CN202059614U - Miniwatt power supply for LED lightening - Google Patents
Miniwatt power supply for LED lightening Download PDFInfo
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- CN202059614U CN202059614U CN2010206999204U CN201020699920U CN202059614U CN 202059614 U CN202059614 U CN 202059614U CN 2010206999204 U CN2010206999204 U CN 2010206999204U CN 201020699920 U CN201020699920 U CN 201020699920U CN 202059614 U CN202059614 U CN 202059614U
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- pin
- output
- led
- driving governor
- resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Abstract
The utility model discloses a miniwatt power supply for LED lightening, comprising a rectification filtering, a buffer drive circuit, an output rectification and an LED load. The miniwatt power supply has simple and unique structure, and small volume, thus suitable for being mounted in a bulb lampholder. An output feedback is superposed outside the secondary, the voltage and current of the sampling resistor of a feedback signal are adopted and sent to a controlled feedback end, a control circuit adjusts at the primary based on the variation of the output current and voltage, thus realizing constant voltage constant current output to meet the requirements of LED driving, thereby realizing the constant current lightening of an LED bulb lamp, with small structure and small volume. Compared with the prior art, the most obvious characteristic lies in that a full voltage (85V-260V) constant current power supply is provided for LED lightening. The structure is simple and unique, the volume is small, the cost is low, the photoelectric efficiency is high, main body lightening with LED is realized, and electricity is saved by about 10%, compared with a compact fluorescent lamp, on the premise that the brightnesses of the power supply and the compact fluorescent lamp are same. The miniwatt power supply has the advantages of low temperature, long service life (100 thousand hours), no electromagnetic radiation, reduced room temperature effect, environmental protection benefit and realizing real energy-saving environment-friendly green lighting.
Description
One, technical field
The utility model relates to a kind of LED illumination small-power power, and (constant-current driving LED that uses of the scope of 85V～260V) throws light on and uses small-power power especially a kind of simple in structure, with low cost, full voltage.
Two, background technology
At present, LED (light-emitting diode) is so that its volume is little, in light weight, energy consumption is low, long (reaching 100,000 hours), photoelectric efficiency height of safe and reliable, life-span, help advantage such as environmental protection in the extensive use of a plurality of fields, as is applied to the lamp of demonstration usefulness of stop lamp, Landscape Lamp, decorative lamp, background light, indicator light, alarm lamp, traffic lights and the display screen etc. of automobile.The power supply that existing LED uses all be usually low pressure (constant voltage of 3V～36V), the basic structure form has following two kinds: a kind of is the voltage stabilizing circuit that is provided with transforming circuit and joins with it, can the unnecessary energy of elimination in the process of transformation voltage stabilizing, cause energy waste; Another kind is a high frequency switch power, can produce multiple harmonic and electrical network is polluted.No matter be the LED power supply of which kind of form, all exist complex structure, shortcoming such as volume is big, cost is high and load is low, to such an extent as to existing LED can't be applied to the illumination such as places such as family, market, hotel, office buildings, causing lighting energy consumption is about 5% of total power consumption.
Three, summary of the invention
The purpose of this utility model is can't be in the technical problem of lighting field widespread usage in order to solve LED that prior art exists, provide a kind of simple in structure, volume is little, with low cost, full voltage (the constant-current driving LED illumination small-power power that the scope of 85V～260V) is used.
The purpose of this utility model is achieved like this: it comprises rectifying and wave-filtering, buffering drive circuit, output rectification and LED load are formed, rectifying and wave-filtering (BD1, L1, C1) output termination transformer ground floor winding is drawn 6 pin and buffering drive circuit (C2, R2) and starting resistance (R1), transformer ground floor winding is drawn 5 pin and is connect the positive pole of buffering drive circuit diode (D1) and the collector electrode of power drive pipe (Q1), the negative pole of buffering drive circuit diode (D1) meets drive circuit (C2, R2) the other end, transformer second layer winding is drawn the positive pole that 4 pin connect output rectifier diode (D4), the negative pole of output rectifier diode (D4) connects the positive pole of output filter capacitor (C5) and the positive pole of LED load, transformer second layer winding is drawn 1 pin and is connect the negative pole of output filter capacitor (C5) and the negative pole of LED load, the 3rd layer of winding of transformer drawn the upper end of 7 pin connecting resistances (R7) and the positive pole of diode (D3), the lower end of resistance (R7) links to each other with the upper end of resistance (R8) and inserts 1 pin of driving governor chip (U1), the 3rd layer of winding of transformer drawn 2 of the lower end of 8 pin connecting resistances (R8) and driving governor chip (U1), 3 pin, driving governor chip (U1) is adjusted the level of 4 pin according to the variation of 1 pin, 4 pin of driving governor chip (U1) connect the emitter of power drive pipe (Q1), the negative pole of diode (D3) is by a current-limiting resistance (R4) and resistance (R1, R3, R5), the negative pole of electric capacity (C3) and diode (D2) links to each other, 5 pin of another termination driving governor chip (U1) of resistance (R5) are that driving governor chip (U1) provides power supply, 2 of another termination driving governor chip (U1) of electric capacity (C3), 3 pin are driving governor chip (U1) power filter, another termination rectification output end of resistance (R1) is that driving governor PT4201 (U1) provides starting current, and the base stage that the positive pole of resistance (R3) other end and diode (D2) connects power drive pipe (Q1) is that power drive pipe (Q1) provides drive current.
The utility model is compared with prior art, and maximum characteristics are that (85V～260V) constant current is that LED provides the electric consumption on lighting source with full voltage.Simple in structure, volume is little, with low cost, photoelectric efficiency is high, can the LED realization body illumination, under the prerequisite of equal brightness, economize on electricity about 10% than compact fluorescent lamp.Simultaneously the utility model have also that volume is little, with low cost, photoelectric efficiency is high, temperature is low, advantages such as life-span long (reaching 100,000 hours) and electromagnetic-radiation-free, can reduce room temperature effect, be beneficial to environmental protection, be the green illumination of real energy-conserving and environment-protective.
Four, description of drawings
Accompanying drawing 1 is the utility model LED illumination small-power power schematic diagram.
Accompanying drawing 2 is the utility model LED illumination small-power power theory diagrams.
Five, embodiment
Below in conjunction with description of drawings embodiment of the present utility model.
With reference to accompanying drawing, the utility model LED illumination small-power power, input links to each other with output, and output links to each other with feedback, and feedback links to each other with control, and control links to each other with power switch, and power switch drives with elementary buffering and links to each other.
The utility model LED illumination small-power power, it comprises: rectifying and wave-filtering, buffering drive circuit, output rectification and LED load are formed, rectifying and wave-filtering (BD1 L1 C1) output termination transformer ground floor winding is drawn 6 pin and buffering drive circuit (C2 R2) and starting resistance (R1), transformer ground floor winding is drawn 5 pin and is connect the positive pole of buffering drive circuit diode (D1) and the collector electrode of power drive pipe (Q1), and the negative pole of buffering drive circuit diode (D1) connects the other end of drive circuit (C2 R2) to realize elementary driving; Transformer second layer winding is drawn the positive pole that 4 pin connect output rectifier diode (D4), the negative pole of output rectifier diode (D4) connects the positive pole of output filter capacitor (C5) and the positive pole of load LED, transformer second layer winding is drawn 1 pin and is connect the negative pole of output filter capacitor (C5) and the negative pole of load LED, drives to realize output; The 3rd layer of winding of transformer drawn the upper end of 7 pin connecting resistances (R7) and the positive pole of diode (D3), the lower end of resistance (R7) links to each other with the upper end of resistance (R8) and inserts 1 pin of driving governor chip (U1), the 3rd layer of winding of transformer drawn the lower end of 8 pin connecting resistances (R8) and 2,3 pin (U1), to realize following the tracks of the variation of output voltage electric current, in time feed back; The level of 4 pin is adjusted in the variation of driving governor chip (U1) foundation 1 pin, and 4 pin of driving governor chip (U1) connect the emitter of power drive pipe (Q1), power controlling driving tube (Q1) Guan Yukai; The negative pole of diode (D3) links to each other with (R1 R3 R5 C3) and the negative pole of diode (D2) by a current-limiting resistance (R4), 5 pin of another termination driving governor chip (U1) of resistance (R5) are that driving governor chip (U1) provides power supply, 2 of another termination driving governor chip (U1) of electric capacity (C3), 3 pin are driving governor chip (U1) power filter, another termination rectification output end of resistance (R1) is that driving governor PT4201 (U1) provides starting current, and the base stage that the positive pole of resistance (R3) other end and diode (D2) connects power drive pipe (Q1) is that power drive pipe (Q1) provides drive current.This winding of transformer is in order to realize output and input and feedback and output close coupling.
