CN205566722U - Low -power consumption LED drive circuit - Google Patents
Low -power consumption LED drive circuit Download PDFInfo
- Publication number
- CN205566722U CN205566722U CN201620178089.5U CN201620178089U CN205566722U CN 205566722 U CN205566722 U CN 205566722U CN 201620178089 U CN201620178089 U CN 201620178089U CN 205566722 U CN205566722 U CN 205566722U
- Authority
- CN
- China
- Prior art keywords
- drive circuit
- low
- power consumption
- led drive
- negative pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Led Devices (AREA)
Abstract
The utility model discloses a low -power consumption LED drive circuit, including resistance R1, R2, R3, electric capacity C1, C2, inductance L1, diode D1, D2, triode Q1, Q2, DC power supply positive pole, L1 are connected respectively to triode Q1 projecting pole, R1, C1 are connected respectively to the Q1 base, C1 is connected to R2 one end, and L1, Q2 collecting electrode, D1 positive pole are connected respectively to the other end, C2 positive pole, R3 are connected respectively to D2's negative pole, Q1's collecting electrode, R1 are connected respectively to Q2's base, DC power supply negative pole, C2 negative pole, D2 negative pole are connected respectively to Q2's projecting pole. The utility model discloses a drive circuit is simple, and operating voltage is low, and work efficiency is high, and output is stable.
Description
Technical field
This utility model relates to LED drive circuit, is specifically related to a kind of low-power consumption LED being operated under as little as 1.2V voltage
Drive circuit.
Background technology
No matter current LED drive circuit uses electric charge pump or inducer, and a lot of LED drivers can be by single-unit with double
Joint NiMH(ni-mh) the 3.6V voltage that needs to white light LEDs of 1.2V ~ 2.4V voltage increase of battery.But, these electricity most
Road (such as the MAX1595 of Maxim) needs the input voltage of minimum about 2.5V normally to work.The input electricity of MAX1595 work
Pressure is 2.4V, but the input voltage of deficiency about 3V does not ensures that suitably output.Additionally, there are when cell voltage drops to
During threshold level, output becomes erratic problem.
Summary of the invention
This utility model is for the problems referred to above, it is provided that a kind of low-power consumption LED drive circuit, including resistance R1, R2, R3, electricity
Hold C1, C2, inductance L1, diode D1, D2, audion Q1, Q2；Described audion Q1 emitter stage is just connecting DC source respectively
Pole, L1, described Q1 base stage connects R1, C1 respectively, and described R2 one end connects C1, and the other end is just connecting L1, Q2 colelctor electrode, D1 respectively
Pole；The negative pole of described D2 connects C2 positive pole, R3 respectively；The base stage of described Q2 connects the colelctor electrode of Q1, R1 respectively；Described Q2 sends out
Emitter-base bandgap grading connects DC power cathode, C2 negative pole, D2 negative pole respectively.
Further, described electric capacity C1 is the electric capacity C1 of 100 pico farads.
Further, described resistance R1 is the resistance R1 of 10 kilo-ohms.
Further, described electric capacity C2 is the electrochemical capacitor C2 of microhenry.
Further, described inductance L1 is the inductance L1 of 100uH.
Advantage of the present utility model:
Drive circuit of the present utility model is simple, and running voltage is low, and work efficiency is high, and output is stable.
In addition to objects, features and advantages described above, this utility model also has other purpose, feature and excellent
Point.Below with reference to figure, this utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing being further appreciated by of the present utility model, of the present utility model
Schematic description and description is used for explaining this utility model, is not intended that improper restriction of the present utility model.
Fig. 1 is the schematic diagram of this utility model embodiment.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain this
Utility model, is not used to limit this utility model.
With reference to Fig. 1, a kind of low-power consumption LED drive circuit as shown in Figure 1, including resistance R1, R2, R3, electric capacity C1, C2,
Inductance L1, diode D1, D2, audion Q1, Q2；Described audion Q1 emitter stage connects DC power anode, L1 respectively, described
Q1 base stage connects R1, C1 respectively, and described R2 one end connects C1, and the other end connects L1, Q2 colelctor electrode, D1 positive pole respectively；Described D2
Negative pole connect C2 positive pole, R3 respectively；The base stage of described Q2 connects the colelctor electrode of Q1, R1 respectively；The emitter stage of described Q2 is respectively
Connect DC power cathode, C2 negative pole, D2 negative pole.
Described electric capacity C1 is the electric capacity C1 of 100 pico farads.
Described resistance R1 is the resistance R1 of 10 kilo-ohms.
Described electric capacity C2 is the electrochemical capacitor C2 of microhenry.
Described inductance L1 is the inductance L1 of 100uH.
In described circuit, R1 provides a paths by the base-emitter of Q1 and Q2 for starting current.Q2 turns on, and therefore
Make Q1 turn on, quickly make two transistors enter saturated.But, C1 by R2 charge to cell voltage deduct Q1 base penetrate pressure drop and
The saturated set radio pressure of Q2, finally makes Q1 turn off, and has therefore been also switched off Q2.It follows that the positively biased that C1 is by R1 Yu R2 and Q2
Base-emitter discharges.The time constant of R2C1 determines ON time, and (R1+R2) (C2) determines the turn-off time.C2 is as working as Q2
Flow out the capacitive input filter of electric current during shutoff from L1, and the i.e. D2 of white light LEDs for a standard provides a substantially constant
Voltage.Output voltage is directly proportional to cell voltage.
In this circuit arrangement, transistor Q1 and Q2 constitutes the trigger of a 60KHz, can under the cell voltage of as little as 1V be
LED provides output electric current.
Drive circuit of the present utility model is simple, and running voltage is low, and work efficiency is high, and output is stable.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in guarantor of the present utility model
Within the scope of protecting.
Claims (5)
1. a low-power consumption LED drive circuit, it is characterised in that include resistance R1, R2, R3, electric capacity C1, C2, inductance L1, two poles
Pipe D1, D2, audion Q1, Q2；Described audion Q1 emitter stage connects DC power anode, L1 respectively, and described Q1 base stage is respectively
Connecting R1, C1, described R2 one end connects C1, and the other end connects L1, Q2 colelctor electrode, D1 positive pole respectively；The negative pole of described D2 is respectively
Connect C2 positive pole, R3；The base stage of described Q2 connects the colelctor electrode of Q1, R1 respectively；The emitter stage of described Q2 connects unidirectional current respectively
Source negative pole, C2 negative pole, D2 negative pole.
Low-power consumption LED drive circuit the most according to claim 1, it is characterised in that described electric capacity C1 is the electricity of 100 pico farads
Hold C1.
Low-power consumption LED drive circuit the most according to claim 1, it is characterised in that described resistance R1 is the electricity of 10 kilo-ohms
Resistance R1.
Low-power consumption LED drive circuit the most according to claim 1, it is characterised in that described electric capacity C2 is the electrolysis of microhenry
Electric capacity C2.
5. according to the arbitrary described low-power consumption LED drive circuit of claim 1-4, it is characterised in that described inductance L1 is 100uH
Inductance L1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620178089.5U CN205566722U (en) | 2016-03-09 | 2016-03-09 | Low -power consumption LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620178089.5U CN205566722U (en) | 2016-03-09 | 2016-03-09 | Low -power consumption LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205566722U true CN205566722U (en) | 2016-09-07 |
Family
ID=56817151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620178089.5U Expired - Fee Related CN205566722U (en) | 2016-03-09 | 2016-03-09 | Low -power consumption LED drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205566722U (en) |
-
2016
- 2016-03-09 CN CN201620178089.5U patent/CN205566722U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107769560B (en) | Adjustable switching power supply based on BUCK circuit | |
| CN104519633B (en) | A kind of under-voltage protecting circuit for LED lamp | |
| CN205566722U (en) | Low -power consumption LED drive circuit | |
| CN204993098U (en) | Computer adapter power | |
| CN204858268U (en) | Laser -driven ware | |
| CN206004528U (en) | A kind of high power booster circuit | |
| CN209497635U (en) | The positive and negative low-loss LED lamp driving circuit connect | |
| CN202602243U (en) | LED (Light-Emitting Diode) illumination power supply protection circuit | |
| CN106648010A (en) | Computer system safety power source | |
| CN202043331U (en) | LED (Light Emitting Diode) control device capable of automatically switching voltage | |
| CN104411047A (en) | Energy-saving power-amplifying-type grid driving system | |
| CN205882762U (en) | Power supply unit and portable electronic equipment | |
| CN203523105U (en) | Under-voltage protection circuit for LED lamp | |
| CN205830116U (en) | A kind of high-power LED light adjusting constant-current source | |
| CN104470105A (en) | Logic protection amplifying grid drive system based on bootstrap circuit | |
| CN204547902U (en) | A kind of back mirror steering indicating light constant current drived control circuit | |
| CN204465964U (en) | A kind of multi-channel LED drive circuit | |
| CN204795713U (en) | LED step -down voltage stabilizing circuit | |
| CN109152152B (en) | Low-power consumption control circuit | |
| CN204316789U (en) | A kind of self-locking optical excitation raster data model system based on power amplification | |
| CN205491268U (en) | Low pressure LED drive circuit | |
| CN206923077U (en) | A kind of new regulation LED current circuit | |
| CN218301704U (en) | LED intelligent power supply circuit | |
| CN207910501U (en) | A kind of novel lithium battery charged state intelligent measurement control circuit | |
| CN108170182A (en) | A kind of dual control thermosistor with upper and lower limit function |
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: 20160907 Termination date: 20190309 |