CN106658928B - LED light source driving control circuit for electronic ballast input - Google Patents
LED light source driving control circuit for electronic ballast input Download PDFInfo
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- CN106658928B CN106658928B CN201710007025.8A CN201710007025A CN106658928B CN 106658928 B CN106658928 B CN 106658928B CN 201710007025 A CN201710007025 A CN 201710007025A CN 106658928 B CN106658928 B CN 106658928B
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- 238000001914 filtration Methods 0.000 claims abstract description 85
- 238000001514 detection method Methods 0.000 claims abstract description 48
- 238000002955 isolation Methods 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 31
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
Classifications
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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
- H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
-
- 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
- H05B41/36—Controlling
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides an LED light source driving control circuit for electronic ballast input, which is characterized in that an output end of an electronic ballast is provided with a filament unit of an analog fluorescent lamp so that a loop is formed inside the electronic ballast, and an electronic ballast detection unit and a rectifying and filtering unit are arranged to form a working loop of an LED load so as to further control the LED load to be in a straight-through state all the time, and meanwhile, a relay is used for isolation, so that leakage current in each authentication standard is met. Compared with the LED light source driving control device which only adopts Buck and Buck boost topology, a manufacturer can realize the LED light source driving control device by adopting conventional components, and compared with the LED light source driving control device which can be compatible with the input of a commercial power and an electronic ballast, the adopted conventional components are fewer, and the LED light source driving control device can be applied to the engineering which only uses the electronic ballast to control the input, thereby greatly reducing the production cost, enhancing the market competitiveness and improving the economic benefit.
Description
Technical Field
The invention relates to the technical field of LED light source driving, in particular to an LED light source driving control circuit for electronic ballast input.
Background
An electronic ballast (Electronic ballast), which is one type of electronic ballast, is an electronic device that uses electronic technology to drive an electronic light source to produce the desired illumination. Corresponding to this is an inductive electronic ballast. Modern fluorescent lamps increasingly use electronic ballasts, which are portable and compact, even can be integrated with a lamp tube and the like, and meanwhile, the electronic ballasts can generally have the function of a starter, so that a separate starter can be omitted.
The LED in the current market adopts an electronic ballast or an inductive electronic ballast to drive an LED light source, the LED light source driving control technology adopts Buck and Buck boost topologies, and at the moment of the LED connection, the power voltage stress is directly applied to a switching tube and a surge absorption circuit, so that components are easy to damage. In order to increase the usability of the LED, manufacturers need to use high voltage-resistant components, which inevitably leads to increased production cost, reduced market competitiveness and reduced economic benefit. At present, although the problem of power supply voltage stress can be solved in the patent application of 'an LED light source driving control device compatible with mains supply and electronic ballast input', the circuit is complex and troublesome in lap joint because of the compatibility with the mains supply, the adopted electronic components are more, the total circuit cost is higher, and in certain cases, the device is adopted for higher cost under a large number of engineering applications only receiving the mains supply or the electronic ballast.
Disclosure of Invention
The invention provides an LED light source driving control circuit for electronic ballast input, which solves the technical problems that an analog filament circuit is arranged at the output end of an electronic ballast to form a loop inside the electronic ballast, and an electronic ballast detection unit and a rectifying and filtering unit are arranged to control an LED load to be in a straight-through state all the time.
In order to solve the technical problems, the invention provides an LED light source driving control circuit for electronic ballast input, which is provided with a rectifying and filtering unit, an LED load and an electronic ballast detection unit, wherein the rectifying and filtering unit and the electronic ballast detection unit are connected with the electronic ballast, the electronic ballast is provided with a first voltage output end, a second voltage output end, a third voltage output end, a fourth voltage output end, a live wire input end connected with mains supply and a zero line input end, the LED light source driving control circuit is also provided with a first analog fluorescent lamp filament unit and a second analog fluorescent lamp filament unit, the first analog fluorescent lamp filament unit is connected with the first voltage output end and the second voltage output end of the electronic ballast through the first analog filament input end and the second analog filament input end, and the second analog fluorescent lamp filament unit is connected with the fourth voltage output end of the electronic ballast through the third analog filament input end;
The first analog filament output end of the first analog fluorescent lamp filament unit is connected with the rectification filtering input end of the rectification filtering unit, the second analog filament output end of the second analog fluorescent lamp filament unit is connected with the first detection current input end of the electronic ballast detection unit, the second detection current input end of the electronic ballast detection unit is connected with the third voltage output end of the electronic ballast, and the detection current output end of the electronic ballast detection unit is connected with the ballast rectification filtering control input end of the rectification filtering unit;
The LED load is connected in series in the forward direction between the positive electrode output end and the negative electrode output end of the rectifying and filtering unit to form a loop.
Specifically, the second analog fluorescent lamp filament unit comprises a first capacitor and a first resistor; the first capacitor and the first resistor are connected in parallel between the fourth voltage output end of the electronic ballast and the first detection current input end of the electronic ballast detection unit.
Specifically, the electronic ballast detection unit is provided with a boosting sub-circuit, a ballast rectifying and filtering control sub-circuit and a relay isolation sub-circuit; the first boosting input end of the boosting sub-circuit, namely the first detection current input end of the electronic ballast detection unit is connected with the second analog filament output end of the second analog fluorescent lamp filament unit, and the second boosting input end of the boosting sub-circuit is the second detection current input end of the electronic ballast detection unit;
The third boosting input end of the boosting sub-circuit is connected with the first rectifying and filtering control input end of the ballast rectifying and filtering control sub-circuit, the first boosting output end and the second boosting output end of the boosting sub-circuit are connected with the second rectifying and filtering control input end and the third rectifying and filtering control input end of the ballast rectifying and filtering control sub-circuit, the first rectifying and filtering control output end and the second rectifying and filtering control output end of the ballast rectifying and filtering control sub-circuit are respectively connected with the source electrode and the grid electrode of the MOS tube of the relay isolation sub-circuit, the drain electrode of the MOS tube is connected with the first control end of the relay isolation sub-circuit, the second control end of the relay is connected with the third rectifying and filtering control output end of the ballast rectifying and filtering control sub-circuit, and the first controlled end and the second controlled end of the relay are respectively connected with the fourth rectifying and filtering control output end of the ballast rectifying and filtering control sub-circuit and the fourth rectifying and filtering control input end of the relay.
Preferably, the relay is a KA relay.
Alternatively, the relay is replaced with a mechanical switch or capacitor as an electrical isolation device.
Specifically, the first analog fluorescent lamp filament unit comprises a second capacitor and a second resistor; the second capacitor and the second resistor are connected in parallel between the first voltage output end and the second voltage output end of the electronic ballast.
Further, the rectifying and filtering unit is provided with a rectifying bridge sub-circuit and a third capacitor; the rectifier bridge sub-circuit is provided with a first diode, a second diode, a third diode and a fourth diode, the positive electrode ends of the first diode and the third diode are respectively a rectifier filtering input end and a ballast rectifier filtering control input end of the rectifier filtering unit, the negative electrode ends of the first diode and the third diode are connected with the positive electrode end of the third capacitor, the negative electrode end of the third capacitor is connected with the positive electrode ends of the second diode and the fourth diode, and the negative electrode ends of the second diode and the fourth diode are respectively connected with the positive electrode ends of the first diode and the third diode; the positive terminal and the negative terminal of the third capacitor are the rectifying and filtering positive output terminal and the negative output terminal.
In particular, the LED load comprises at least one LED.
The LED light source driving control circuit for electronic ballast input is provided by the invention, the filament unit of the simulated fluorescent lamp is arranged at the output end of the electronic ballast, so that a loop is formed inside the electronic ballast, and the electronic ballast detection unit and the rectifying and filtering unit are arranged to form a working loop of an LED load so as to further control the LED load to be in a straight-through state all the time, and meanwhile, the LED load is isolated by a relay, so that the leakage current in each authentication standard is met. Compared with the LED light source driving control device which only adopts Buck and Buck boost topology, a manufacturer can realize the LED light source driving control device by adopting conventional components, and compared with the LED light source driving control device which can be compatible with the input of a commercial power and an electronic ballast, the adopted conventional components are fewer, and the LED light source driving control device can be applied to the engineering which only uses the electronic ballast to control the input, thereby greatly reducing the production cost, enhancing the market competitiveness and improving the economic benefit.
Drawings
Fig. 1 is a circuit block diagram of an LED light source drive control circuit for electronic ballast input provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of a specific circuit of an LED light source drive control circuit for electronic ballast input according to an embodiment of the present invention;
fig. 3 is an electronic ballast input connection diagram of an LED light source driving control circuit for electronic ballast input according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which are for reference and illustration only, and are not intended to limit the scope of the invention.
Referring to fig. 1, a circuit block diagram of an LED light source driving control circuit for electronic ballast input is provided in an embodiment of the present invention. In this embodiment, the LED light source driving control circuit for electronic ballast input is provided with a rectifying and filtering unit 10, an LED load 20 and an electronic ballast detection unit 30, wherein the rectifying and filtering unit 10 and the electronic ballast detection unit 30 are connected with an electronic ballast EB, the electronic ballast EB is provided with a first voltage output end eb_pin1, a second voltage output end eb_pin2, a third voltage output end eb_pin3, a fourth voltage output end eb_pin4, a live wire input end eb_ac L and a zero line input end eb_ac N connected with a commercial power, the LED light source driving control circuit is also provided with a first analog fluorescent lamp filament unit 40 and a second analog fluorescent lamp filament unit 50, the first analog fluorescent lamp filament unit 40 is connected with the first voltage output end eb_pin1 and the second voltage output end eb_pin2 of the electronic ballast EB through a first analog filament input end 401 and a second analog filament input end 402, and the second analog fluorescent lamp filament unit 50 is connected with the fourth voltage output end eb_pin4 of the electronic ballast EB through a third analog input end 501;
The first analog filament output end 403 of the first analog fluorescent lamp filament unit 40 is connected with the rectifying and filtering input end 101 of the rectifying and filtering unit 10, the second analog filament output end 502 of the second analog fluorescent lamp filament unit 50 is connected with the first detection current input end 301 of the electronic ballast detection unit 30, the second detection current input end 302 of the electronic ballast detection unit 30 is connected with the third voltage output end eb_pin3 of the electronic ballast EB, and the detection current output end 303 of the electronic ballast detection unit 30 is connected with the ballast rectifying and filtering control input end 102 of the rectifying and filtering unit 10;
The LED load 20 is connected in series in the forward direction between the positive output terminal 103 and the negative output terminal 104 of the rectifying and filtering unit 10, so as to form a loop.
Fig. 2 is a schematic diagram of a specific circuit of an LED light source driving control circuit for electronic ballast input according to an embodiment of the present invention. In the present embodiment, the second analog fluorescent lamp filament unit 50 includes a first capacitor C1 and a first resistor R1; the first capacitor C1 and the first resistor R1 are connected in parallel between the fourth voltage output terminal eb_pin4 of the electronic ballast EB and the first detection current input terminal 301 of the electronic ballast EB detection unit 30.
The electronic ballast EB detection unit 30 is provided with a boosting sub-circuit 31, an electronic ballast EB rectifying and filtering control sub-circuit 32 and a relay isolation sub-circuit 33; the boost sub-circuit 31 is provided with a high-frequency booster T1, a first boost input end t1_pin1 of the high-frequency booster T1, that is, a first detection current input end 301 of the electronic ballast EB detection unit 30 is connected to a second analog filament output end 502 of the second analog fluorescent lamp filament unit 50, and a second boost input end t1_pin4 of the high-frequency booster T1 is a second detection current input end 302 of the electronic ballast EB detection unit 30;
The third boost input terminal t1_pin2 of the boost sub-circuit 31 is connected to the first rectifying and filtering control input terminal 321 of the ballast rectifying and filtering control sub-circuit 32, the first boost output terminal t1_pin3 and the second boost output terminal t1_pin7 of the boost sub-circuit 31 are connected to the second rectifying and filtering control input terminal 322 and the third rectifying and filtering control input terminal 323 of the ballast rectifying and filtering control sub-circuit 32, the first rectifying and filtering control output terminal 324 and the second rectifying and filtering control output terminal 325 of the ballast rectifying and filtering control sub-circuit 32 are respectively connected to the source electrode S and the gate electrode G of the MOS transistor Q1 of the relay isolation sub-circuit 33, the drain electrode D of the MOS transistor Q1 is connected to the first control terminal kb_pin1 of the relay KB of the relay isolation sub-circuit 33, the second control terminal kb_pin1 of the relay isolation sub-circuit 33 is connected to the third rectifying and filtering control output terminal 326 of the ballast rectifying and filtering control sub-circuit 32, and the first controlled terminal kb_pin3 and the second controlled terminal 327 of the relay isolation sub-circuit 33 are respectively connected to the rectifying and filtering control output terminal 10 of the ballast rectifying and filtering control sub-circuit 102.
The relay KB is a KA relay.
The relay KB is replaced by a mechanical switch or a capacitor, and is used as an electrical isolation device.
The first analog fluorescent lamp filament unit 40 includes a second capacitor C2 and a second resistor R2; the second capacitor C2 and the second resistor R2 are connected in parallel between the first voltage output terminal eb_pin1 and the second voltage output terminal eb_pin2 of the electronic ballast EB.
The rectifying and filtering unit 10 is provided with a rectifying bridge sub-circuit 11 and a third capacitor C3; the rectifier bridge sub-circuit 11 is provided with a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, positive terminals of the first diode D1 and the third diode D3 are respectively a rectifier filtering input terminal 101 and a ballast rectifier filtering control input terminal 102 of the rectifier filtering unit 10, negative terminals of the first diode D1 and the third diode D3 are connected with a positive terminal of the third capacitor C3, negative terminals of the third capacitor C3 are connected with positive terminals of the second diode D2 and the fourth diode D4, and negative terminals of the second diode D2 and the fourth diode D4 are respectively connected with positive terminals of the first diode D1 and the third diode D3; the positive and negative terminals of the third capacitor C3 are the rectifying and filtering positive output terminal 103 and the negative output terminal 104 of the rectifying and filtering unit 10.
The LED load 20 includes at least one LED.
In this embodiment, an electronic ballast input connection diagram of an LED light source driving control circuit for electronic ballast input is described above, and please refer to fig. 3. After the electronic ballast EB is connected to the mains supply, a corresponding current signal is output to the first analog fluorescent lamp filament unit 40 and the second analog fluorescent lamp filament unit 50, because in fig. 2, the first analog fluorescent lamp filament unit 40 and the second analog fluorescent lamp filament unit 50 have the ac blocking function of the second capacitor C2 and the first capacitor C1, and return current to the electronic ballast EB, so that the output current of the electronic ballast EB is formed, firstly, the output current of the electronic ballast EB is output to the first analog fluorescent lamp filament unit 40, and then, the output current of the electronic ballast EB, the LED load 20 and the second analog fluorescent lamp filament unit 50, and the output current of the electronic ballast EB, which are returned to the electronic ballast EB, form a complete loop.
In this embodiment, when the ballast rectifying and filtering control sub-circuit 32 detects the high-frequency signal of the electronic ballast EB, it controls the MOS Q1 and the LED load 20 to be in a straight-through state all the time so as to protect the circuit, and at the same time, the KA-relay KB is used for isolation, so as to meet the leakage current in each authentication standard.
In this embodiment, the current of the first analog filament output end 403 of the first analog fluorescent lamp filament unit 40 is rectified and filtered by the rectifying and filtering unit 10, and the voltage of the second analog filament output end 502 of the second analog fluorescent lamp filament unit 50 is boosted by the boost sub-circuit 31, and then the current is rectified and filtered by the ballast rectifying and filtering control sub-circuit 32, and then is controlled to be absorbed by the relay KB of the relay isolation sub-circuit 33, and then the current is output to the positive end and the negative end of the LED load 20 through the action of the third capacitor C3 (electrolytic capacitor) of the rectifying and filtering unit 10, so as to form an LED working loop. The rectified voltage is directly clamped by the LED load 20, and the electronic rectifier EB is a constant current source and is constant current flowing through the LED load 20, so that the normal operation of the LED load 20 is ensured.
The architecture is suitable for load control modes of RAPID START and Programmed RAPID START electronic ballasting output, and is directly compatible without changing a circuit when a live wire input end EB_AC L and a zero line input end EB_AC N are connected with electronic ballasts such as quick start (RAPIDSTART), programmable quick start (Programmed RAPID START) and the like.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (6)
1. An LED light source drive control circuit for electronic ballast input is provided with a rectifying and filtering unit, an LED load and an electronic ballast detection unit, wherein the rectifying and filtering unit and the electronic ballast detection unit are connected with the electronic ballast, and the electronic ballast is provided with a first voltage output end, a second voltage output end, a third voltage output end, a fourth voltage output end, a live wire input end and a zero line input end which are connected with mains supply, and is characterized in that: the electronic ballast is also provided with a first simulated fluorescent lamp filament unit and a second simulated fluorescent lamp filament unit, wherein the first simulated fluorescent lamp filament unit is connected with a first voltage output end and a second voltage output end of the electronic ballast through a first simulated filament input end and a second simulated filament input end, and the second simulated fluorescent lamp filament unit is connected with a fourth voltage output end of the electronic ballast through a third simulated filament input end;
The first analog filament output end of the first analog fluorescent lamp filament unit is connected with the rectification filtering input end of the rectification filtering unit, the second analog filament output end of the second analog fluorescent lamp filament unit is connected with the first detection current input end of the electronic ballast detection unit, the second detection current input end of the electronic ballast detection unit is connected with the third voltage output end of the electronic ballast, and the detection current output end of the electronic ballast detection unit is connected with the ballast rectification filtering control input end of the rectification filtering unit;
the LED load is connected in series in the forward direction between the positive electrode output end and the negative electrode output end of the rectifying and filtering unit to form a loop;
wherein the second analog fluorescent lamp filament unit comprises a first capacitor and a first resistor; the first capacitor and the first resistor are connected in parallel between the fourth voltage output end of the electronic ballast and the first detection current input end of the electronic ballast detection unit;
the LED load comprises at least one LED.
2. An LED light source drive control circuit for electronic ballast input as set forth in claim 1, wherein: the electronic ballast detection unit is provided with a boosting sub-circuit, a ballast rectifying and filtering control sub-circuit and a relay isolation sub-circuit; the first boosting input end of the boosting sub-circuit, namely the first detection current input end of the electronic ballast detection unit is connected with the second analog filament output end of the second analog fluorescent lamp filament unit, and the second boosting input end of the boosting sub-circuit is the second detection current input end of the electronic ballast detection unit;
A third boost input end of the boost sub-circuit is connected with the rectifier and filter control sub-circuit of the ballast
The first rectifying and filtering control input end, the first boosting output end and the second boosting output end of the boosting sub-circuit are connected with the second rectifying and filtering control input end and the third rectifying and filtering control input end of the ballast rectifying and filtering control sub-circuit, the first rectifying and filtering control output end and the second rectifying and filtering control output end of the ballast rectifying and filtering control sub-circuit are respectively connected with the source electrode and the grid electrode of the MOS tube of the relay isolation sub-circuit, the drain electrode of the MOS tube is connected with the first control end of the relay isolation sub-circuit, the second control end of the relay isolation sub-circuit is connected with the third rectifying and filtering control output end of the ballast rectifying and filtering control sub-circuit, and the first controlled end and the second controlled end of the relay are respectively connected with the fourth rectifying and filtering control output end of the ballast rectifying and filtering control sub-circuit and the ballast rectifying and filtering control input end of the rectifying and filtering unit.
3. An LED light source drive control circuit for electronic ballast input according to claim 2, wherein: the relay is a KA relay.
4. An LED light source drive control circuit for electronic ballast input according to claim 2, wherein: the relay is replaced by a mechanical switch or a capacitor as an electrical isolation device.
5. An LED light source drive control circuit for electronic ballast input as set forth in claim 1, wherein: the first analog fluorescent lamp filament unit comprises a second capacitor and a second resistor; the second capacitor and the second resistor are connected in parallel between the first voltage output end and the second voltage output end of the electronic ballast.
6. An LED light source drive control circuit for electronic ballast input as set forth in claim 1, wherein: the rectifying and filtering unit is provided with a rectifying bridge sub-circuit and a third capacitor; the rectifier bridge sub-circuit is provided with a first diode, a second diode, a third diode and a fourth diode, the positive electrode ends of the first diode and the third diode are respectively a rectifier filtering input end and a ballast rectifier filtering control input end of the rectifier filtering unit, the negative electrode ends of the first diode and the third diode are connected with the positive electrode end of the third capacitor, the negative electrode end of the third capacitor is connected with the positive electrode ends of the second diode and the fourth diode, and the negative electrode ends of the second diode and the fourth diode are respectively connected with the positive electrode ends of the first diode and the third diode; the positive terminal and the negative terminal of the third capacitor are the rectifying and filtering positive output terminal and the negative output terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710007025.8A CN106658928B (en) | 2017-01-05 | 2017-01-05 | LED light source driving control circuit for electronic ballast input |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710007025.8A CN106658928B (en) | 2017-01-05 | 2017-01-05 | LED light source driving control circuit for electronic ballast input |
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| CN106658928B true CN106658928B (en) | 2024-10-01 |
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| CN114080073A (en) * | 2020-08-17 | 2022-02-22 | 肯舒摩照明（美国）有限责任公司 | Lighting device and driving method thereof |
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| CN202721866U (en) * | 2012-06-15 | 2013-02-06 | 深圳市宝瑞恒业科技有限公司 | New type driving circuit which is compatible with LED lamp tube |
| CN206498577U (en) * | 2017-01-05 | 2017-09-15 | 惠州市时宇虹光电科技有限公司 | A kind of LED/light source drive control circuit inputted for electric ballast |
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| CN201114925Y (en) * | 2007-05-25 | 2008-09-10 | 宏景电子(芜湖)有限公司 | Electronic ballast for external electrode fluorescent lamp |
| CN102364815A (en) * | 2011-10-25 | 2012-02-29 | 杭州电子科技大学 | Intelligent sustainable power system based on complementary light, storage and mains power |
| TWI523580B (en) * | 2013-02-22 | 2016-02-21 | Compatible with LED ballast with electronic ballast with preheat current | |
| US20160205738A1 (en) * | 2015-01-08 | 2016-07-14 | Asiatree Technology Co., Ltd. | Led tube adapted for use with electronic ballast or ac mains and controlling method thereof |
| CN204795749U (en) * | 2015-07-03 | 2015-11-18 | 佛山电器照明股份有限公司 | LED drive circuit of compatible sub - ballast of high frequency electric and low frequency input |
| CN105704867B (en) * | 2016-04-26 | 2018-01-12 | 杰华特微电子（杭州）有限公司 | Voltage control circuit, LED drive circuit and its control method |
| CN105813274B (en) * | 2016-05-17 | 2018-05-15 | 深圳市宝瑞恒业科技有限公司 | A kind of power driving circuit and LED lamp tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202721866U (en) * | 2012-06-15 | 2013-02-06 | 深圳市宝瑞恒业科技有限公司 | New type driving circuit which is compatible with LED lamp tube |
| CN206498577U (en) * | 2017-01-05 | 2017-09-15 | 惠州市时宇虹光电科技有限公司 | A kind of LED/light source drive control circuit inputted for electric ballast |
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