During use, (85V～260V) inserts input with alternating voltage, sending into elementary buffering behind rectifying and wave-filtering drives, offer load LED realization illumination to exporting rectifying and wave-filtering again, the situation of change of the sampling resistor sampling output loading of feedback end, load information is delivered to control, control receives that feedback information adjusts the Push And Release frequency and the time of the power tube of switch element, thereby control the purpose that elementary buffering drove and then reached the adjustment output loading, output voltage is decided by the ratio of sampling resistor, and output current is decided by the value of sampling resistor.
(FR1) antisurge protection, (BD1, L1; C1) input rectifying filtering, (R2, C2; D1) elementary buffering, (D4, C5) the output rectifying and wave-filtering offers load LED and realizes illumination; resistance (R7; R8) situation of change of sampling output loading is delivered to control with load information, (D2; R3, Q1) power drive switch element.
Claims (1)
1. a LED throws light on and uses small-power power, it comprises: rectifying and wave-filtering, buffering drive circuit, output rectification and LED load are formed, it is characterized in that: rectifying and wave-filtering (BD1, L1, C1) output termination transformer ground floor winding is drawn 6 pin and buffering drive circuit (C2, R2) and starting resistance (R1), transformer ground floor winding is drawn 5 pin and is connect the positive pole of buffering drive circuit diode (D1) and the collector electrode of power drive pipe (Q1), the negative pole of buffering drive circuit diode (D1) meets drive circuit (C2, R2) the other end, transformer second layer winding is drawn the positive pole that 4 pin connect output rectifier diode (D4), the negative pole of output rectifier diode (D4) connects the positive pole of output filter capacitor (C5) and the positive pole of LED load, transformer second layer winding is drawn 1 pin and is connect the negative pole of output filter capacitor (C5) and the negative pole of LED load, the 3rd layer of winding of transformer drawn the upper end of 7 pin connecting resistances (R7) and the positive pole of diode (D3), the lower end of resistance (R7) links to each other with the upper end of resistance (R8) and inserts 1 pin of driving governor chip (U1), the 3rd layer of winding of transformer drawn 2 of the lower end of 8 pin connecting resistances (R8) and driving governor chip (U1), 3 pin, driving governor chip (U1) is adjusted the level of 4 pin according to the variation of 1 pin, 4 pin of driving governor chip (U1) connect the emitter of power drive pipe (Q1), the negative pole of diode (D3) is by a current-limiting resistance (R4) and resistance (R1, R3, R5), the negative pole of electric capacity (C3) and diode (D2) links to each other, 5 pin of another termination driving governor chip (U1) of resistance (R5) are that driving governor chip (U1) provides power supply, 2 of another termination driving governor chip (U1) of electric capacity (C3), 3 pin are driving governor chip (U1) power filter, another termination rectification output end of resistance (R1) is that driving governor chip (U1) provides starting current, and the base stage that the positive pole of resistance (R3) other end and diode (D2) connects power drive pipe (Q1) is that power drive pipe (Q1) provides drive current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206999204U CN202059614U (en) | 2010-12-31 | 2010-12-31 | Miniwatt power supply for LED lightening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206999204U CN202059614U (en) | 2010-12-31 | 2010-12-31 | Miniwatt power supply for LED lightening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202059614U true CN202059614U (en) | 2011-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206999204U Expired - Fee Related CN202059614U (en) | 2010-12-31 | 2010-12-31 | Miniwatt power supply for LED lightening |
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| Country | Link |
|---|---|
| CN (1) | CN202059614U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900195A (en) * | 2015-05-12 | 2015-09-09 | 来安县新元机电设备设计有限公司 | Backlight control circuit and device thereof |
| CN116347706A (en) * | 2023-04-05 | 2023-06-27 | 杭州方千科技有限公司 | Traffic signal lamp power supply and control method |
-
2010
- 2010-12-31 CN CN2010206999204U patent/CN202059614U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900195A (en) * | 2015-05-12 | 2015-09-09 | 来安县新元机电设备设计有限公司 | Backlight control circuit and device thereof |
| CN116347706A (en) * | 2023-04-05 | 2023-06-27 | 杭州方千科技有限公司 | Traffic signal lamp power supply and control method |
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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: 20111130 Termination date: 20121231 |