CN201830505U - Low-power LED driving power supply - Google Patents
Low-power LED driving power supply Download PDFInfo
- Publication number
- CN201830505U CN201830505U CN2010205127805U CN201020512780U CN201830505U CN 201830505 U CN201830505 U CN 201830505U CN 2010205127805 U CN2010205127805 U CN 2010205127805U CN 201020512780 U CN201020512780 U CN 201020512780U CN 201830505 U CN201830505 U CN 201830505U
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- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 10
- 240000002853 Nelumbo nucifera Species 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 abstract 2
- 238000005286 illumination Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model relates to a low-power LED driving power supply, and relates to the field of electrical lighting, which aims to solve the technical problems that the traditional LED lighting power has short service life, low electric energy conversion efficiency, complex structure, large size and the like. The input end of the power supply of the utility model is connected with a rectifier filter circuit (1), the rectifier filter circuit (1) is connected with a power factor circuit (4) and a transformer (6), the output end of the transformer (6) is connected with the output end of the power supply. An integrated operational amplifier (5) is connected between the output end of the transformer (6) and one end of an optical coupler (2) in a bridging way, the other end of the optical coupler (2) is connected with the power factor circuit (4), and the integrated operational amplifier (5) and a voltage-stabilizing circuit (7) are connected in parallel. The utility model is suitable for the manufacture of the low-power LED driving power supply.
Description
Technical field
The utility model relates to the electrical lighting field, particularly a kind of LED illumination driving power that is used for 18W, and as the LED fluorescent lamp, LED Landscape Lamp etc.
Background technology
According to internal authority personage prediction, it is the novel illumination light source epoch of representative that 21st century will enter with LED.Be called as the 4th generation light source.The LED semiconductor lighting has than the energy-conservation characteristics more than 80% of traditional energy-saving lamp, can substitute existing public lighting and home lighting comprehensively, if the LED product is used in the whole nation 80% illumination, can save power station, the Three Gorges energy output in 1 year, 84,700,000,000 degree every year.Market scale will reach more than 5 trillion yuan.
And at present common on the market LED illuminating lamp is still continued to use traditional design substantially owing to power unit, and there are the following problems with not enough:
1. life of product is short;
2. energy conversion efficiency is low, the power consumption height;
3. complex structure, integral product volume are big.
Summary of the invention
The utility model is intended to solve short, technical problem such as energy conversion efficiency is low, complex structure, volume are big of traditional LED mains lighting supply life-span, has alternating current conversion efficiency height to provide a kind of, the life-span is long, volume is little, the low-power LED driving power of in light weight, characteristics such as manufacturing cost is lower.
The purpose of this utility model is achieved through the following technical solutions.
Low-power LED driving power of the present utility model, the input of power supply connects current rectifying and wave filtering circuit 1, the latter connects power factor circuit 4 and transformer 6, the output of transformer 6 connects this power output end, cross-over connection integrated operational amplifier 5 between the end of the output of transformer 6 and light lotus root 2, the other end of light lotus root 2 connects power factor circuit 4, and integrated operational amplifier 5 is in parallel with voltage stabilizing circuit 7.
Low-power LED driving power of the present utility model, wherein said current rectifying and wave filtering circuit 1 is the rectifier bridge heap.
Low-power LED driving power of the present utility model, wherein said power factor circuit 4 is for adopting the PWM controller SA7527 of PFC control chip.
Low-power LED driving power of the present utility model, wherein said voltage stabilizing circuit 7 is TL431.
The beneficial effect of the utility model low-power LED driving power:
1. the single-stage circuit of reversed excitation scheme that adopts PFC control chip SA7527 to form has obtained higher power factor;
2. saved a pwm chip, made circuit simpler, cost is lower.
3. volume is little, in light weight;
Description of drawings
Fig. 1 circuit theory diagrams of the present utility model
Fig. 2 logic schematic diagram of the present utility model
The number in the figure explanation:
1 rectifier bridge heap, 2 smooth lotus roots, 3 field effect transistor, 4 power factor circuit, 5 integrated operational amplifiers, 6 transformers, 7 voltage stabilizing circuits, 8 protective tubes, 9 Chip-Rs, 10 patch capacitors, 11 diodes, 12 electrochemical capacitors, L live wire, N zero line, GND ground connection
Embodiment
The utility model detailed structure, application principle, effect and effect with reference to accompanying drawing 1-2, are illustrated by following execution mode.
Low-power LED driving power of the present utility model, the input of power supply connects current rectifying and wave filtering circuit 1, the latter connects power factor circuit 4 and transformer 6, the output of transformer 6 connects this power output end, cross-over connection integrated operational amplifier 5 between the end of the output of transformer 6 and light lotus root 2, the other end of light lotus root 2 connects power factor circuit 4, and integrated operational amplifier 5 is in parallel with voltage stabilizing circuit 7.
Current rectifying and wave filtering circuit 1 is for being made of the rectifier bridge heap of cyclic loop four resistance.Power factor circuit 4 is for adopting the PWM controller SA7527 of PFC control chip.Voltage stabilizing circuit 7 is TL431.
The VCC pin of SA7527 connects input of transformer 6 and the receiving tube positive pole of light lotus root 2; Its OUT pin and the parallel connection of GND pin, and serial connection field effect transistor 3 backs connect another input of transformer 6; The 3rd input of its IDET pin series transformer 6; Ground connection behind its CS pin serial connection Chip-R; Ground connection behind its MULT pin serial connection Chip-R; Ground connection behind its EAO pin and the INV pin series resistor; Ground connection behind the receiving tube negative pole series resistor of light lotus root 2; The anodal output that connects transformer 6 of the luminous tube of light lotus root 2, the luminous tube negative pole connects the OUTA pin and the OUTB pin of integrated operational amplifier 5; The VCC pin of integrated operational amplifier 5 connects the output of transformer 6, ground connection behind its INB-pin and the INB+ pin series resistor, its INA-pin and GND pin ground connection, ground connection behind its INA+ pin series resistor; Voltage stabilizing circuit 7 is TL431, and it is connected across between the VCC pin and INB-pin of integrated operational amplifier 5.
After 220V power supply input process power transfer and the power factor correction, the output rectifying and wave-filtering is regulated power supply by constant current constant voltage control therebetween, to reach the requirement output of 29V, 700mA.Through experimental verification, use the utility model, can effectively improve LED semiconductor lighting efficient, its volume is dwindled, life-span and reliability increase.
Therefore, adopt low-power LED driving power of the present utility model, have alternating current conversion efficiency height, the life-span is long, volume is little, in light weight, the plurality of advantages such as manufacturing cost is lower.
Claims (4)
1. low-power LED driving power, it is characterized in that: the input of power supply connects current rectifying and wave filtering circuit (1), the latter connects power factor circuit (4) and transformer (6), the output of transformer (6) connects this power output end, cross-over connection integrated operational amplifier (5) between the end of the output of transformer (6) and light lotus root (2), the other end of light lotus root (2) connects power factor circuit (4), and integrated operational amplifier (5) is in parallel with voltage stabilizing circuit (7).
2. low-power LED driving power as claimed in claim 1 is characterized in that: described current rectifying and wave filtering circuit (1) is the rectifier bridge heap.
3. low-power LED driving power as claimed in claim 1 is characterized in that: described power factor circuit (4) is for adopting the PWM controller SA7527 of PFC control chip.
4. low-power LED driving power as claimed in claim 1 is characterized in that: described voltage stabilizing circuit (7) is TL431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205127805U CN201830505U (en) | 2010-09-01 | 2010-09-01 | Low-power LED driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205127805U CN201830505U (en) | 2010-09-01 | 2010-09-01 | Low-power LED driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201830505U true CN201830505U (en) | 2011-05-11 |
Family
ID=43969015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205127805U Expired - Fee Related CN201830505U (en) | 2010-09-01 | 2010-09-01 | Low-power LED driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201830505U (en) |
-
2010
- 2010-09-01 CN CN2010205127805U patent/CN201830505U/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: 20110511 Termination date: 20150901 |
|
| EXPY | Termination of patent right or utility model |