CN204929312U - LED power driving circuit - Google Patents
LED power driving circuit Download PDFInfo
- Publication number
- CN204929312U CN204929312U CN201520701144.XU CN201520701144U CN204929312U CN 204929312 U CN204929312 U CN 204929312U CN 201520701144 U CN201520701144 U CN 201520701144U CN 204929312 U CN204929312 U CN 204929312U
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- electric capacity
- diode
- rectifier bridge
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Abstract
The utility model discloses a LED power driving circuit, including rectifier bridge Q, transformer T, diode D1, three terminal regulator U1, resistance R1, electric capacity C1 and triode VT1, transformer T coil L1 connects 220V alternating current both ends respectively in both ends, rectifier bridge Q pin 1 and diode D1 negative pole are connected respectively to transformer T coil L2 one end, 2 inputs of connecting electric capacity C1 and three terminal regulator U1 respectively of rectifier bridge Q pin, the transformer T coil L2 other end is connected to rectifier bridge Q pin 3, the electric capacity C1 other end is connected respectively to rectifier bridge Q pin 4, electric capacity C3, triode VT1 collecting electrode, electric capacity C2, diode D3 is anodal, electric capacity C6, electric capacity C4 and emitting diode LED negative pole end. The utility model discloses LED power driving circuit adds power factor correction module at the last utmost point of circuit, and circuit structure is simple, and is with low costs, and the steady voltage is effectual, especially adapted using widely.
Description
Technical field
The utility model relates to a kind of LED, specifically a kind of LED power drive circuit.
Background technology
More existing LED lamp drive circuit all adopt optocoupler to carry out isolation drive, and circuit structure is complicated, and cost is high, and without Active PFC function, less stable.
Utility model content
The purpose of this utility model is to provide a kind of LED power 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 power drive circuit, comprises rectifier bridge Q, transformer T, diode D1, three terminal regulator U1, resistance R1, electric capacity C1 and triode VT1, described transformer T coil L1 two ends connect 220V alternating current two ends respectively, transformer T coil L2 one end connects rectifier bridge Q pin 1 and diode D1 negative pole respectively, rectifier bridge Q pin 2 connects the input of electric capacity C1 and three terminal regulator U1 respectively, the rectifier bridge Q pin 3 connection transformer T coil L2 other end, rectifier bridge Q pin 4 connects the electric capacity C1 other end respectively, electric capacity C3, triode VT1 collector electrode, electric capacity C2, diode D3 positive pole, electric capacity C6, electric capacity C4 and LED negative pole end, the electric capacity C3 other end connects three terminal regulator U1 earth terminal respectively, resistance R1, triode VT1 emitter and resistance R2, the resistance R2 other end connects the electric capacity C2 other end respectively, triode VT1 base stage and diode D2 positive pole, diode D2 negative pole connects diode D1 positive pole respectively, three terminal regulator U1 output, the resistance R1 other end, electric capacity C5, diode D5 negative pole, the electric capacity C4 other end and LED positive terminal, diode D5 positive pole connects diode D4 negative pole and the electric capacity C6 other end respectively, and diode D4 positive pole connects the electric capacity C5 other end and diode D3 negative pole respectively.
As the utility model further scheme: described three terminal regulator U1 model is 7805.
Compared with prior art, the beneficial effects of the utility model are: the utility model LED power drive circuit adds power factor correction module in pole, circuit end, and circuit structure is simple, and cost is low, and voltage regulation result is good, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of LED power 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 power drive circuit, comprises rectifier bridge Q, transformer T, diode D1, three terminal regulator U1, resistance R1, electric capacity C1 and triode VT1, transformer T coil L1 two ends connect 220V alternating current two ends respectively, transformer T coil L2 one end connects rectifier bridge Q pin 1 and diode D1 negative pole respectively, rectifier bridge Q pin 2 connects the input of electric capacity C1 and three terminal regulator U1 respectively, the rectifier bridge Q pin 3 connection transformer T coil L2 other end, rectifier bridge Q pin 4 connects the electric capacity C1 other end respectively, electric capacity C3, triode VT1 collector electrode, electric capacity C2, diode D3 positive pole, electric capacity C6, electric capacity C4 and LED negative pole end, the electric capacity C3 other end connects three terminal regulator U1 earth terminal respectively, resistance R1, triode VT1 emitter and resistance R2, the resistance R2 other end connects the electric capacity C2 other end respectively, triode VT1 base stage and diode D2 positive pole, diode D2 negative pole connects diode D1 positive pole respectively, three terminal regulator U1 output, the resistance R1 other end, electric capacity C5, diode D5 negative pole, the electric capacity C4 other end and LED positive terminal, diode D5 positive pole connects diode D4 negative pole and the electric capacity C6 other end respectively, and diode D4 positive pole connects the electric capacity C5 other end and diode D3 negative pole respectively.
Three terminal regulator U1 model is 7805.
Operation principle of the present utility model is: refer to Fig. 1, the AC power of 220V is through transformer T transformation, export 15V alternating voltage to rectifier bridge Q, again by C1 filtering, after 7805 voltage stabilizings, wherein triode VT1, R3, C2 forms soft start, prevent that instantaneous voltage is excessive causes damage to circuit, R1 is sample resistance, the ripple of C3 on filtering R1, D1, D2 shields, C4 can prevent output voltage from producing from agitating, the electric capacity C5 of circuit end, electric capacity C6, diode D3, diode D4 and diode D6 forms one by streaming circuit realiration power factor emendation function.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (2)
1. a LED power drive circuit, comprises rectifier bridge Q, transformer T, diode D1, three terminal regulator U1, resistance R1, electric capacity C1 and triode VT1, 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 rectifier bridge Q pin 1 and diode D1 negative pole respectively, rectifier bridge Q pin 2 connects the input of electric capacity C1 and three terminal regulator U1 respectively, the rectifier bridge Q pin 3 connection transformer T coil L2 other end, rectifier bridge Q pin 4 connects the electric capacity C1 other end respectively, electric capacity C3, triode VT1 collector electrode, electric capacity C2, diode D3 positive pole, electric capacity C6, electric capacity C4 and LED negative pole end, the electric capacity C3 other end connects three terminal regulator U1 earth terminal respectively, resistance R1, triode VT1 emitter and resistance R2, the resistance R2 other end connects the electric capacity C2 other end respectively, triode VT1 base stage and diode D2 positive pole, diode D2 negative pole connects diode D1 positive pole respectively, three terminal regulator U1 output, the resistance R1 other end, electric capacity C5, diode D5 negative pole, the electric capacity C4 other end and LED positive terminal, diode D5 positive pole connects diode D4 negative pole and the electric capacity C6 other end respectively, and diode D4 positive pole connects the electric capacity C5 other end and diode D3 negative pole respectively.
2. LED power drive circuit according to claim 1, is characterized in that, described three terminal regulator U1 model is 7805.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520701144.XU CN204929312U (en) | 2015-09-07 | 2015-09-07 | LED power driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520701144.XU CN204929312U (en) | 2015-09-07 | 2015-09-07 | LED power driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204929312U true CN204929312U (en) | 2015-12-30 |
Family
ID=54978404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520701144.XU Expired - Fee Related CN204929312U (en) | 2015-09-07 | 2015-09-07 | LED power driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204929312U (en) |
-
2015
- 2015-09-07 CN CN201520701144.XU patent/CN204929312U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20151230 Termination date: 20160907 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |