CN204761761U - LED drive circuit - Google Patents
LED drive circuit Download PDFInfo
- Publication number
- CN204761761U CN204761761U CN201520339644.3U CN201520339644U CN204761761U CN 204761761 U CN204761761 U CN 204761761U CN 201520339644 U CN201520339644 U CN 201520339644U CN 204761761 U CN204761761 U CN 204761761U
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- electric capacity
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- 239000004065 semiconductor Substances 0.000 claims description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 3
- 229910052710 silicon Inorganic materials 0.000 abstract 3
- 239000010703 silicon Substances 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical group [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a LED drive circuit, including transformer T, the rectifier bridge, electric capacity C1, electric capacity C2, resistance R1, triode VT1, MOS pipe VR and one -way silicon controlled rectifier VS, transformer T coil L1 connects 220V alternating current both ends respectively in both ends, electric capacity C2 and rectifier bridge Q pin 1 are connected respectively to transformer T coil L2 one end, the transformer T coil L2 other end is connected to rectifier bridge Q pin 3, electric capacity C1 is connected respectively to rectifier bridge Q pin 4, electric capacity C6, one -way silicon controlled rectifier VS's the A utmost point, electric capacity C4, diode D7 negative pole and LED negative pole, it is anodal that diode D6 is connected respectively to rectifier bridge Q pin 2, electric capacity C3 and MOS pipe VR's the D utmost point. The utility model discloses a practical MOS pipe VR and the cooperation of one -way silicon controlled rectifier VS, can be stable provide constant current drive for LED, do not use any chip element, the interference killing feature is strong, stability is very high, circuit structure is simple moreover, and is with low costs, especially adapted using widely.
Description
Technical field
The utility model relates to a kind of drive circuit, specifically a kind of LED drive circuit.
Background technology
In energy crisis and climate warming problem more and more serious today, energy-conservationly become social focus subject under discussion with environmental protection.LED gets more and more people's extensive concerning because of features such as plurality of advantages such as it is efficient, energy-saving and environmental protection, life-span length, rich color, little, the resistance to flicker of volume, reliability are high, regulation and control are convenient, is considered to 21 century the most promising lighting source.Traditional incandescent lamp efficiency is low, power consumption is high; Fluorescent lamp power saving, but useful life is short, frangible, and there is mercury pollution in discarded object; There is the shortcomings such as efficiency is low, power consumption is high, the life-span is short, hazards of electromagnetic radiation in high-intensity gas discharge lamp; If current poor efficiency, the traditional lighting of highly energy-consuming can be replaced with LED illumination, current more and more urgent energy shortage and ecological deterioration problem can be alleviated undoubtedly.Due to voltage-current characteristic and the temperature characterisitic of LED self, make the susceptibility of LED to electric current be higher than susceptibility to voltage, therefore can not be powered directly to LED by traditional power supply.Therefore, make with LED the problem that first lighting source will solve power drives, the most complex structure of existing LED drive circuit, cost is high and efficiency is low.
Utility model content
The purpose of this utility model is to provide a kind of circuit structure simple LED drive circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of LED drive circuit, comprises transformer T, rectifier bridge, electric capacity C1, electric capacity C2, resistance R1, triode VT1, metal-oxide-semiconductor VR and one-way SCR VS, described transformer T coil L1 two ends connect 220V alternating current two ends respectively, transformer T coil L2 one end connects electric capacity C2 and rectifier bridge Q pin 1, the rectifier bridge Q pin 3 connection transformer T coil L2 other end respectively, and rectifier bridge Q pin 4 connects electric capacity C1 respectively, electric capacity C6, the A pole of one-way SCR VS, electric capacity C4, diode D7 negative pole and LED negative pole, rectifier bridge Q pin 2 connects diode D6 positive pole respectively, the D pole of electric capacity C3 and metal-oxide-semiconductor VR, diode D6 negative pole is connecting band woman's C2 other end and diode D5 positive pole respectively, and diode D5 negative pole connects the electric capacity C3 other end and resistance R1 respectively, and the resistance R1 other end connects the electric capacity C6 other end respectively, the G pole of metal-oxide-semiconductor VR, the K pole of triode VT1 collector electrode and one-way SCR VS, triode VT1 base stage connects S pole and the resistance R2 of metal-oxide-semiconductor VR respectively, and the resistance R2 other end is connecting triode VT1 emitter respectively, resistance R4, electric capacity C5 and resistance R5, the resistance R5 other end connects LED positive pole, and the described electric capacity C5 other end connects diode D7 positive pole and resistance R3 respectively, and the resistance R3 other end is the contact resistance R4 other end respectively, the G pole of the electric capacity C4 other end and one-way SCR VS.
As the utility model further scheme: described one-way SCR VS model is TL431.
Compared with prior art, the beneficial effects of the utility model are: the utility model coordinates by using metal-oxide-semiconductor VR and one-way SCR VS, can be stable provide constant current to drive to LED, do not use any chip component, antijamming capability is strong, and stability is very high, and circuit structure is simple, cost is low, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of LED drive circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of LED drive circuit, comprises transformer T, rectifier bridge, electric capacity C1, electric capacity C2, resistance R1, triode VT1, metal-oxide-semiconductor VR and one-way SCR VS, transformer T coil L1 two ends connect 220V alternating current two ends respectively, transformer T coil L2 one end connects electric capacity C2 and rectifier bridge Q pin 1, the rectifier bridge Q pin 3 connection transformer T coil L2 other end respectively, and rectifier bridge Q pin 4 connects electric capacity C1 respectively, electric capacity C6, the A pole of one-way SCR VS, electric capacity C4, diode D7 negative pole and LED negative pole, rectifier bridge Q pin 2 connects diode D6 positive pole respectively, the D pole of electric capacity C3 and metal-oxide-semiconductor VR, diode D6 negative pole is connecting band woman's C2 other end and diode D5 positive pole respectively, and diode D5 negative pole connects the electric capacity C3 other end and resistance R1 respectively, and the resistance R1 other end connects the electric capacity C6 other end respectively, the G pole of metal-oxide-semiconductor VR, the K pole of triode VT1 collector electrode and one-way SCR VS, triode VT1 base stage connects S pole and the resistance R2 of metal-oxide-semiconductor VR respectively, and the resistance R2 other end is connecting triode VT1 emitter respectively, resistance R4, electric capacity C5 and resistance R5, the resistance R5 other end connects LED positive pole, and the electric capacity C5 other end connects diode D7 positive pole and resistance R3 respectively, and the resistance R3 other end is the contact resistance R4 other end respectively, the G pole of the electric capacity C4 other end and one-way SCR VS.
One-way SCR VS model is TL431.
Operation principle of the present utility model is: refer to Fig. 1, 220V alternating current is through transformer T step-down, rectifier bridge Q rectification and electric capacity C1 filtering, in addition diode D5, diode D6, electric capacity C2 and electric capacity C3 forms voltage-multiplying circuit, resistance R4 and resistance R3 forms bleeder circuit, one-way SCR VS and resistance R1 forms sampling amplification circuit, triode VT1 and resistance R2 forms current-limiting protection circuit, metal-oxide-semiconductor VR adjusts pipe, electric capacity C5 is output filter capacitor, when output voltage reduces, f point current potential reduces, amplifying through one-way SCR VS inside makes e point voltage increase, after metal-oxide-semiconductor VR adjusts, b point current potential raises, otherwise, when output voltage increases, f point current potential raises, and e point current potential reduces, after metal-oxide-semiconductor VR adjusts, b point current potential reduces, thus make the constant current of stable output, when output current is greater than 5A, triode VT1 is in cut-off, within making output current be limited in 5A, thus reach the object of current limliting.
Claims (2)
1. a LED drive circuit, comprises transformer T, rectifier bridge, electric capacity C1, electric capacity C2, resistance R1, triode VT1, metal-oxide-semiconductor VR and one-way SCR VS, it is characterized in that, described transformer T coil L1 two ends connect 220V alternating current two ends respectively, transformer T coil L2 one end connects electric capacity C2 and rectifier bridge Q pin 1 respectively, the rectifier bridge Q pin 3 connection transformer T coil L2 other end, rectifier bridge Q pin 4 connects electric capacity C1 respectively, electric capacity C6, the A pole of one-way SCR VS, electric capacity C4, diode D7 negative pole and LED negative pole, rectifier bridge Q pin 2 connects diode D6 positive pole respectively, the D pole of electric capacity C3 and metal-oxide-semiconductor VR, diode D6 negative pole is connecting band woman's C2 other end and diode D5 positive pole respectively, and diode D5 negative pole connects the electric capacity C3 other end and resistance R1 respectively, and the resistance R1 other end connects the electric capacity C6 other end respectively, the G pole of metal-oxide-semiconductor VR, the K pole of triode VT1 collector electrode and one-way SCR VS, triode VT1 base stage connects S pole and the resistance R2 of metal-oxide-semiconductor VR respectively, and the resistance R2 other end is connecting triode VT1 emitter respectively, resistance R4, electric capacity C5 and resistance R5, the resistance R5 other end connects LED positive pole, and the described electric capacity C5 other end connects diode D7 positive pole and resistance R3 respectively, and the resistance R3 other end is the contact resistance R4 other end respectively, the G pole of the electric capacity C4 other end and one-way SCR VS.
2. LED drive circuit according to claim 1, is characterized in that, described one-way SCR VS model is TL431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520339644.3U CN204761761U (en) | 2015-05-22 | 2015-05-22 | LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520339644.3U CN204761761U (en) | 2015-05-22 | 2015-05-22 | LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204761761U true CN204761761U (en) | 2015-11-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520339644.3U Expired - Fee Related CN204761761U (en) | 2015-05-22 | 2015-05-22 | LED drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204761761U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343341A (en) * | 2017-08-07 | 2017-11-10 | 王陈伟 | A kind of emergency flight control system |
| CN107750074A (en) * | 2017-11-06 | 2018-03-02 | 江西美的贵雅照明有限公司 | Linear constant current LED drive circuit and light fixture |
| CN110032103A (en) * | 2019-04-09 | 2019-07-19 | 广西俊锦科技有限公司 | Intelligent building monitoring system |
-
2015
- 2015-05-22 CN CN201520339644.3U patent/CN204761761U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343341A (en) * | 2017-08-07 | 2017-11-10 | 王陈伟 | A kind of emergency flight control system |
| CN107750074A (en) * | 2017-11-06 | 2018-03-02 | 江西美的贵雅照明有限公司 | Linear constant current LED drive circuit and light fixture |
| CN107750074B (en) * | 2017-11-06 | 2024-01-09 | 美智光电科技股份有限公司 | Linear constant-current LED driving circuit and lamp |
| CN110032103A (en) * | 2019-04-09 | 2019-07-19 | 广西俊锦科技有限公司 | Intelligent building monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20151111 Termination date: 20170522 |