CN204761759U - LED drive circuit - Google Patents
LED drive circuit Download PDFInfo
- Publication number
- CN204761759U CN204761759U CN201520338982.5U CN201520338982U CN204761759U CN 204761759 U CN204761759 U CN 204761759U CN 201520338982 U CN201520338982 U CN 201520338982U CN 204761759 U CN204761759 U CN 204761759U
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- triode
- resistance
- electric capacity
- rectifier bridge
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Abstract
The utility model discloses a LED drive circuit, including rectifier bridge Q, resistance R1, electric capacity C1, diode D1, triode VT1, triode VT2 summation potential ware RP1, 220V alternating current both ends are connected respectively with rectifier bridge Q pin 2 to rectifier bridge Q pin 4, electric capacity C1 is connected respectively to rectifier bridge Q pin 1, resistance R1, triode VT1 collecting electrode and triode VT3 collecting electrode, the electric capacity C1 other end is connected respectively to rectifier bridge Q pin 3, electric capacity C2, resistance R2, diode D1 is anodal, resistance R5, electric capacity C3 and LED negative pole and ground connection. The utility model discloses the circuit component that LED drive circuit used is few, all is electronic component commonly used such as resistance moreover, and the price is very cheap, does not adopt chip element in addition, and the interference killing feature is strong.
Description
Technical field
The utility model relates to a kind of drive circuit, specifically a kind of LED drive circuit.
Background technology
The main force that LED threw light on as the modern times, the effect energy-conservation due to it and the performance of high brightness, very popular, but for LED, the stability of its driving voltage is extremely important, and existing commercially LED drive circuit is very many, mostly drives effective circuit all very complicated, and mostly adopting chip design, cost is higher.
Utility model content
The purpose of this utility model is the LED drive circuit providing a kind of cost low, 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 rectifier bridge Q, resistance R1, electric capacity C1, diode D1, triode VT1, triode VT2 and potentiometer RP1, described rectifier bridge Q pin 4 is connected 220V alternating current two ends respectively with rectifier bridge Q pin 2, and rectifier bridge Q pin 1 connects electric capacity C1 respectively, resistance R1, triode VT1 collector electrode and triode VT3 collector electrode, rectifier bridge Q pin 3 connects the electric capacity C1 other end respectively, electric capacity C2, resistance R2, diode D1 positive pole, resistance R5, electric capacity C3 and LED negative pole ground connection, the electric capacity C2 other end is the contact resistance R1 other end respectively, triode VT1 base stage, the resistance R2 other end, resistance R3 and triode VT2 collector electrode, triode VT2 emitter connects diode D1 negative pole, triode VT2 base stage connects potentiometer RP1 slide plate, described triode VT3 base stage connecting triode VT1 emitter, and triode VT3 emitter is the contact resistance R3 other end respectively, resistance R4, the electric capacity C3 other end and LED positive pole, the resistance R4 other end connects potentiometer RP1, potentiometer RP1 other end contact resistance R5.
As further program of the utility model: described electric capacity C1 is electrochemical capacitor.
As further program of the utility model: described electric capacity C2 is electrochemical capacitor.
As the utility model further scheme: described diode D1 is voltage stabilizing didoe.
Compared with prior art, the beneficial effects of the utility model are: the circuit components that the utility model LED drive circuit uses is few, and is all the conventional electronic components such as resistance, and price is very cheap, does not adopt chip component in addition, and antijamming capability is strong.
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 rectifier bridge Q, resistance R1, electric capacity C1, diode D1, triode VT1, triode VT2 and potentiometer RP1, rectifier bridge Q pin 4 is connected 220V alternating current two ends respectively with rectifier bridge Q pin 2, and rectifier bridge Q pin 1 connects electric capacity C1 respectively, resistance R1, triode VT1 collector electrode and triode VT3 collector electrode, rectifier bridge Q pin 3 connects the electric capacity C1 other end respectively, electric capacity C2, resistance R2, diode D1 positive pole, resistance R5, electric capacity C3 and LED negative pole ground connection, the electric capacity C2 other end is the contact resistance R1 other end respectively, triode VT1 base stage, the resistance R2 other end, resistance R3 and triode VT2 collector electrode, triode VT2 emitter connects diode D1 negative pole, and triode VT2 base stage connects potentiometer RP1 slide plate, triode VT3 base stage connecting triode VT1 emitter, and triode VT3 emitter is the contact resistance R3 other end respectively, resistance R4, the electric capacity C3 other end and LED positive pole, the resistance R4 other end connects potentiometer RP1, potentiometer RP1 other end contact resistance R5.
Electric capacity C1 is electrochemical capacitor.
Electric capacity C2 is electrochemical capacitor.
Diode D1 is voltage stabilizing didoe.
Operation principle of the present utility model is: refer to Fig. 1, 220V alternating current is through rectifier bridge Q rectification, again by the base stage being transported to the Darlington transistor be made up of triode VT1 and triode VT3 after electric capacity C1 filtering by resistance R1, again by the emitter output voltage of Darlington transistor, the voltage exported is transported to triode VT2 collector electrode through resistance R3, triode VT2 base stage is transported to again by resistance R4, triode VT2 base stage is high level, make triode VT2 conducting, electric current flows to the voltage stabilizing didoe D1 of triode VT2 emitter by triode VT2 collector electrode, LED is outputted to after diode D1 voltage stabilizing, LED is made to obtain stable driving voltage.
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 (4)
1. a LED drive circuit, comprises rectifier bridge Q, resistance R1, electric capacity C1, diode D1, triode VT1, triode VT2 and potentiometer RP1, is characterized in that, described rectifier bridge Q pin 4 is connected 220V alternating current two ends respectively with rectifier bridge Q pin 2, and rectifier bridge Q pin 1 connects electric capacity C1 respectively, resistance R1, triode VT1 collector electrode and triode VT3 collector electrode, rectifier bridge Q pin 3 connects the electric capacity C1 other end respectively, electric capacity C2, resistance R2, diode D1 positive pole, resistance R5, electric capacity C3 and LED negative pole ground connection, the electric capacity C2 other end is the contact resistance R1 other end respectively, triode VT1 base stage, the resistance R2 other end, resistance R3 and triode VT2 collector electrode, triode VT2 emitter connects diode D1 negative pole, triode VT2 base stage connects potentiometer RP1 slide plate, described triode VT3 base stage connecting triode VT1 emitter, and triode VT3 emitter is the contact resistance R3 other end respectively, resistance R4, the electric capacity C3 other end and LED positive pole, the resistance R4 other end connects potentiometer RP1, potentiometer RP1 other end contact resistance R5.
2. LED drive circuit according to claim 1, is characterized in that, described electric capacity C1 is electrochemical capacitor.
3. LED drive circuit according to claim 1, is characterized in that, described electric capacity C2 is electrochemical capacitor.
4. LED drive circuit according to claim 1, is characterized in that, described diode D1 is voltage stabilizing didoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520338982.5U CN204761759U (en) | 2015-05-25 | 2015-05-25 | LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520338982.5U CN204761759U (en) | 2015-05-25 | 2015-05-25 | LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204761759U true CN204761759U (en) | 2015-11-11 |
Family
ID=54476421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520338982.5U Expired - Fee Related CN204761759U (en) | 2015-05-25 | 2015-05-25 | LED drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204761759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301108A (en) * | 2016-08-30 | 2017-01-04 | 宁波贝德尔电讯电机有限公司 | The motor of a kind of fan band rectification function drives plate |
-
2015
- 2015-05-25 CN CN201520338982.5U patent/CN204761759U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301108A (en) * | 2016-08-30 | 2017-01-04 | 宁波贝德尔电讯电机有限公司 | The motor of a kind of fan band rectification function drives plate |
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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: 20151111 Termination date: 20170525 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |