CN204652739U - A kind of LED power circuit - Google Patents
A kind of LED power circuit Download PDFInfo
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- CN204652739U CN204652739U CN201520320994.5U CN201520320994U CN204652739U CN 204652739 U CN204652739 U CN 204652739U CN 201520320994 U CN201520320994 U CN 201520320994U CN 204652739 U CN204652739 U CN 204652739U
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Abstract
The utility model discloses a kind of LED power circuit, comprise resistance R1, electric capacity C2, diode D2 and triode VT1, one end of described resistance R1 connects electric capacity C1 and resistance R2, the other end connecting valve S1 of resistance R2, the other end of switch S 1 connects 220V alternating current, and the other end of resistance R1 connects the anode of diode D1, the other end of electric capacity C1 and the negative electrode of diode D3.Transformer abandoned by the utility model power circuit, only adopt output loading tandem type circuit structure, so the total current demand of circuit can be reduced, resistance-capacitance depressurization electric capacity uses less capacity just can the more load of drive ratio, therefore have that circuit structure is simple, easy to use, stable performance and useful life longer advantage.
Description
Technical field
The utility model relates to a kind of power supply, specifically a kind of LED power circuit.
Background technology
LED is acknowledged as green forth generation light source, is a kind of solid cold light source, has the plurality of advantages such as efficient, life-span length, safety and environmental protection, volume are little, high reliability, fast response time.Reach same illuminating effect at present, the power consumption of LED is approximately 1/10 of incandescent lamp, 1/2 of fluorescent lamp, LED power circuit is concerning most important LED, LED power conventional mostly at present is transformer pressure-reducing structure, not only volume is large, cost is high, and the easy short circuit of transformer coil, affects the normal use of LED lamp.
Utility model content
The purpose of this utility model is to provide that a kind of structure is simple, the LED power circuit of good stability, 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 circuit, comprises resistance R1, electric capacity C2, one end of diode D2 and triode VT1, described resistance R1 connects the other end connecting valve S1 of electric capacity C1 and resistance R2, resistance R2, and the other end of switch S 1 connects 220V alternating current, and the other end of resistance R1 connects the anode of diode D1, the other end of electric capacity C1 and the negative electrode of diode D3, the negative electrode of diode D1 connects electric capacity C2, the negative electrode of diode D2, the negative electrode of diode D5 and the anode of diode D6, the anode of diode D2 connects the negative electrode of diode D4 and the other end of 220V alternating current, and the anode of diode D3 connects the anode of diode D4, the other end of electric capacity C2, electric capacity C3, electric capacity C5, electric capacity C6, light fixture H, the anode of resistance R6 and three end adjustable shunt reference source IC, the anode of diode D5 connects the other end of electric capacity C3, the drain electrode of electric capacity C4 and metal-oxide-semiconductor Q1, the other end of negative electrode connection electric capacity C4 of diode D6 and the other end of resistance R3, resistance R3 connect the negative electrode of three end adjustable shunt reference source IC, the grid of metal-oxide-semiconductor Q1 and the collector electrode of triode VT1, the base stage contact resistance R4 of triode VT1 and the source electrode of metal-oxide-semiconductor Q1, the other end contact resistance R5 of resistance R4, the other end of electric capacity C6, a stiff end of potentiometer RP1 and the emitter of triode VT1, the reference of three end adjustable shunt reference source IC and the other end of connection electric capacity C5, the other end of resistance R5 and the other end of resistance R6, another stiff end of potentiometer RP1 connects the sliding end of potentiometer RP1 and the other end of light fixture H.
As preferred version of the present utility model: the model of described three end adjustable shunt reference source IC is TL431.
As preferred version of the present utility model: described light fixture H is LED electricity-saving lamp.
Compared with prior art, the beneficial effects of the utility model are: transformer abandoned by the utility model power circuit, only adopt output loading tandem type circuit structure, so the total current demand of circuit can be reduced, resistance-capacitance depressurization electric capacity uses less capacity just can the more load of drive ratio, therefore have that circuit structure is simple, easy to use, stable performance and useful life longer advantage.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of LED power 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, a kind of LED power circuit, comprises resistance R1, electric capacity C2, one end of diode D2 and triode VT1, described resistance R1 connects the other end connecting valve S1 of electric capacity C1 and resistance R2, resistance R2, and the other end of switch S 1 connects 220V alternating current, and the other end of resistance R1 connects the anode of diode D1, the other end of electric capacity C1 and the negative electrode of diode D3, the negative electrode of diode D1 connects electric capacity C2, the negative electrode of diode D2, the negative electrode of diode D5 and the anode of diode D6, the anode of diode D2 connects the negative electrode of diode D4 and the other end of 220V alternating current, and the anode of diode D3 connects the anode of diode D4, the other end of electric capacity C2, electric capacity C3, electric capacity C5, electric capacity C6, light fixture H, the anode of resistance R6 and three end adjustable shunt reference source IC, the anode of diode D5 connects the other end of electric capacity C3, the drain electrode of electric capacity C4 and metal-oxide-semiconductor Q1, the other end of negative electrode connection electric capacity C4 of diode D6 and the other end of resistance R3, resistance R3 connect the negative electrode of three end adjustable shunt reference source IC, the grid of metal-oxide-semiconductor Q1 and the collector electrode of triode VT1, the base stage contact resistance R4 of triode VT1 and the source electrode of metal-oxide-semiconductor Q1, the other end contact resistance R5 of resistance R4, the other end of electric capacity C6, a stiff end of potentiometer RP1 and the emitter of triode VT1, the reference of three end adjustable shunt reference source IC and the other end of connection electric capacity C5, the other end of resistance R5 and the other end of resistance R6, another stiff end of potentiometer RP1 connects the sliding end of potentiometer RP1 and the other end of light fixture H.
The model of three end adjustable shunt reference source IC is TL431.Light fixture H is LED electricity-saving lamp.
Operation principle of the present utility model is: in the utility model, rectification reduction voltage circuit comprises resistance R1 and R2, diode D1, D2, D3 and D4, electric capacity C1; Rectification reduction voltage circuit is connected after the alternating current 220V voltage step-down process of input with voltage stabilizing circuit.Voltage stabilizing circuit comprises resistance R3, R4, R5 and R6, diode D5 and D6, electric capacity C2, C3, C4, C5 and C6, triode VS, triode VT and three section of adjustable shunt reference source IC.220V alternating current powers to after step-down rectifying circuit and voltage stabilizing circuit load LED lamp tool, and the brightness of LED lamp regulates by potentiometer RP1 is convenient.Circuit has abandoned transformer, only adopt output loading tandem type circuit structure, so the total current demand of circuit can be reduced, resistance-capacitance depressurization electric capacity uses less capacity just can the more load of drive ratio, therefore have that circuit structure is simple, easy to use, stable performance and useful life longer advantage.
Claims (3)
1. a LED power circuit, comprises resistance R1, electric capacity C2, diode D2 and triode VT1, is characterized in that, one end of described resistance R1 connects the other end connecting valve S1 of electric capacity C1 and resistance R2, resistance R2, and the other end of switch S 1 connects 220V alternating current, and the other end of resistance R1 connects the anode of diode D1, the other end of electric capacity C1 and the negative electrode of diode D3, the negative electrode of diode D1 connects electric capacity C2, the negative electrode of diode D2, the negative electrode of diode D5 and the anode of diode D6, the anode of diode D2 connects the negative electrode of diode D4 and the other end of 220V alternating current, and the anode of diode D3 connects the anode of diode D4, the other end of electric capacity C2, electric capacity C3, electric capacity C5, electric capacity C6, light fixture H, the anode of resistance R6 and three end adjustable shunt reference source IC, the anode of diode D5 connects the other end of electric capacity C3, the drain electrode of electric capacity C4 and metal-oxide-semiconductor Q1, the other end of negative electrode connection electric capacity C4 of diode D6 and the other end of resistance R3, resistance R3 connect the negative electrode of three end adjustable shunt reference source IC, the grid of metal-oxide-semiconductor Q1 and the collector electrode of triode VT1, the base stage contact resistance R4 of triode VT1 and the source electrode of metal-oxide-semiconductor Q1, the other end contact resistance R5 of resistance R4, the other end of electric capacity C6, a stiff end of potentiometer RP1 and the emitter of triode VT1, the reference of three end adjustable shunt reference source IC and the other end of connection electric capacity C5, the other end of resistance R5 and the other end of resistance R6, another stiff end of potentiometer RP1 connects the sliding end of potentiometer RP1 and the other end of light fixture H.
2. a kind of LED power circuit according to claim 1, is characterized in that, the model of described three end adjustable shunt reference source IC is TL431.
3. a kind of LED power circuit according to claim 1, is characterized in that, described light fixture H is LED electricity-saving lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520320994.5U CN204652739U (en) | 2015-05-19 | 2015-05-19 | A kind of LED power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520320994.5U CN204652739U (en) | 2015-05-19 | 2015-05-19 | A kind of LED power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204652739U true CN204652739U (en) | 2015-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520320994.5U Expired - Fee Related CN204652739U (en) | 2015-05-19 | 2015-05-19 | A kind of LED power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204652739U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105813256A (en) * | 2016-03-08 | 2016-07-27 | 何小平 | LED street lamp lighting controller |
| CN106026648A (en) * | 2016-06-14 | 2016-10-12 | 四川福豆科技有限公司 | Server based on educational resource sharing system |
-
2015
- 2015-05-19 CN CN201520320994.5U patent/CN204652739U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105813256A (en) * | 2016-03-08 | 2016-07-27 | 何小平 | LED street lamp lighting controller |
| CN106026648A (en) * | 2016-06-14 | 2016-10-12 | 四川福豆科技有限公司 | Server based on educational resource sharing 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: 20150916 Termination date: 20160519 |