CN201830527U - High-power LED (light emitting diode) driving power supply - Google Patents
High-power LED (light emitting diode) driving power supply Download PDFInfo
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- CN201830527U CN201830527U CN2010205837541U CN201020583754U CN201830527U CN 201830527 U CN201830527 U CN 201830527U CN 2010205837541 U CN2010205837541 U CN 2010205837541U CN 201020583754 U CN201020583754 U CN 201020583754U CN 201830527 U CN201830527 U CN 201830527U
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Abstract
The utility model discloses a high-power LED (light emitting diode) driving power supply comprising an input rectification and filter circuit, a power factor correcting circuit, a power switching circuit, an output rectification and filter circuit and a PWM (Pulse-Width Modulation) master control circuit, wherein commercial power is converted to direct-current voltage through the input rectification and filter circuit, the power factor correcting circuit, the power switching circuit and the output rectification and filter circuit sequentially, and the PWM master control circuit is connected with the control ends of the power factor correcting circuit and the power switching circuit respectively. The driving power supply also comprises a feedback control circuit, wherein the input end of the feedback control circuit is connected with the output end of the output rectification and filter circuit, and the output end of the feedback control circuit is connected with the PWM master control circuit. The high-power LED driving power supply realizes multi-path constant current output by utilizing multi-path current feedback control circuit instead of the traditional DC-DC transformation link, and can avoid mutual interference of multi-path switch signals, thereby not only ensuring the reliability of the driving power supply, but also greatly saving the cost of the driving power supply. The driving power supply can be widely applied to the field of high-power LED illumination.
Description
Technical field
The utility model relates to mains lighting supply, especially a kind of great power LED power supply.
Background technology
Under current global energy environment in short supply, energy savings has become trend of the times.Great power LED has that the high and low power consumption of light efficiency, life-span are long, high, photochromic pure, the advantage such as fail safe good, controllability is strong of stability, just progressively replace light source in the past, beginning extensively applies to full color display, traffic lights, automobile lamp, background light source, Landscape Lighting, Special Work illumination etc., becomes the new generation of green light source of lighting field.
In order to bring into play the advantage of great power LED, driving power must satisfy a plurality of design considerations such as constant current output, heat radiation, efficient, power factor (PF), over-voltage and over-current overheat protector.Existing high-power LED driving power source adopts constant-current drive technology mostly, the driving power of the last hectowatt LED that occurs on the market adopts " PFC+LLC+DC-DC " though topological structure can obtain PF 〉=0.97 and η 〉=88% at an easy rate, but because the switching signal phase mutual interference in the multichannel DC-DC circuit, cause the circuit less stable and be difficult to test by EMI, and cost height, therefore needing a kind of variable connector signal of avoiding badly interferes with each other, the reliability height, the great power LED constant-current driving power supply that cost is low.
The utility model content
The technical problems to be solved in the utility model is: provide a kind of and can avoid that the variable connector signal interferes with each other, reliability height, high-power LED driving power source that cost is low.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted is:
High-power LED driving power source, comprise the input rectifying filter circuit, circuit of power factor correction, circuit for power conversion, output rectifier and filter and PWM governor circuit, civil power is successively through current rectifying and wave filtering circuit, circuit of power factor correction, circuit for power conversion, output rectifier and filter becomes direct voltage, described PWM governor circuit is connected with the control end of circuit of power factor correction and circuit for power conversion respectively, described high-power LED driving power source also comprises feedback control circuit, the feedback control circuit input is connected with the output of output rectifier and filter, and the output of feedback control circuit is connected with the PWM governor circuit.
Further, described feedback control circuit comprises sampling output unit, reference voltage unit, comparison circuit and multichannel NOR gate, the input of comparison circuit links to each other with the sampling output unit with reference voltage unit respectively, the output of comparison circuit links to each other with the input of multichannel NOR gate, and the output of multichannel NOR gate links to each other with the PWM governor circuit.
Further, described feedback control circuit comprises at least two branch current current-limiting control circuits, can drive two groups of above LED strings respectively, and described feedback control circuit also comprises output voltage feedback control circuit and total output current feedback control circuit.
Further, described Current Feedback Control circuit comprises operational amplifier, described operational amplifier normal phase input end links to each other with reference voltage unit, the inverting input of described operational amplifier also is connected to electric capacity (C54, C48, C51) and resistance (R62), electric capacity (C51) other end ground connection, resistance (R62) other end links to each other with the sampling output unit, electric capacity (C54) other end series resistor (R63), resistance (R63) other end links to each other with the output of operational amplifier, the other end of electric capacity (C48) links to each other with the output of operational amplifier, the output of operational amplifier also is connected with resistance (R71), the other end of resistance (R71) connects the negative electrode of diode (D19), and the anode of diode (D19) links to each other with the optical coupled switch input (FB) of PWM governor circuit.
The beneficial effects of the utility model are: utilize multichannel Current Feedback Control circuit to realize the multiple constant current output of LED driving power, substituted traditional DC-DC transform part, can avoid the variable connector signal to interfere with each other, not only guarantee the reliability of driving power, and greatly saved the cost of driving power.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
Fig. 1 is the utility model high-power LED driving power source hardware block diagram;
Fig. 2 is the utility model high-power LED driving power source PWM governor circuit circuit diagram;
Fig. 3 is the utility model high-power LED driving power source Current Feedback Control circuit figure.
Embodiment
With reference to Fig. 1 high-power LED driving power source, comprise input rectifying filter circuit 1, circuit of power factor correction 2, circuit for power conversion 3, output rectifier and filter 4 and PWM governor circuit 5, civil power is successively through current rectifying and wave filtering circuit 1, circuit of power factor correction 2, circuit for power conversion 3, output rectifier and filter 4 becomes direct voltage, described PWM governor circuit 5 is connected with the control end of circuit of power factor correction 2 with circuit for power conversion 3 respectively, described high-power LED driving power source also comprises feedback control circuit 6, feedback control circuit 6 inputs are connected with the output of output rectifier and filter 4, and the output of feedback control circuit 6 is connected with PWM governor circuit 5.
Further, described feedback control circuit 6 comprises sampling output unit, reference voltage unit, comparison circuit and multichannel NOR gate, the input of comparison circuit links to each other with the sampling output unit with reference voltage unit respectively, the output of comparison circuit links to each other with the input of multichannel NOR gate, and the output of multichannel NOR gate links to each other with PWM governor circuit 5.With reference to Fig. 2, described PWM governor circuit 5 adopts PLC810PG.
Further, described feedback control circuit 6 comprises at least two branch current current-limiting control circuits, can drive two groups of above LED strings respectively, and described feedback control circuit also comprises output voltage feedback control circuit and total output current feedback control circuit.
Further, with reference to Fig. 3, described Current Feedback Control circuit comprises operational amplifier, described operational amplifier normal phase input end links to each other with reference voltage unit, the inverting input of described operational amplifier also is connected to capacitor C 54, C48, C51 and resistance R 62, capacitor C 51 other end ground connection, resistance R 62 other ends link to each other with the sampling output unit, capacitor C 54 other end series resistor R63, resistance R 63 other ends link to each other with the output of operational amplifier, the other end of capacitor C 48 links to each other with the output of operational amplifier, the output of operational amplifier also is connected with resistance R 71, the other end of resistance R 71 connects the negative electrode of diode D19, and the anode of diode D19 links to each other with the optical coupled switch input FB of PWM governor circuit.When output current surpassed reference value, the operational amplifier output voltage became low level by high level, and low level can drive the optical coupled switch conducting, and the optocoupler signal feedback is to control chip PLC810PG, and the MOSFET that can close LLC drives output.
Described high-power LED driving power source constitutes NOR gate by the multichannel feedback control circuit, in conjunction with the PWM governor circuit, adjust the resonance frequency frequency of LLC, realize the multiple constant current or the current limliting output of driving power, replaced the technical scheme that traditional DC-DC realizes multiple constant current output.
More than be that preferable enforcement of the present utility model is specified, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite of the utility model spirit, distortion that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (4)
1. high-power LED driving power source, comprise input rectifying filter circuit (1), circuit of power factor correction (2), circuit for power conversion (3), output rectifier and filter (4) and PWM governor circuit (5), civil power is successively through current rectifying and wave filtering circuit (1), circuit of power factor correction (2), circuit for power conversion (3), output rectifier and filter (4) becomes direct voltage, described PWM governor circuit (5) is connected with the control end of circuit of power factor correction (2) with circuit for power conversion (3) respectively, it is characterized in that: also comprise feedback control circuit (6), feedback control circuit (6) input is connected with the output of output rectifier and filter (4), and the output of feedback control circuit (6) is connected with PWM governor circuit (5).
2. high-power LED driving power source according to claim 1, it is characterized in that: described feedback control circuit (6) comprises sampling output unit, reference voltage unit, comparison circuit and multichannel NOR gate, the input of comparison circuit links to each other with the sampling output unit with reference voltage unit respectively, the output of comparison circuit links to each other with the input of multichannel NOR gate, and the output of multichannel NOR gate links to each other with PWM governor circuit (5).
3. high-power LED driving power source according to claim 2, it is characterized in that: described feedback control circuit (6) comprises at least two branch current current-limiting control circuits of driving LED string respectively, and described feedback control circuit also comprises output voltage feedback control circuit and total output current feedback control circuit.
4. high-power LED driving power source according to claim 2, it is characterized in that: described Current Feedback Control circuit comprises operational amplifier, described operational amplifier normal phase input end links to each other with reference voltage unit, the inverting input of described operational amplifier also is connected to capacitor C 54, C48, C51 and resistance R 62, capacitor C 51 other end ground connection, resistance R 62 other ends link to each other with the sampling output unit, capacitor C 54 other end series resistor R63, resistance R 63 other ends link to each other with the output of operational amplifier, the other end of capacitor C 48 links to each other with the output of operational amplifier, the output of operational amplifier also is connected with resistance R 71, the other end of resistance R 71 connects the negative electrode of diode D19, and the anode of diode D19 links to each other with the optical coupled switch input (FB) of PWM governor circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205837541U CN201830527U (en) | 2010-10-30 | 2010-10-30 | High-power LED (light emitting diode) driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205837541U CN201830527U (en) | 2010-10-30 | 2010-10-30 | High-power LED (light emitting diode) driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201830527U true CN201830527U (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205837541U Expired - Fee Related CN201830527U (en) | 2010-10-30 | 2010-10-30 | High-power LED (light emitting diode) driving power supply |
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| CN (1) | CN201830527U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969727A (en) * | 2010-10-30 | 2011-02-09 | 陈金明 | High power LED driving power supply |
| CN102612232A (en) * | 2012-03-23 | 2012-07-25 | 上海信耀电子有限公司 | Driving control system with multiple LED (light emitting diode) loads for automobile |
| CN103517495A (en) * | 2012-06-21 | 2014-01-15 | 天津工大海宇照明部品有限公司 | High-power LED street lamp driving power supply |
-
2010
- 2010-10-30 CN CN2010205837541U patent/CN201830527U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969727A (en) * | 2010-10-30 | 2011-02-09 | 陈金明 | High power LED driving power supply |
| CN101969727B (en) * | 2010-10-30 | 2014-06-04 | 陈金明 | High power LED driving power supply |
| CN102612232A (en) * | 2012-03-23 | 2012-07-25 | 上海信耀电子有限公司 | Driving control system with multiple LED (light emitting diode) loads for automobile |
| CN102612232B (en) * | 2012-03-23 | 2014-11-05 | 上海信耀电子有限公司 | Driving control system with multiple LED (light emitting diode) loads for automobile |
| CN103517495A (en) * | 2012-06-21 | 2014-01-15 | 天津工大海宇照明部品有限公司 | High-power LED street lamp driving power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20121030 |