CN102781145A - LED (light emitting diode) drive power circuit - Google Patents
LED (light emitting diode) drive power circuit Download PDFInfo
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- CN102781145A CN102781145A CN2012102621905A CN201210262190A CN102781145A CN 102781145 A CN102781145 A CN 102781145A CN 2012102621905 A CN2012102621905 A CN 2012102621905A CN 201210262190 A CN201210262190 A CN 201210262190A CN 102781145 A CN102781145 A CN 102781145A
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Abstract
The invention discloses an LED (light emitting diode) drive power circuit. The LED drive power circuit comprises a first-stage lightning protection circuit (1) used for preventing direct stroke from damaging a drive circuit and connected with a second-stage lightning protection circuit (2) through a lead wire, the second-stage lightning protection circuit (2) used for preventing overvoltage caused by lightning induction from damaging the drive circuit and connected with a rectifier bridge circuit (3) through the lead wire, the rectifier bridge circuit (3) used for performing full-wave rectification on a sine voltage waveform of 220V/50Hz and connected with a constant current circuit (4) through the lead wire, and the constant current circuit (4) used for limiting effective value of current flowing through a load LED and providing constant current power for LED lamps. According to the LED drive power circuit, the problems restraining the development of LED lamps, which are caused by short service life, poor electromagnetic interference and poor electromagnetic compatibility, poor stability and low possibility of volume reduction and the like that result from the adoption of a switch power as an LED lamp drive power at present, are solved.
Description
Technical field
The invention belongs to the drive circuit technical field, relate in particular to a kind of LED driving power circuit.
Background technology
LED (Light Emitting Diode) is the abbreviation of semiconductor light-emitting-diode; This is a kind of solid state light emitter; Have long, advantage such as light efficiency is high, radiationless, response time weak point, low-power consumption, shock resistance are strong of life-span, in addition, in the spectrum that LED produced; Not having ultraviolet ray, infrared ray, heat and radiation, is typical green illumination light source.Have benefited from the above-mentioned advantage that LED possesses, popularize as large tracts of land such as the illuminating lamp of light source, decorative lamp etc. with LED at present and come, wherein regional spreading speed such as Europe, the U.S., Japan is very fast.The LED product was also progressively replacing conventional lamp on China's illumination and decoration market over the past two years; But because the disappearance and the deficiency of relevant criterion; The quality differential of present domestic LED lamp is bigger, and except that led light source, driving power is another key technology of this type illuminating product.Current, Switching Power Supply is the main flow Driving technique of LED lamp, and this power supply need wherein need be used a large amount of electrochemical capacitors and realize functions such as filtering and power back-off through high frequency transformer with the voltage step-down, and this will certainly shorten the useful life of driving power greatly.Shortcomings such as Switching Power Supply has electromagnetic interference and electromagnetic compatibility problem is outstanding, poor stability, the life-span is short, volume is difficult for dwindling, these shortcomings all will become the obstacle that restriction LED lamp further develops.
Summary of the invention
The technical problem that the present invention will solve: a kind of LED driving power circuit is provided; Short useful life to solve the driving power that present employing Switching Power Supply causes as the LED lamp driving power source, electromagnetic interference and electromagnetic compatibility are poor, poor stability, the life-span is short and volume such as is difficult for dwindling at the problem that restriction LED lamp develops.
Technical scheme of the present invention:
A kind of LED driving power circuit, it comprises:
The anti-thunderbolt of one-level protective circuit is used to prevent that direct lightning strike from causing damage to drive circuit, is connected through lead with the anti-thunderbolt of secondary protective circuit;
The anti-thunderbolt of secondary protective circuit is used to prevent to respond to the overvoltage that thunder causes drive circuit is caused damage; Be connected through lead with rectifier circuit;
Rectifier circuit is used for the sinusoidal voltage waveform of 220V/50Hz is carried out full-wave rectification; Be connected through lead with constant-current circuit;
Constant-current circuit is used to limit the current effective value that flows through load LED, for the LED lamp provides constant-current supply.
The anti-thunderbolt of one-level protective circuit comprises three two-way discharge pipes, and three two-way discharge pipes are connected between live wire and the zero line, between live wire and the ground and between zero line and the ground, and ground wire is connected with the metal shell of light fixture.
The anti-thunderbolt of secondary protective circuit comprises that one can be recovered fuse and a two-way transient state diode, can recover fuse and be serially connected on the live wire, and two-way transient state diode is attempted by between live wire and the zero line.
Rectifier circuit is the full-wave rectification bridge circuit, comprises four unilateral diodes.
Constant-current circuit is composed in parallel by the constant current branch road, and the constant current branch road comprises a two ends constant flow module.
Beneficial effect of the present invention:
The present invention realizes the constant-current driving to the LED load through rectifier circuit and constant-current circuit; The parallel branch number of adjustment constant-current circuit and the parallel branch number of LED load can be realized the product of different capacity; Its operation principle is: input input 220V/50Hz alternating current is after the full-wave rectification bridge rectification; Obtaining peak value at the positive and negative terminal of rectifier bridge is that 311V, cycle are the half-sinusoid pulsating voltage of π, and its mean value is about 197V; Optimize the LED quantity that each paths of LEDs load is connected; Make the two ends constant flow module voltage on each constant current branch road reach its constant current cut-in voltage; Thereby guarantee that rectifier circuit output is limited in the load current value of LED through the current effective value that will flow through each paths of LEDs load behind the constant-current circuit; If need extended power, way is propped up in expansion parallel connection rectification that only need be corresponding and LED load branch number gets final product.When the input ac voltage effective value fluctuateed, the mean value of the pulsating voltage after the rectification is and then fluctuation also, and LED itself has the voltage clamp function when forward conduction, so the fluctuation of pulsating voltage mean value part basically all occurs on the constant flow module.Select the constant flow module of different constant current operating voltage ranges, can guarantee that the driving LED load is normally luminous in different AC-input voltage valid value ranges, obtain the product of different input voltage ranges; The anti-thunderbolt of one-level protective circuit realizes the direct striking thunder prevention protection to this drive circuit; For outdoor lighting lamp; Like LED street lamp direct lightning strike is a kind of comparatively serious and don't evitable destructive factor, receives direct lightning strike and does the time spent, very strong peak voltage can occur between live wire and the zero line, between live wire and the ground or between zero line and the ground; When detecting the crest voltage value above a certain high value; In three two-way discharge pipes one of them will conducting, produces short circuit and total lock of cutting off the electricity supply, and avoids subsequent conditioning circuit to damage because of the peak voltage effect that receives the direct lightning strike generation; The recovered fuse of the anti-thunderbolt of secondary protective circuit its keep electric current at least should be greater than the twice of driving power input current; The resistance that can recover fuse can be along with the rising of the increase of electric current or ambient temperature and is increased, thereby plays the effect of overcurrent protection and temperature-compensating; The two-way transient state diode voltage stabilizing value of the anti-thunderbolt of secondary protective circuit should be more than 350V, it with can recover fuse and constitute a bi-directional voltage stabilizing circuit together, realize the overvoltage protection of driving power input is protected with the anti-induction thunder; The present invention compared with prior art has the following advantages: circuit structure is simple, volume is little, the AC-input voltage wide ranges, do not have high-frequency electromagnetic interference, good stability, life-span long; It is short useful life to have solved the driving power that present employing Switching Power Supply causes as the LED lamp driving power source, and electromagnetic interference and electromagnetic compatibility are poor, poor stability, the life-span is short and volume such as is difficult for dwindling at the problem that restriction LED lamp develops.
Description of drawings:
Fig. 1 is an elementary diagram of the present invention.
Embodiment:
A kind of LED driving power circuit, it comprises (see figure 1):
The anti-thunderbolt of one-level protective circuit 1; Be used to prevent that direct lightning strike from causing damage to drive circuit; Is connected through lead with the anti-thunderbolt of secondary protective circuit 2, the one-level protective circuit 1 of preventing being struck by lightning comprises three two-way discharge pipe F1, F2 and F3, and three two-way discharge pipe F1, F2 and F3 are connected between live wire and the zero line, between live wire and the ground and between zero line and the ground; Ground wire is connected with the metal shell of light fixture; The peak value of the alternating current 220V/50Hz power supply of power input V1 and the input of V2 two ends is about 311V, and under the normal operation of LED lamp, the effective value of its input ac voltage generally can not surpass 300V.The peak value of 300V/50Hz alternating current is about 424V, only waits in particular cases receiving thunderbolt, just can very high peak voltage occur at the input of driving power, the peak value of the peak value that makes input voltage during above operate as normal.When between live wire and the zero line, between live wire and the ground or the crest voltage value between zero line and the ground surpass the one-level lightning protection point that sets, one of them discharge tube conducting produces short circuit and cuts off the electricity supply.
The anti-thunderbolt of secondary protective circuit 2 is used to prevent to respond to the overvoltage that thunder causes drive circuit is caused damage; Be connected through lead with rectifier circuit 3; The anti-thunderbolt of secondary protective circuit 2 comprises that one can be recovered fuse FUSE and a two-way transient state diode TVS; Can recover fuse FUSE is serially connected on the live wire; Two-way transient state diode TVS is attempted by between live wire and the zero line, can recover fuse FUSE keep electric current greater than the 220V/50Hz input voltage time 2 times of corresponding input current; The voltage stabilizing value of two-way transient state diode TVS ± more than the 350V; Moment is released power greater than 600W, and the anti-thunderbolt of secondary protective circuit 2 essence are bi-directional voltage stabilizing circuit, surpass the voltage stabilizing value of two-way transient state diode TVS when voltage; Two-way transient state diode TVS limits it get off; Can recover fuse FUSE and play the effect of current-limiting resistance, and the resistance that can recover fuse FUSE can increase along with the increase of flowing through electric current, thereby expand the input voltage range of this circuit.In LED work, if because of lightning induction or other reasons induce the amplitude higher voltage between input lead, the voltage peak that obtains at the rectifier bridge ac input end all can be limited in being no more than the voltage stabilizing value of two-way transient state diode TVS.
Constant-current circuit 4 is used to limit the current effective value that flows through load LED, for the LED lamp provides constant-current supply; Constant-current circuit 4 is made up of several two ends constant flow module parallel connections; The constant current value of selected constant flow module is by the rated current decision of used LED load, and the constant current voltage range is by the required input AC current effective value scope decision that reaches of product, and the voltage that the LED quantity of adjustment series connection makes the constant flow module two ends is greater than its constant current starting voltage; The electric current finite value of guaranteeing to flow through LED is near its load current value; Realization is to the constant-current driving of LED, because the LED of forward conduction itself has the voltage clamp function, when the input ac voltage effective value rises; Through the average voltage that has more after the rectification mainly is to fall on constant flow module, can not make LED overvoltage occur.The voltage output end Vout of constant-current circuit 4 connects the positive pole of LED, and the negative pole of LED meets the earth terminal GND of rectifier circuit 3.Realization is carried out driving power to the LED lamp.
Claims (5)
1. LED driving power circuit, it comprises:
The anti-thunderbolt of one-level protective circuit (1) is used to prevent that direct lightning strike from causing damage to drive circuit, is connected through lead with secondary anti-thunderbolt protective circuit (2);
The anti-thunderbolt of secondary protective circuit (2) is used to prevent to respond to the overvoltage that thunder causes drive circuit is caused damage; Be connected through lead with rectifier circuit (3);
Rectifier circuit (3) is used for the sinusoidal voltage waveform of 220V/50Hz is carried out full-wave rectification; Be connected through lead with constant-current circuit (4);
Constant-current circuit (4) is used to limit the current effective value that flows through load LED, for the LED lamp provides constant-current supply.
2. a kind of LED driving power circuit according to claim 1; It is characterized in that: one-level anti-thunderbolt protective circuit (1) comprises three two-way discharge pipe F1, F2 and F3; Three two-way discharge pipe F1, F2 and F3 are connected between live wire and the zero line, between live wire and the ground and between zero line and the ground, ground wire is connected with the metal shell of light fixture.
3. a kind of LED driving power circuit according to claim 1; It is characterized in that: secondary anti-thunderbolt protective circuit (2) comprises that one can be recovered fuse FUSE and a two-way transient state diode TVS; Can recover fuse FUSE and be serially connected on the live wire, two-way transient state diode TVS is attempted by between live wire and the zero line.
4. a kind of LED driving power circuit according to claim 1 is characterized in that: rectifier circuit (3) is the full-wave rectification bridge circuit, comprises four unilateral diode D1, D2, D3 and D4.
5. a kind of LED driving power circuit according to claim 1 is characterized in that: constant-current circuit (4) is composed in parallel by the constant current branch road, and the constant current branch road comprises a two ends constant flow module CRP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102621905A CN102781145A (en) | 2012-07-27 | 2012-07-27 | LED (light emitting diode) drive power circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102621905A CN102781145A (en) | 2012-07-27 | 2012-07-27 | LED (light emitting diode) drive power circuit |
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| CN102781145A true CN102781145A (en) | 2012-11-14 |
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| CN2012102621905A Pending CN102781145A (en) | 2012-07-27 | 2012-07-27 | LED (light emitting diode) drive power circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946678A (en) * | 2012-12-01 | 2013-02-27 | 宁波市镇海华泰电器厂 | Pulse-type driving power supply for thunder-resisting temperature-controlling light-dimming LED (Light Emitting Diode) lamp |
| CN102946677A (en) * | 2012-12-01 | 2013-02-27 | 宁波市镇海华泰电器厂 | Pulse-type driving power supply for thunder-resisting temperature-controlling light-dimming LED (Light Emitting Diode) lamp |
| WO2015013960A1 (en) * | 2013-07-29 | 2015-02-05 | 深圳市日上光电股份有限公司 | Led protection device |
| CN104981074A (en) * | 2015-07-13 | 2015-10-14 | 芜湖市神龙新能源科技有限公司 | Lightning protection method for LED street lamp |
| CN105101555A (en) * | 2015-08-20 | 2015-11-25 | 电子科技大学 | LED constant current driving chip |
| CN107462767A (en) * | 2017-09-18 | 2017-12-12 | 广州城市职业学院 | plasma probe measurement and control system |
| US11190002B2 (en) | 2018-01-26 | 2021-11-30 | Hewlett Packard Enterprise Development Lp | Circuits to identify protection device failures |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201466706U (en) * | 2009-06-09 | 2010-05-12 | 上海臻和防雷电气技术有限责任公司 | Anti-lightning protection circuit of RS485 serial communication interface |
| CN201518415U (en) * | 2009-09-17 | 2010-06-30 | 成都兴业雷安电子有限公司 | DC power feed type antenna feeder lightning protection device |
| CN201590660U (en) * | 2009-12-25 | 2010-09-22 | 陆利根 | 220V alternating current power lightning protection protector |
| CN201994658U (en) * | 2011-04-29 | 2011-09-28 | 广州华炜科技有限公司 | Signal lightning protection device with function of failure detection |
| CN102594112A (en) * | 2012-03-01 | 2012-07-18 | 杭州乐图光电科技有限公司 | Anti-lightning surge circuit of switching power supply and switching power supply using same |
| CN202696988U (en) * | 2012-07-27 | 2013-01-23 | 贵州索立得光电科技有限公司 | LED (Light-Emitting Diode) driving device |
-
2012
- 2012-07-27 CN CN2012102621905A patent/CN102781145A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201466706U (en) * | 2009-06-09 | 2010-05-12 | 上海臻和防雷电气技术有限责任公司 | Anti-lightning protection circuit of RS485 serial communication interface |
| CN201518415U (en) * | 2009-09-17 | 2010-06-30 | 成都兴业雷安电子有限公司 | DC power feed type antenna feeder lightning protection device |
| CN201590660U (en) * | 2009-12-25 | 2010-09-22 | 陆利根 | 220V alternating current power lightning protection protector |
| CN201994658U (en) * | 2011-04-29 | 2011-09-28 | 广州华炜科技有限公司 | Signal lightning protection device with function of failure detection |
| CN102594112A (en) * | 2012-03-01 | 2012-07-18 | 杭州乐图光电科技有限公司 | Anti-lightning surge circuit of switching power supply and switching power supply using same |
| CN202696988U (en) * | 2012-07-27 | 2013-01-23 | 贵州索立得光电科技有限公司 | LED (Light-Emitting Diode) driving device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946678A (en) * | 2012-12-01 | 2013-02-27 | 宁波市镇海华泰电器厂 | Pulse-type driving power supply for thunder-resisting temperature-controlling light-dimming LED (Light Emitting Diode) lamp |
| CN102946677A (en) * | 2012-12-01 | 2013-02-27 | 宁波市镇海华泰电器厂 | Pulse-type driving power supply for thunder-resisting temperature-controlling light-dimming LED (Light Emitting Diode) lamp |
| CN102946677B (en) * | 2012-12-01 | 2014-10-15 | 宁波市镇海华泰电器厂 | Pulse-type driving power supply for thunder-resisting temperature-controlling light-dimming LED (Light Emitting Diode) lamp |
| CN102946678B (en) * | 2012-12-01 | 2014-10-29 | 宁波市镇海华泰电器厂 | Pulse-type driving power supply for thunder-resisting temperature-controlling light-dimming LED (Light Emitting Diode) lamp |
| WO2015013960A1 (en) * | 2013-07-29 | 2015-02-05 | 深圳市日上光电股份有限公司 | Led protection device |
| CN104981074A (en) * | 2015-07-13 | 2015-10-14 | 芜湖市神龙新能源科技有限公司 | Lightning protection method for LED street lamp |
| CN105101555A (en) * | 2015-08-20 | 2015-11-25 | 电子科技大学 | LED constant current driving chip |
| CN105101555B (en) * | 2015-08-20 | 2017-10-27 | 电子科技大学 | A kind of LED constant current driving chip |
| CN107462767A (en) * | 2017-09-18 | 2017-12-12 | 广州城市职业学院 | plasma probe measurement and control system |
| US11190002B2 (en) | 2018-01-26 | 2021-11-30 | Hewlett Packard Enterprise Development Lp | Circuits to identify protection device failures |
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Application publication date: 20121114 |