disturbs.
Compared with prior art, this circuit is owing to employing two ballast inductance (L3 of symmetry, L4 number of winding turns, inductance value are equal), when making ballast energising work, the lighting high pressure that frequency sweep resonance point circuit for lamp 4 produces is divided equally by two ballast inductance, and every inductance shares the resonance high-voltage of half, loop reliability improves, the voltage being supplied to lamp load during every a pair metal-oxide-semiconductor ON operation of full-bridge is symmetrical, and electric current is more clean, and radiation interference reduces.
The invention has the beneficial effects as follows: leading portion APFC circuit adopts multiple filter circuit, effectively filters out and isolates EMI noise produced by input ac power；Adopt wobble frequency PFC control model, effectively reduce the harmonic noise peak value of pfc circuit, by multi-absorption circuit, high frequency dv/dt, the di/dt that reduction pfc circuit metal-oxide-semiconductor, diode switch bring, obtain the unidirectional current of high-quality；Back segment adopts cost performance higher, and the symmetric double inductance full-bridge mode circuit of better reliability increases high frequency absorption and bleed-off circuit, reduces full-bridge metal-oxide-semiconductor, dv/dt, the di/dt of ballast inductance；Increase output high-frequency filter circuit, decay output radiation interference；Intelligent control part adopts the ripe control method of digital-to-analogue set, it is achieved the effective control to various states such as resonance high-voltage, invariable power, light modulation, lamp tube life end, short circuits.
Adopting the North America market main force product 1000W high-power HID electric ballast manufactured by the technology of the present invention, its EMC performance reaches domestically leading level, is tested the certification of authoritative institution NorthwestEMC in the near future by U.S. FCC.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of HID electronic ballast in the embodiment of the present invention.
Fig. 2 is EMC filter circuit and high frequency absorption circuit theory diagrams in the embodiment of the present invention.
Fig. 3 is embodiment of the present invention medium-high frequency full bridge inverter schematic diagram.
Detailed description of the invention
The invention mainly comprises EMC filter circuit 1, rectification and APFC 2, high frequency full bridge inverter 3, frequency sweep resonance point circuit for lamp 4, output filter circuit 5, sample circuit 6, intelligent control circuit 7, drive circuit 8 and auxiliary power circuit 9 as shown in Figure 1.
The input of EMC filter circuit 1 and city are electrically connected, for filtering from the Radio frequency interference in civil power and electromagnetic interference, and the internal conduction produced of damped electron ballast and radiation interference；The input of rectification and APFC 2 is connected with the outfan of EMC filter circuit 1, is used for producing galvanic current supply high frequency full bridge inverter 3；The input of high frequency full bridge inverter 3 is connected with the outfan of rectification and APFC 2, is used for generating high-frequency alternating current supply HID lamp bubble；The input of frequency sweep resonance point circuit for lamp 4 is connected with the outfan of high frequency full bridge inverter 3, adopts frequency sweep resonance lighting technology to complete the reliable driving of HID lamp bubble；The input of output filter circuit 5 is connected with frequency sweep resonance point circuit for lamp 4, for filtering the EMI interference that high frequency full-bridge loop produces, relatively cleaner high-frequency alternating current is supplied to HID lamp, it is suppressed that radiation interference；Sample circuit 6 input is connected with frequency sweep resonance point circuit for lamp 4, is used for gathering resonance potential, HID lamp voltage, lamp current to intelligent control circuit 7, to realize perfect defencive function；Intelligent control circuit 7 realizes invariable power, light modulation, the various controls such as resonance potential detects, lamp tube life end, short circuit；Drive circuit 8 outfan is connected with high frequency full bridge inverter 3, is used for driving high frequency full bridge inverter 3 to work；Accessory power supply 9 outfan and rectification and APFC 2 and intelligent control circuit 7 are connected, for providing the low-tension supply of various chip operation.
In the present embodiment, intelligent control circuit 7 adopts the control mode of digital-to-analogue set, namely the collection of dim signal is realized by simple analog circuit, the judgement of dim signal, dimming cycle setting by reliable technical grade chip microcontroller, the change of dimmed power is outputed signal to out by the single-chip microcomputer of technical grade, finally completed by reliable pwm chip frequency modulation control, it is achieved in high precision, the brightness adjustment control of high linearity.The frequency sweep starting point of frequency sweep resonant tank, frequency sweep cycle is also by reliable technical grade chip microcontroller, frequency sweep starting point, and frequency sweep cycle all can flexible.
The realized resonance potential detection of sample circuit 6, lamp tube life end, short-circuit detecting realizes by simple and reliable analog circuit, the signal collected protection giving reliable technical grade chip microcontroller ballast after treatment.
Drive circuit 8 adopts reliable integrated drive, it is provided that reliable and stable high frequency square wave drives signal.
As shown in Figure 2: rectification and in APFC 2 adopt and optimize the wobble frequency technology in house journal (2014202838146), improve high frequency absorption circuit.
L2, D2, R2, C2, C3, C4 form multi-absorption loop.When metal-oxide-semiconductor Q1 turns off, C2 charges through D2, it is provided that buffer loop, protects metal-oxide-semiconductor；When Q1 opens, the high frequency ripple electric charge that C2 absorbs returns to big electrolysis C5 through R2；Small inductor L2 weakens the ripple current from PFC inductance L1 when PFC diode current flow；The C3 decay PFC of low capacity exports the High-frequency Interference voltage in unidirectional current, is released to ground.The Large Copacity Absorption Capacitance C4 PFC that releases exports the high-frequency harmonic composition in unidirectional current.
High frequency full bridge inverter 3, M1-M4 is four metal-oxide-semiconductors of full bridge inverter as shown in Figure 3, and D3-D6 is four fly-wheel diodes, and C6-C9 is four buffering electric capacity, C10, C11 are resonant capacitances, C12, C13 is high frequency absorption electric capacity, L3, and L4 is two ballast inductance that inductance value is equal.
Drive circuit 8 provides high frequency square wave and drives signal, and metal-oxide-semiconductor M1, M3 are simultaneously open-minded, and+400V source current returns to power supply bear through M1, L3, output filter circuit 5, HID lamp, L4, M3；Drive circuit 8 provides another group high frequency square wave and drives signal, and metal-oxide-semiconductor M2, M4 are simultaneously open-minded, and+400V source current returns to power supply bear through M4, L2, output filter circuit 5, HID lamp, L1, M2.
In the Dead Time that full bridge inverter is fixing, during two groups of brachium pontis changes of current, diode D3-D6 realizes the afterflow in loop；Electric capacity C6-C9 is parallel to the DS pole of four metal-oxide-semiconductors, provides charging buffering, reduce dv/dt in major loop when turning off for metal-oxide-semiconductor；Electric capacity C12, C13 one end is connected to brachium pontis midpoint, and one end is connected to ballast casing ground connection, and the high-frequency interferencing signal produced when full-bridge circuit is switched is released to ground；Output filter circuit 5 degrading radiation once again disturbs.Owing to have employed double; two inductor design technology of symmetry, when making ballast energising work, the lighting high pressure that frequency sweep resonance point circuit for lamp produces is divided equally by two ballast inductance L3, L4, every inductance shares the resonance high-voltage of half, loop reliability improves, the voltage being supplied to lamp load during every a pair metal-oxide-semiconductor ON operation of full-bridge is symmetrical, and electric current is more clean, and radiation interference reduces.
Claims (6)
1. an efficient full-bridge mode high-power HID electric ballast, its circuit structure includes: frequency sweep resonance point circuit for lamp (4), input is connected with the outfan of high frequency full bridge inverter (3), adopts frequency sweep resonance lighting technology to complete the reliable driving of HID lamp bubble；Output filter circuit (5), input is connected with frequency sweep resonance point circuit for lamp (4), for filtering the EMI interference that high frequency full-bridge loop produces, relatively cleaner high-frequency alternating current is supplied to HID lamp, it is suppressed that radiation interference；Sample circuit (6), input is connected with frequency sweep resonance point circuit for lamp (4), is used for gathering resonance potential, HID lamp voltage, lamp current to intelligent control circuit (7)；Accessory power supply (9) outfan and rectification and APFC (2) and intelligent control circuit (7) are connected, for providing the low-tension supply of chip operation, it is characterized in that, also include EMC filter circuit (1), input and city are electrically connected, for Radio frequency interference and the electromagnetic interference from civil power is filtered, the internal conduction produced of damped electron ballast and radiation interference；Rectification and APFC (2), adopt wobble frequency technology and multiple high frequency absorption technology, and its input is connected with EMC filter circuit (1), is used for producing galvanic current supply high frequency full bridge inverter (3)；High frequency full bridge inverter (3), adopts symmetric double inductor design technology, and its input is connected with rectification and APFC (2), is used for generating high-frequency alternating current supply HID lamp bubble；Intelligent control circuit (7), is connected with accessory power supply (9), sample circuit (6) and drive circuit (8), it is achieved invariable power dims, and resonance potential is tested, the various control such as lamp tube life end, short circuit；Drive circuit (8), is connected with intelligent control circuit (7) and high frequency full bridge inverter (3), is used for driving high frequency full bridge inverter (3) to work.
2. the efficient full-bridge mode high-power HID electric ballast of one according to claim 1, it is characterized in that: rectification and APFC (2), adopt the wobble frequency technology that PFC control module is core with wobble frequency, it is achieved reduce Radio frequency interference and electromagnetic interference；Adopting inductance L2, diode D2, resistance R2, electric capacity C2, low capacity electric capacity C3, large bulk capacitance C4 to form multi-absorption loop, when metal-oxide-semiconductor Q1 turns off, C2 charges through D2, and when Q1 opens, the high frequency ripple electric charge that C2 absorbs returns to big electrochemical capacitor C5 through R2；L2 weakens the ripple current from PFC inductance L1 when PFC diode current flow；The C3 decay PFC of low capacity exports the High-frequency Interference voltage in unidirectional current, is released to ground；The jumbo Absorption Capacitance C4 PFC that releases exports the high-frequency harmonic composition in unidirectional current.
null3. the efficient full-bridge mode high-power HID electric ballast of one according to claim 1，It is characterized in that: rectification and high frequency full bridge inverter (3)，Adopt symmetric double inductor design，Its input is connected with the outfan of rectification and APFC (2)，Outfan connects frequency sweep resonance point circuit for lamp (4)，In its circuit，M1-M4 is four metal-oxide-semiconductors of full bridge inverter，D3-D6 is four fly-wheel diodes，C6-C9 is four buffering electric capacity，C10，C11 is resonant capacitance，C12，C13 is high frequency absorption electric capacity，Symmetric double inductance L3，L4 is two ballast inductance that inductance value is equal，Signal is driven when drive circuit (8) provides high frequency square wave，Metal-oxide-semiconductor M1，M3 is simultaneously open-minded，+ 400V source current is through M1、L3、Output filter circuit (5)、HID lamp、L4、M3 returns to power supply and bears；Driving signal when drive circuit (8) provides another group high frequency square wave, metal-oxide-semiconductor M2, M4 are simultaneously open-minded, and+400V source current returns to power supply bear through M4, L4, output filter circuit (5), HID lamp, L3, M2；In the Dead Time that high-frequency drive square-wave signal alternately provides, diode D3-D6 realizes the afterflow in loop.
4. the efficient full-bridge mode high-power HID electric ballast of one according to claim 1, it is characterized in that: inner four the buffering electric capacity C6-C9 increased of high frequency full bridge inverter (3) are parallel to the DS pole of four metal-oxide-semiconductor M1-M4, buffering is provided when turning off for metal-oxide-semiconductor, reduces dv/dt in major loop；High frequency absorption electric capacity C12, C13 one end is connected to brachium pontis midpoint, and one end is connected to ballast casing ground connection, and the high-frequency interferencing signal produced when full-bridge circuit is switched is released to ground.
5. the efficient full-bridge mode high-power HID electric ballast of one according to claim 1, it is characterized in that: intelligent control circuit (7) adopts the control model of digital-to-analogue set, the collection of dim signal is realized by simple analog circuit, the formulation of dim signal, the setting of dimming cycle is by technical grade chip microcontroller, the change of dimmed power is outputed signal to out by technical grade single-chip microcomputer, is finally completed by pwm chip frequency modulation control.
6. the efficient full-bridge mode high-power HID electric ballast of one according to claim 1, it is characterised in that: drive circuit (8) adopts integrated drive, it is provided that reliable and stable high frequency square wave drives signal.
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| CN201410786814.2A CN105764223A (en) | 2014-12-18 | 2014-12-18 | High-efficiency full-bridge mode large-power HID electronic ballast |
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| CN201410786814.2A CN105764223A (en) | 2014-12-18 | 2014-12-18 | High-efficiency full-bridge mode large-power HID electronic ballast |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102286A (en) * | 2016-08-30 | 2016-11-09 | 成都英格瑞德电气有限公司 | Constant-current dimmer based on EMC filtering soft start |
| CN106332418A (en) * | 2016-08-30 | 2017-01-11 | 成都英格瑞德电气有限公司 | Sinusoidal wave dimmer module based on PFC (Power Factor Correction) rectifier energy storage |
| CN106685238A (en) * | 2016-08-30 | 2017-05-17 | 成都英格瑞德电气有限公司 | Constant current device employing digital signal processor (DSP) control and driving |
| CN108419349A (en) * | 2018-02-07 | 2018-08-17 | 福建睿能科技股份有限公司 | Full-bridge high-frequency driving circuit, electric ballast and the lighting apparatus of low EMI |
| CN109297633A (en) * | 2018-09-29 | 2019-02-01 | 宁波中车时代传感技术有限公司 | Pressure transmitter is used in a kind of monitoring of Cooling Water of Diesel Locomotive system pressure |
| CN109548237A (en) * | 2018-12-07 | 2019-03-29 | 湖北集润科技有限公司 | A kind of integrated distribution formula LED comprehensive power system |
| CN110582153A (en) * | 2019-08-01 | 2019-12-17 | 福建睿能科技股份有限公司 | Driving circuit, driving method thereof and electronic ballast |
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2014
- 2014-12-18 CN CN201410786814.2A patent/CN105764223A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102286A (en) * | 2016-08-30 | 2016-11-09 | 成都英格瑞德电气有限公司 | Constant-current dimmer based on EMC filtering soft start |
| CN106332418A (en) * | 2016-08-30 | 2017-01-11 | 成都英格瑞德电气有限公司 | Sinusoidal wave dimmer module based on PFC (Power Factor Correction) rectifier energy storage |
| CN106685238A (en) * | 2016-08-30 | 2017-05-17 | 成都英格瑞德电气有限公司 | Constant current device employing digital signal processor (DSP) control and driving |
| CN108419349A (en) * | 2018-02-07 | 2018-08-17 | 福建睿能科技股份有限公司 | Full-bridge high-frequency driving circuit, electric ballast and the lighting apparatus of low EMI |
| CN109297633A (en) * | 2018-09-29 | 2019-02-01 | 宁波中车时代传感技术有限公司 | Pressure transmitter is used in a kind of monitoring of Cooling Water of Diesel Locomotive system pressure |
| CN109548237A (en) * | 2018-12-07 | 2019-03-29 | 湖北集润科技有限公司 | A kind of integrated distribution formula LED comprehensive power system |
| CN109548237B (en) * | 2018-12-07 | 2024-03-12 | 湖北集润科技有限公司 | Centralized and distributed LED integrated power supply system |
| CN110582153A (en) * | 2019-08-01 | 2019-12-17 | 福建睿能科技股份有限公司 | Driving circuit, driving method thereof and electronic ballast |
| CN110582153B (en) * | 2019-08-01 | 2022-04-01 | 福建睿能科技股份有限公司 | Driving circuit, driving method thereof and electronic ballast |
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