CN206212329U - A kind of LED drive circuit - Google Patents
A kind of LED drive circuit Download PDFInfo
- Publication number
- CN206212329U CN206212329U CN201590000102.1U CN201590000102U CN206212329U CN 206212329 U CN206212329 U CN 206212329U CN 201590000102 U CN201590000102 U CN 201590000102U CN 206212329 U CN206212329 U CN 206212329U
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- China
- Prior art keywords
- power supply
- output
- led
- modules
- resistance
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- Expired - Fee Related
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
A kind of LED drive circuit, can drive multiple LEDs (10), and circuit includes power converting loop (11), AC DC modules (12), power supply IC modules (13) and multiple detections control module (14).Power converting loop (11) incoming transport power supply, adjusts alternating current size；AC DC modules (12) by AC power for being converted into direct current；Detection control module 14 is used to detect whether LED (10) accesses, and testing result is fed back into power supply IC modules (13)；Power supply IC modules (13) to power converting loop (11) according to testing result for providing adjustable control signal, so that the input current size of the ac input end of power converting loop (11) regulation AC DC modules (12).1 driving power supply band multiple LED is realized, power adaptive is realized, cost is saved.
Description
Technical field
The application is related to LED actuation techniques, more particularly to a kind of LED drive circuit.
Background technology
LED daylight lamp disc carrier, generally matches somebody with somebody at least one LED, and conventional drive method is every 1 lamp with 1 driving.When
When 1 lamp does not work, other light fixtures do as usual work, and this driving method is relatively costly.
Utility model content
The application purpose is to provide a kind of LED drive circuit, it is intended to which the light fixture of current many LEDs drives many, high cost
Problem.
A kind of LED drive circuit, can drive multiple LEDs, including incoming transport and for adjusting alternating current size
Power converting loop and the AC-DC module for turning direct current for exchanging, also including for providing controllable to the power converting loop
The power supply IC modules and multiple of signal processed are for detecting the detection the control module whether LED accesses；
Wherein, the ac input end of the AC-DC module connects the output end of the power converting loop, the AC-DC moulds
The direct current output of block terminates the positive pole of each LED；The input termination of each detection control module is corresponding described
The negative pole of LED, the feedback end of the output termination power supply IC modules；The output of the power supply IC modules terminates the power and turns
Gain the controlled end on road；The power supply IC modules 13 detect that the access state of the LED is adjusted according to the detection control module
The size of the control signal of the power converting loop is arrived in section output, so that the power converting loop adjusts the AC-DC moulds
The input current size of the ac input end of block.
Preferably, it is described detection control module include first switch pipe, second switch pipe, photoelectrical coupler, first resistor,
Second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance, wherein：
The control end of the first switch pipe connects the negative pole of the LED, the first switch by the first resistor
The output head grounding of pipe, and by the negative pole of LED described in the second resistance, the input termination of the first switch pipe is described
The output end of the light emitting source of photoelectrical coupler, the input of the light emitting source of the photoelectrical coupler was connected the 3rd resistor and was connect
The DC output end of the AC-DC module；
The output head grounding of the light-receiving device of the photoelectrical coupler, the input termination institute of the light-receiving device of the photoelectrical coupler
The control end of second switch pipe is stated, working power is also connect by the 4th resistance, the output head grounding of the second switch pipe,
One end of input termination the 5th resistance of the second switch pipe, the second end of the 5th resistance is controlled as the detection
The output end of molding block.
Preferably, the first switch pipe and second switch pipe are NPN type triode, and the first switch pipe and second is opened
The input of pass pipe, output end, control end are respectively colelctor electrode, emitter stage, the base stage of NPN type triode.
Preferably, the power supply IC modules include driving power supply chip, the 6th resistance and the 7th resistance, the driving power supply
The power pins of chip connect working power, the feedback pin of the driving power supply chip as the power supply IC modules feedback end
Connect the output end of the detection control module, the output pin of the driving power supply chip as the power supply IC modules output
Terminate the controlled end of the power converting loop；One termination working power of the 6th resistance, another termination detection control
The output end of molding block, and by the 7th resistance eutral grounding.
Preferably, the AC-DC module includes transformer, rectifier and filter capacitor, the primary coil of the transformer
Output end with the power converting loop is connected, and described rectifier one end connects with one end of the secondary coil of the transformer
Connect, the other end ground connection of the secondary coil of the transformer, the rectifier other end is grounded by the filter capacitor, and is made
It is the DC output end of the AC-DC module.
Preferably, the rectifier is commutation diode, and the anode of the commutation diode connects the secondary wire of the transformer
One end of circle, negative electrode connects the filter capacitor.
Above-mentioned LED drive circuit has detected whether that LED is accessed by using detection control module, and detection signal is defeated
Enter to power supply IC modules, power supply IC modules adjust the dutycycle of its control signal so that power converting loop is adjusted according to detection signal
The input current size of the ac input end of AC-DC module is saved, that is, realizes the power supply regulation of LED, realize that 1 drives electricity
Source band multiple LED, realizes power adaptive, saves cost.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of LED drive circuit in the application preferred embodiment.
Specific embodiment
In order that the application technical problem, technical scheme and beneficial effect to be solved becomes more apparent, below in conjunction with
Drawings and Examples, are further elaborated to the application.It should be appreciated that specific embodiment described herein is only used
To explain the application, it is not used to limit the application.
Fig. 1 is referred to, the LED drive circuit in the application preferred embodiment can drive multiple LEDs 10, including power to turn
Gain road 11, AC-DC module 12, power supply IC modules 13 and multiple detection control modules 14.
The incoming transport power supply (not shown) of power converting loop 11, and for adjusting alternating current size；AC-DC module 12
LED 10 is supplied electricity to for AC power to be converted into direct current to power；Detection control module 14 is used to detect whether LED 10 connects
Enter, and testing result is fed back into power supply IC modules 13；Power supply IC modules 13 are used for according to testing result to power converting loop
11 provide adjustable control signal.
The ac input end of AC-DC module 12 connects the output end of power converting loop 11, the direct current output of AC-DC module 12
End LED+ connects the positive pole of each LED 10；The negative pole of the input corresponding LED 10 of termination of each detection control module 14, often
The feedback end of the output termination power IC modules 13 of individual detection control module 14；The output termination power conversion of power supply IC modules 13
The control end in loop 11；Power supply IC modules 13 are arrived according to the access state regulation output of the detection detection LED 10 of control module 14
The size of the control signal of power converting loop 11, so that power converting loop 11 adjusts the ac input end of AC-DC module 12
Input current size.Power supply IC modules 13 adjust the size of control signal, work(according to the testing result of detection control module 14
Rate conversing circuits 11 adjust the input current size of the ac input end of AC-DC module 12 to realize under control of the control signal
The voltage x current of regulation DC output end LED+.
Power converting loop 11 can realize that it adjusts the AC power being input into by incoming control signal with prior art
In output to AC-DC module 12 after circuit.
AC-DC module 12 includes transformer T1, rectifier D1 and filter capacitor C1, the primary coil and power of transformer T1
The output end connection of conversing circuits 11, rectifier D1 one end is connected with one end of the secondary coil of transformer T1, transformer T1's
The other end ground connection of secondary coil, the rectifier D1 other ends are grounded by filter capacitor C1, and as the direct current of AC-DC module 12
Output end LED+.
Rectifier D1 is commutation diode, and the anode of the commutation diode connects one end of the secondary coil of transformer T1, cloudy
Pole meets filter capacitor C1.
Detection control module 14 include first switch pipe Q1, second switch pipe Q2, photoelectrical coupler OP1, first resistor R1,
Second resistance R2,3rd resistor R3, the 4th resistance R4 and the 5th resistance R5.
