CN205491268U - Low pressure LED drive circuit - Google Patents
Low pressure LED drive circuit Download PDFInfo
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- CN205491268U CN205491268U CN201521108152.XU CN201521108152U CN205491268U CN 205491268 U CN205491268 U CN 205491268U CN 201521108152 U CN201521108152 U CN 201521108152U CN 205491268 U CN205491268 U CN 205491268U
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- inductance
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Abstract
The utility model discloses a low pressure LED drive circuit, including MOS pipe V1, inductance L1, power E and LED lamp H, power E's the anodal source electrode of connecting inductance L1 and MOS pipe V1, MOS pipe V1's drain electrode connecting resistance R1 and triode V2's base, inductance L1 and resistance R1's the other end, inductance L1's other end connecting resistance R2, diode D1's positive pole and triode V2's collecting electrode is connected to MOS pipe V1's grid. The utility model discloses LED drive circuit simple structure, components and parts are few, no chip structure, and interference immunity is stronger, adopts the mode of transistor and electric capacity, inductance combination charge -discharge, and improved circuit's driving force reaches the purpose with little voltage driving LED lamp, so has convenient to use, with low costs and small advantage.
Description
Technical field
This utility model relates to a kind of LED drive circuit, specifically a kind of low-voltage LED drive circuit.
Background technology
Along with the negative effect caused by Global Greenhouse Effect constantly manifests, in the world every country all using energy-saving and emission-reduction as the major issue that be must take in native economic development, the emerging power-saving technology that LED lighting engineering is arisen at the historic moment just under this background.Modal a kind of control light fixture during wherein light-operated LED (liquid crystal diode) lamp is daily life, it is commonly used for street lamp, corridor lamp and night-light, have automatically control, the advantage of saves energy, but LED be likely to occur in the environment of voltage is relatively low cannot start work and because of under-voltage inside is burnt situation, but at some Code in Hazardous Special Locations, in order to increase integrated level, it is impossible to use high capacity cell to power, therefore hinder it and promote and use.
Utility model content
The purpose of this utility model is to provide a kind of low-voltage LED drive circuit, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the following technical scheme of this utility model offer:
nullA kind of low-voltage LED drive circuit，Including metal-oxide-semiconductor V1、Inductance L1、Power supply E and LED H，The positive pole of described power supply E connects inductance L1 and the source electrode of metal-oxide-semiconductor V1，The drain electrode of metal-oxide-semiconductor V1 connects resistance R1 and the base stage of audion V2，The grid of metal-oxide-semiconductor V1 connects inductance L1 and the other end of resistance R1，The other end of inductance L1 connects resistance R2、The anode of diode D1 and the colelctor electrode of audion V2，The other end of electric capacity C1 connects the other end of resistance R2，The negative electrode of diode D1 connects electric capacity C2、The fixing end of of potentiometer RP1 and the sliding end of potentiometer RP1，Another fixing end of potentiometer RP1 connects LED H，The emitter stage of the negative pole connecting triode V2 of power supply E、The other end of electric capacity C2 and the other end of LED H.
As preferred version of the present utility model: the model of described audion V2 is 2N2222.
Compared with prior art, the beneficial effects of the utility model are: this utility model LED drive circuit structure is simple, components and parts are few, chipless structure, anti-interference is stronger, transistor and electric capacity, inductance is used to combine the mode of discharge and recharge, improve the driving force of circuit, reach to drive with small voltage the purpose of LED, therefore there is easy to use, low cost and the little advantage of volume.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of low-voltage LED drive circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
nullRefer to Fig. 1，A kind of low-voltage LED drive circuit，Including metal-oxide-semiconductor V1、Inductance L1、Power supply E and LED H，The positive pole of described power supply E connects inductance L1 and the source electrode of metal-oxide-semiconductor V1，The drain electrode of metal-oxide-semiconductor V1 connects resistance R1 and the base stage of audion V2，The grid of metal-oxide-semiconductor V1 connects inductance L1 and the other end of resistance R1，The other end of inductance L1 connects resistance R2、The anode of diode D1 and the colelctor electrode of audion V2，The other end of electric capacity C1 connects the other end of resistance R2，The negative electrode of diode D1 connects electric capacity C2、The fixing end of of potentiometer RP1 and the sliding end of potentiometer RP1，Another fixing end of potentiometer RP1 connects LED H，The emitter stage of the negative pole connecting triode V2 of power supply E、The other end of electric capacity C2 and the other end of LED H.
The model of audion V2 is 2N2222.
Operation principle of the present utility model is: the resistance R1 in circuit provides a paths by the base-emitter of metal-oxide-semiconductor V1 and audion V2 for starting current.So that audion V2 conducting, and therefore make metal-oxide-semiconductor V1 turn on, quickly make two audions enter saturation.But, electric capacity C1 charges to cell voltage by resistance R2 and deducts metal-oxide-semiconductor V1 base and penetrate the saturated set radio pressure of pressure drop and audion V2, finally makes metal-oxide-semiconductor V1 turn off, and has therefore been also switched off audion V2.It follows that electric capacity C1 is discharged by the positively biased base-emitter of resistance R1 and resistance R2 and audion V2.The time constant of resistance R2 and electric capacity C1 determines ON time, and electricity R1, resistance R2 and electric capacity C2 determines the turn-off time.Electric capacity C2 as when audion V2 turns off from L1 flow out electric current capacitive input filter, and for LED H provide a constant voltage.Output voltage is directly proportional to supply voltage, thus reaches to drive under low voltage environment the purpose of LED.Circuit structure is simple, components and parts are few, chipless structure, and anti-interference is stronger, transistor and electric capacity, inductance is used to combine the mode of discharge and recharge, improve the driving force of circuit, reach to drive with small voltage the purpose of LED, therefore there is easy to use, low cost and the little advantage of volume.
Claims (2)
- null1. a low-voltage LED drive circuit，Including metal-oxide-semiconductor V1、Inductance L1、Power supply E and LED H，It is characterized in that，The positive pole of described power supply E connects inductance L1 and the source electrode of metal-oxide-semiconductor V1，The drain electrode of metal-oxide-semiconductor V1 connects resistance R1 and the base stage of audion V2，The grid of metal-oxide-semiconductor V1 connects inductance L1 and the other end of resistance R1，The other end of inductance L1 connects resistance R2、The anode of diode D1 and the colelctor electrode of audion V2，The other end of electric capacity C1 connects the other end of resistance R2，The negative electrode of diode D1 connects electric capacity C2、The fixing end of of potentiometer RP1 and the sliding end of potentiometer RP1，Another fixing end of potentiometer RP1 connects LED H，The emitter stage of the negative pole connecting triode V2 of power supply E、The other end of electric capacity C2 and the other end of LED H.
- 2. according to a kind of low-voltage LED drive circuit described in claim 1, it is characterised in that the model of described audion V2 is 2N2222.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108152.XU CN205491268U (en) | 2015-12-29 | 2015-12-29 | Low pressure LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108152.XU CN205491268U (en) | 2015-12-29 | 2015-12-29 | Low pressure LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205491268U true CN205491268U (en) | 2016-08-17 |
Family
ID=56661606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521108152.XU Expired - Fee Related CN205491268U (en) | 2015-12-29 | 2015-12-29 | Low pressure LED drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205491268U (en) |
-
2015
- 2015-12-29 CN CN201521108152.XU patent/CN205491268U/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: 20160817 Termination date: 20171229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |