CN203206508U - Novel LED lamp driving circuit - Google Patents
Novel LED lamp driving circuit Download PDFInfo
- Publication number
- CN203206508U CN203206508U CN 201320138259 CN201320138259U CN203206508U CN 203206508 U CN203206508 U CN 203206508U CN 201320138259 CN201320138259 CN 201320138259 CN 201320138259 U CN201320138259 U CN 201320138259U CN 203206508 U CN203206508 U CN 203206508U
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- drive circuit
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Abstract
The utility model relates to a driving circuit and provides a novel LED lamp driving circuit which has the advantages of simple structure, high quality and reliability, long life and good stability. The driving circuit comprises an EMI filtering and rectification circuit, an active power factor correction circuit, a half-bridge driving circuit, a high-frequency oscillation circuit, a current and voltage protective circuit, an LED constant current circuit and an LED lamp set. An output terminal of the high-frequency oscillation circuit is connected with an input terminal of the half-bridge driving circuit. An output terminal of the half-bridge driving circuit passes by the LED constant current circuit and is connected with the LED lamp set. The driving circuit also comprises an initial-voltage adjustment circuit and a sampling feedback circuit. An input terminal of the sampling feedback circuit is connected with the output terminal of the half-bridge driving circuit. An output terminal of the sampling feedback circuit is connected with the initial-voltage adjustment circuit. An output terminal of the initial-voltage adjustment circuit is connected with a control input terminal of the high-frequency oscillation circuit.
Description
Technical field
The utility model relates to drive circuit, particularly a kind of Novel LED light drive circuit.
Background technology
Improve along with the light efficiency characteristic of LED lamp is lasting, the application that led light source enters lighting field has been trend of the times.Operating voltage and electric current are non-linear relation in the existing LED lamp, and the operating voltage of LED lamp is discreteness simultaneously, thereby so that in actual use, must precisely control the LED operating current, otherwise will cause the damage of LED lamp.China Patent No.: 200920061903.5, a kind of power driving circuit of LED lamp is disclosed, comprise filter circuit, rectification circuit, reduction voltage circuit, it is characterized in that the input of mains supply is through filter circuit, connect the integrated circuit that model is L6562 behind the rectification circuit, this integrated circuit, switching tube, high frequency transformer consists of described reduction voltage circuit, wherein driven the primary coil of described switching tube and described high frequency transformer by the ic output that produces the pulse-width signal drive waveforms, the voltage of the low pressure output secondary coil of high frequency coil is through rectification, the backward LED light-emitting diode of filtering provides DC power supply, but it still exists efficient low, life-span is short, the problem that reliability is not high.
Summary of the invention
Therefore, for above-mentioned problem, the utility model proposes that a kind of simple in structure, high-quality, high reliability, life-span are long, the Novel LED light drive circuit of good stability.
For solving this technical problem; the utility model is taked following scheme: the Novel LED light drive circuit; comprise EMI filtering and rectification circuit; APFC; half-bridge drive circuit; high-frequency oscillating circuits; the current/voltage protective circuit; LED constant-current circuit and LED lamp group; described EMI filtering and rectification circuit output end are connected with the APFC input; described APFC output is connected with the half-bridge drive circuit power end with the high-frequency oscillating circuits power end respectively provides power supply for it; described high-frequency oscillating circuits output is connected with the half-bridge drive circuit input; described half-bridge drive circuit output is connected with LED lamp group through the LED constant-current circuit; described half-bridge drive circuit output is connected with the current/voltage protective circuit; described current/voltage protective circuit also is connected with high-frequency oscillating circuits; also comprise starting voltage regulating circuit and sampling feedback circuit; described sampling feedback circuit input is connected with the half-bridge drive circuit output; described sampling feedback circuit output is connected with the starting voltage regulating circuit, and described starting voltage regulating circuit output is connected with the control input end of high-frequency oscillating circuits.
Further, described high-frequency oscillating circuits is made of pwm control circuit integrated chip and vibration timer.
Further, described current/voltage protective circuit comprises overvoltage crowbar, current foldback circuit and delay circuit.
By adopting the aforementioned techniques scheme, the beneficial effects of the utility model are: the voltage of regulating the control led drive circuit by the starting voltage regulating circuit, so that LED lamp group directly enters stable initialization state, simple in structure, quality and the reliability of led drive circuit have been improved, so that prolong the useful life of LED lamp group.
Description of drawings
Fig. 1 is the theory diagram of the utility model embodiment.
Embodiment
Now with embodiment the utility model is further specified by reference to the accompanying drawings.
With reference to figure 1; the utility model discloses a kind of Novel LED light drive circuit; comprise EMI filtering and rectification circuit 1; APFC 2; half-bridge drive circuit 3; high-frequency oscillating circuits 4; current/voltage protective circuit 5; LED constant-current circuit 6; LED lamp group 7; sampling feedback circuit 8 and starting voltage regulating circuit 9; described high-frequency oscillating circuits 4 is made of pwm control circuit integrated chip and vibration timer; described EMI filtering and rectification circuit output end 1 are connected with APFC 2 inputs; described APFC 2 outputs respectively with high-frequency oscillating circuits 4 power ends; half-bridge drive circuit 3 is connected with starting voltage regulating circuit 9 power ends provides power supply for it; described high-frequency oscillating circuits 4 outputs are connected with half-bridge drive circuit 3 inputs; described half-bridge drive circuit 3 outputs are connected with LED lamp group 7 through LED constant-current circuit 6; described half-bridge drive circuit 3 outputs are connected with current/voltage protective circuit 5; described current/voltage protective circuit 5 also is connected with high-frequency oscillating circuits 4; described sampling feedback circuit 9 inputs are connected with half-bridge drive circuit 3 outputs; described sampling feedback circuit 8 outputs are connected with starting voltage regulating circuit 9; described starting voltage regulating circuit 9 outputs are connected with the control input end of high-frequency oscillating circuits 4, and described current/voltage protective circuit 5 comprises overvoltage crowbar; current foldback circuit and delay circuit.
The utility model is regulated the voltage of control led drive circuit by the starting voltage regulating circuit, so that LED lamp group directly enters stable initialization state, simple in structure, improved quality and the reliability of led drive circuit, so that prolong the useful life of LED lamp group.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (3)
1. Novel LED light drive circuit; comprise EMI filtering and rectification circuit; APFC; half-bridge drive circuit; high-frequency oscillating circuits; the current/voltage protective circuit; LED constant-current circuit and LED lamp group; described EMI filtering and rectification circuit output end are connected with the APFC input; described APFC output is connected with the half-bridge drive circuit power end with the high-frequency oscillating circuits power end respectively provides power supply for it; described high-frequency oscillating circuits output is connected with the half-bridge drive circuit input; described half-bridge drive circuit output is connected with LED lamp group through the LED constant-current circuit; described half-bridge drive circuit output is connected with the current/voltage protective circuit; described current/voltage protective circuit also is connected with high-frequency oscillating circuits; it is characterized in that: also comprise starting voltage regulating circuit and sampling feedback circuit; described sampling feedback circuit input is connected with the half-bridge drive circuit output; described sampling feedback circuit output is connected with the starting voltage regulating circuit, and described starting voltage regulating circuit output is connected with the control input end of high-frequency oscillating circuits.
2. Novel LED light drive circuit according to claim 1 is characterized in that: described high-frequency oscillating circuits is made of pwm control circuit integrated chip and vibration timer.
3. Novel LED light drive circuit according to claim 1, it is characterized in that: described current/voltage protective circuit comprises overvoltage crowbar, current foldback circuit and delay circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320138259 CN203206508U (en) | 2013-03-25 | 2013-03-25 | Novel LED lamp driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320138259 CN203206508U (en) | 2013-03-25 | 2013-03-25 | Novel LED lamp driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203206508U true CN203206508U (en) | 2013-09-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320138259 Expired - Fee Related CN203206508U (en) | 2013-03-25 | 2013-03-25 | Novel LED lamp driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203206508U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104853509A (en) * | 2014-11-26 | 2015-08-19 | 成都冠深科技有限公司 | Phase shift type LED driving system based on capacitance feedback three-point type oscillation circuit |
| CN104853507A (en) * | 2014-11-26 | 2015-08-19 | 成都冠深科技有限公司 | Bootstrap control LED driving system based on capacitance feedback three-point type oscillation circuit |
| CN104869729A (en) * | 2014-11-26 | 2015-08-26 | 成都冠深科技有限公司 | Broad-pulse triggering lowpass filtering LED voltage stabilizing system based on phase processing |
| WO2015192576A1 (en) * | 2014-06-19 | 2015-12-23 | 欧普照明股份有限公司 | Led drive power start-up circuit and start-up method |
| CN105451391A (en) * | 2015-12-17 | 2016-03-30 | 盐城工学院 | LED driving circuit and lamp |
-
2013
- 2013-03-25 CN CN 201320138259 patent/CN203206508U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015192576A1 (en) * | 2014-06-19 | 2015-12-23 | 欧普照明股份有限公司 | Led drive power start-up circuit and start-up method |
| CN104853509A (en) * | 2014-11-26 | 2015-08-19 | 成都冠深科技有限公司 | Phase shift type LED driving system based on capacitance feedback three-point type oscillation circuit |
| CN104853507A (en) * | 2014-11-26 | 2015-08-19 | 成都冠深科技有限公司 | Bootstrap control LED driving system based on capacitance feedback three-point type oscillation circuit |
| CN104869729A (en) * | 2014-11-26 | 2015-08-26 | 成都冠深科技有限公司 | Broad-pulse triggering lowpass filtering LED voltage stabilizing system based on phase processing |
| CN105451391A (en) * | 2015-12-17 | 2016-03-30 | 盐城工学院 | LED driving circuit and lamp |
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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: 20130918 Termination date: 20180325 |