The control end of first switch pipe Q1 connects the negative pole of LED 10, the output of first switch pipe Q1 by first resistor R1
End ground connection, and by second resistance R2, the negative pole of LED 10, the hair of the input termination photoelectrical coupler OP1 of first switch pipe Q1
The output end of light source, the input of the light emitting source of photoelectrical coupler OP1 connected the direct current that 3rd resistor R3 connects AC-DC module 12
Output end LED+.
The output head grounding of the light-receiving device of photoelectrical coupler OP1, the input termination second of the light-receiving device of photoelectrical coupler OP1
The control end of switching tube Q2, also meets working power VCC, the output head grounding of second switch pipe Q2, second by the 4th resistance R4
One end of the 5th resistance R5 of input termination of switching tube Q2, second end of the 5th resistance R5 is used as the output for detecting control module 14
End.
Preferably, first switch pipe Q1 and second switch pipe Q2 is NPN type triode, first switch pipe Q1 and second switch
The input of pipe Q2, output end, control end are respectively colelctor electrode, emitter stage, the base stage of NPN type triode.
Power supply IC modules 13 include driving power supply chip U1, the 6th resistance R6 and the 7th resistance R7, driving power supply chip U1
Power pins 6 meet working power VCC, the feedback pin 7 of driving power supply chip U1 is terminated as the feedback of power supply IC modules 13
The output end of control module 14 is detected, the output pin 8 of driving power supply chip U1 terminates work(as the output of power supply IC modules 13
The control end of rate conversing circuits 11；The one termination working power VCC of the 6th resistance R6, another termination detects the defeated of control module 14
Go out end, and be grounded by the 7th resistance R7.Driving power supply chip U1 is common driving power supply chip, can be using with above-mentioned work(
The existing chip of energy.Driving power supply chip U1 is pwm chip, and the control signal of its output pin 8 output is adjustable accounting for
The pwm signal of empty ratio, or adjustable size current signal.
The operation principle of LED drive circuit is illustrated with the course of work of one of LED 10：
During driving power supply chip U1 energization work, electric current is by rectifier D1, the positive pole of LED 10, the negative pole of LED 10,
Two resistance R2 to ground.Electric current produces a 0.7V voltages, 0.7V voltages to be added in first through first resistor R1 on second resistance R2
Between the base stage of switching tube Q1, the collector and emitter conducting of first switch pipe Q1, the light emitting source of photoelectrical coupler OP1 is powered
Luminous, the light-receiving device conducting of photoelectrical coupler OP1, the base voltage of second switch pipe Q2 disappears.Second switch pipe Q2 ends, the
Five resistance R5 open circuits.7th resistance R7 both end voltages rise, and output current increases, then access driving power supply chip U1 feedback pins
7 voltage rises.The control signal for exporting driving power supply chip U1 increases, and the alternating current of the regulation of power converting loop 11 increases
Greatly, then DC output end LED+ output currents increase.Driving power supply chip U1 is the power supply IC with simulation dimming function, feedback
The pin voltage of pin 7 determines the dutycycle or size of current of the pwm signal of the output of output pin 8.Driving power supply chip U1's is anti-
Present voltage=(R7/R5)/(R6+R7/R5) of pin 7.
Conversely, when LED 10 takes down, first switch pipe Q1 cut-offs, photoelectrical coupler OP1 does not have operating current, second
Switching tube Q2 is turned on.5th resistance R5 is in parallel with the 7th resistance R7 by the grounded emitter of second switch pipe Q2.Driving power supply
The voltage step-down of feedback pin 7 of chip U1, the output control signal step-down of output pin 8, the exchange of the regulation of power converting loop 11
Electric current diminishes, then the reduction of DC output end LED+ output currents.The operation principle of other LEDs 10 is identical.
Above-mentioned LED drive circuit has detected whether that LED 10 is accessed by using detection control module 14, and detection is believed
Power supply IC modules 13 number are input to, power supply IC modules 13 adjust the dutycycle of its control signal so that power turns according to detection signal
The input current size of the ac input end of the regulation of road 11 AC-DC module 12 is gained, that is, realizes that the power supply of LED 10 is adjusted
Section, realizes 1 driving power supply band multiple LED 10, realizes power adaptive, saves cost.Illuminated in LED support fluorescent tube,
With market widely, the more present many lamp schemes of support, cost drop 30% or so.
Below only described is the preferred embodiment of the application, is not used to limit the application, all essences in the application
Any modification, equivalent and improvement made within god and principle etc., should be included within the protection domain of the application.
Claims (6)
1. a kind of LED drive circuit, can drive multiple LEDs, including incoming transport and the work(for adjusting alternating current size
Rate conversing circuits and the AC-DC module for turning direct current for exchanging, it is characterised in that also including for being carried to the power converting loop
Power supply IC modules and multiple for adjustable control signal is for detecting the detection the control module whether LED accesses；
Wherein, the ac input end of the AC-DC module connects the output end of the power converting loop, the AC-DC module
Direct current output terminates the positive pole of each LED；The corresponding LED of input termination of each detection control module
Negative pole, the feedback end of the output termination power supply IC modules；The output of the power supply IC modules terminates the power and converts back
The controlled end on road；The power supply IC modules 13 detect that the access state regulation of the LED is defeated according to the detection control module
Go out the size of the control signal to the power converting loop, so that the power converting loop adjusts the AC-DC module
The input current size of ac input end.
2. LED drive circuit as claimed in claim 1, it is characterised in that the detection control module include first switch pipe,
Second switch pipe, photoelectrical coupler, first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th resistance, wherein：
The control end of the first switch pipe connects the negative pole of the LED by the first resistor, the first switch pipe
Output head grounding, and by the negative pole of LED described in the second resistance, the input of the first switch pipe terminates the photoelectricity
The output end of the light emitting source of coupler, the input of the light emitting source of the photoelectrical coupler connected the 3rd resistor and connect described
The DC output end of AC-DC module；
The output head grounding of the light-receiving device of the photoelectrical coupler, the input termination described the of the light-receiving device of the photoelectrical coupler
The control end of two switching tubes, also connects working power by the 4th resistance, and the output head grounding of the second switch pipe is described
One end of input termination the 5th resistance of second switch pipe, the second end of the 5th resistance controls mould as the detection
The output end of block.
3. LED drive circuit as claimed in claim 2, it is characterised in that the first switch pipe and second switch pipe are NPN
The input of type triode, the first switch pipe and second switch pipe, output end, control end are respectively NPN type triode
Colelctor electrode, emitter stage, base stage.
4. LED drive circuit as claimed in claim 1 or 2, it is characterised in that the power supply IC modules include driving power supply core
Piece, the 6th resistance and the 7th resistance, the power pins of the driving power supply chip connect working power, the driving power supply chip
Feedback pin terminates the output end of the detection control module, the driving power supply chip as the feedback of the power supply IC modules
Output pin as the output termination power converting loop of the power supply IC modules controlled end；6th resistance
One termination working power, the output end of another termination detection control module, and by the 7th resistance eutral grounding.
5. LED drive circuit as claimed in claim 1 or 2, it is characterised in that the AC-DC module includes transformer, rectification
Device and filter capacitor, the primary coil of the transformer are connected with the output end of the power converting loop, the rectifier one
End is connected with one end of the secondary coil of the transformer, the other end ground connection of the secondary coil of the transformer, the rectification
The device other end is grounded by the filter capacitor, and as the DC output end of the AC-DC module.
6. LED drive circuit as claimed in claim 5, it is characterised in that the rectifier is commutation diode, the rectification two
The anode of pole pipe connects one end of the secondary coil of the transformer, and negative electrode connects the filter capacitor.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2015/098754 WO2017107146A1 (en) | 2015-12-24 | 2015-12-24 | Led drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206212329U true CN206212329U (en) | 2017-05-31 |
Family
ID=58755822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201590000102.1U Expired - Fee Related CN206212329U (en) | 2015-12-24 | 2015-12-24 | A kind of LED drive circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN206212329U (en) |
| WO (1) | WO2017107146A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667274A (en) * | 2018-05-22 | 2018-10-16 | 青岛海尔智能技术研发有限公司 | The control circuit of driving plate power supply output |
| CN113194574A (en) * | 2021-03-11 | 2021-07-30 | 达理光线智能科技股份有限公司 | Time-delay lamp turning-off device |
| CN114364095A (en) * | 2022-02-21 | 2022-04-15 | 深圳市金永信科技有限公司 | Medium-power combined dimming LED driving power supply |
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| CN107734778B (en) * | 2017-11-13 | 2024-02-09 | 美智光电科技股份有限公司 | LED driving power circuit and light emitting device |
| CN107917770B (en) * | 2017-12-07 | 2023-06-16 | 太原理工大学 | Road subgrade pressure detection device with long-distance transmission and anti-interference functions |
| CN107896403B (en) * | 2017-12-20 | 2024-03-12 | 广东恒润光电有限公司 | LED power supply |
| CN110139445A (en) * | 2019-05-31 | 2019-08-16 | 深圳市奋勇光电有限公司 | A kind of electricity and brightness adjustment control two-in-one circuit |
| CN111835326B (en) * | 2020-07-29 | 2023-08-18 | 成都通用整流电器研究所 | Module safety control protection and indication circuit based on IGBT drive |
| CN114080078B (en) * | 2020-08-10 | 2024-02-20 | 苏州斯特雷电子有限公司 | Intelligent driver and driving method for LED lamp strip |
| CN113645738A (en) * | 2021-07-22 | 2021-11-12 | 西安中科微星光电科技有限公司 | Light source control circuit |
| CN116247796A (en) * | 2023-03-02 | 2023-06-09 | 深圳市景欣泰家居用品有限公司 | Circuit system of dual-mode blower and control method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101730332B (en) * | 2008-10-14 | 2013-02-20 | 聚积科技股份有限公司 | Driving circuit of light-emitting diode |
| CN101631410B (en) * | 2009-08-24 | 2013-03-06 | 英飞特电子（杭州）股份有限公司 | AC-DC LED drive circuit with high power factor |
| CN102821509A (en) * | 2011-06-08 | 2012-12-12 | 聚积科技股份有限公司 | AC/DC dual-purpose LED drive circuit |
| CN102724793A (en) * | 2012-05-21 | 2012-10-10 | 四川新力光源有限公司 | Gesture-controlled LED lighting device |
| TW201406208A (en) * | 2012-07-30 | 2014-02-01 | Luxul Technology Inc | High-efficiency alternating current LED driving circuit |
-
2015
- 2015-12-24 CN CN201590000102.1U patent/CN206212329U/en not_active Expired - Fee Related
- 2015-12-24 WO PCT/CN2015/098754 patent/WO2017107146A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667274A (en) * | 2018-05-22 | 2018-10-16 | 青岛海尔智能技术研发有限公司 | The control circuit of driving plate power supply output |
| CN108667274B (en) * | 2018-05-22 | 2020-08-11 | 青岛海尔智能技术研发有限公司 | Control circuit for driving power output of board |
| CN113194574A (en) * | 2021-03-11 | 2021-07-30 | 达理光线智能科技股份有限公司 | Time-delay lamp turning-off device |
| CN114364095A (en) * | 2022-02-21 | 2022-04-15 | 深圳市金永信科技有限公司 | Medium-power combined dimming LED driving power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017107146A1 (en) | 2017-06-29 |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20201224 |