CN202713718U - Large power resonant soft switch LED constant current driving power supply - Google Patents
Large power resonant soft switch LED constant current driving power supply Download PDFInfo
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- CN202713718U CN202713718U CN 201220322050 CN201220322050U CN202713718U CN 202713718 U CN202713718 U CN 202713718U CN 201220322050 CN201220322050 CN 201220322050 CN 201220322050 U CN201220322050 U CN 201220322050U CN 202713718 U CN202713718 U CN 202713718U
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- soft switch
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Abstract
The utility model provides a large power resonant soft switch LED constant current driving power supply and aims to solve a technical problem that an LED lighting lamp of LED energy saving lamps in the current market can not be matched with a driving power supply to make the LED lighting lamp be discarded at an earlier state. The large power resonant soft switch LED constant current driving power supply is characterized in that a power factor correction circuit which is composed of a power factor correction chip IC1, a booster driving pipe Q1, an energy storage coil L2 and a booster diode D1, and a resonant soft switch half-bridge driving circuit which is composed of a resonant soft switch half-bridge driving chip IC2, two booster driving pipes Q2 and Q3, a capacitor C5 and a transformer T1 are connected in series between a full wave rectifier circuit DB1 and a rectifier circuit. The large power resonant soft switch LED constant current driving power supply is advantaged in that the large power resonant soft switch LED constant current driving power supply is matched with service life of an LED lamp bead and long service life design of the LED driving power supply is realized.
Description
Technical field
The utility model relates to a kind of high power resonant vibration formula soft switch LED lamp (hereinafter referred to as LED) constant-current driving power supply.
Background technology
Existing LED driving power mostly adopts type voltage regulation Switching Power Supply common on the market.It is a kind of stabilized voltage power supply, and electrochemical capacitor is wherein arranged, because LED needs to drive with constant current, causes easily the LED light decay serious, the useful life of having reduced LED.And power supply this under hot conditions, work, the electrolyte in the electrochemical capacitor is easily dry and lost efficacy, and has seriously reduced the useful life of driving power, has restricted the normal use of LED illuminating lamp.
LED electricity-saving lamp on the market mostly adopts resistance-capacitance depressurization power supply or low power factor driving power now, perhaps clear-cut Switching Power Supply of bribing usefulness in market.General LED illuminating lamp exists driving power and the unmatched serious problems of LED illuminating lamp, so so that the LED illuminating lamp is scrapped in advance, also just can use 1-2, seldom can use more than 2 years.
Summary of the invention
For prolonging the useful life of LED illuminating lamp, the purpose of this utility model provides the soft switch LED of a kind of high power resonant vibration formula constant-current driving power supply.
The purpose of this utility model is achieved in that it comprises ac filter circuit, full-wave rectifying circuit DB1, rectification circuit, filter circuit, voltage stabilizing circuit and constant-current drive circuit, it is characterized in that: between full-wave rectifying circuit DB1 and rectification circuit, seal in the circuit of power factor correction that is formed by power factor correction chip IC 1, driving tube Q1, energy storage coil L2, booster diode D1, and the resonant type soft-switch half-bridge drive circuit that is formed by resonant type soft-switch half-bridge driven chip IC 2, two driving tube Q2 and Q3, capacitor C 5, transformer T1.
Further specify the utility model below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is electrical schematic diagram of the present utility model.
Embodiment
AC power enters the ac filter circuit that is comprised of CX1, L1, CX2 and the input side that exchanges of full-wave rectifying circuit (DB1) successively by binding post N and L; The direct current outlet side of full bridge rectifier (DB1) CBB capacitor C 1 in parallel; Circuit of power factor correction is, energy storage coil L2 is connected between high direct voltage side and the booster diode D1, the positive terminal of booster diode D1 is connected to the drain electrode of driving tube Q1, the negative pole of booster diode D1 is connected to the drain electrode of the driving tube Q2 in the resonant type soft-switch half-bridge drive circuit, the source electrode of driving tube Q1 links to each other with the negative pole of the direct current output of full bridge rectifier (DB1), and the signal output part OUT of power factor correction chip IC 1 is connected to the grid of driving tube Q1 through resistance R 3; Resistance R 2 is connected between the RT end and ground of chip IC 1, and capacitor C 2 is connected between the CT end and ground of chip IC 1, and current sampling resistor R1 connects between the negative pole end of full bridge rectifier (DB1) and the ground and joins with the COM end of chip IC 1.The sampling end FB of chip connects the junction with resistance R 4, R5.
The resonant type soft-switch half-bridge drive circuit is, two signal output parts of resonant type soft-switch half-bridge driven chip IC 2 are connected on respectively the grid of two driving tube Q2 and Q3, be connected on the clock end of half-bridge driven chip IC 2 after R8, the C4 parallel connection, the source class of half-bridge driven pipe Q2 is connected on the drain electrode of Q3, the source class ground connection of Q3, the primary coil of transformer T1 is connected on the junction of Q2 and Q3, another termination capacitor C 5, the negative pole end of another terminating diode D1 of C5.
Rectification circuit is, the negative pole that the positive terminal of two rectifier diode D2 and D3 is connected on respectively two ends, D2 and the D3 of transformer T1 output stage links together, connects with differential mode inductance L3, then meets common mode inductance L4; At the two ends of common mode inductance L4 and be connected to filter capacitor C6, C7; Finish the filtering of transformer output stage.The input of optocoupler U1 connects respectively two ends with common mode inductance through resistance R 11, R12, connects voltage-stabiliser tube VR1 at resistance R 12 places, then connects output ground.Finish voltage stabilizing control.
Constant-current drive circuit is, the signal output part of constant current control chip U2 connects and constant current amplifier tube Q4 through resistance R 15, and the source class of Q4 connects output ground through resistance R 16; The drain electrode of Q4 connects the negative pole of LED luminous tube; Inductance L 5 connects and common mode inductance L 4, the positive pole of another termination LED luminous tube.
M1 is accessory power supply, is circuit of power factor correction, half-bridge drive circuit, and constant-current control circuit provides working power.
Compared with prior art, good effect of the present utility model is: improve the operating frequency of Switching Power Supply, adopt the resonant type soft-switch principle, to reduce the switching loss of VMOS pipe, reduce Switching Power Supply self-heating amount, adopt differential mode and common mode inductance and CBB electric capacity Eliminate highter harmonic; Adopt voltage stabilizing technique, so that LED is unlikely to burn LED or causes light decay when breaking down, adopt again afterwards constant current drive mode to come driving LED, so that LED always works under the constant current state.The LED driving power must be obeyed the specification requirement of LED luminous tube.Make it to be complementary with the useful life of LED lamp pearl, realize the long-life design of LED driving power.
Claims (2)
1. the soft switch LED of high power resonant vibration formula constant-current driving power supply, it comprises ac filter circuit, full-wave rectifying circuit DB1, rectification circuit, filter circuit, voltage stabilizing circuit, constant-current drive circuit, it is characterized in that: between full-wave rectifying circuit DB1 and rectification circuit, seal in by power factor correction chip IC 1, driving tube Q1 boosts, energy storage coil L2, the circuit of power factor correction that booster diode D1 forms, and by resonant type soft-switch half-bridge driven chip IC 2, two boost driving tube Q2 and Q3, capacitor C 5, the resonant type soft-switch half-bridge drive circuit that transformer T1 forms.
2. according to the soft switch LED of high power resonant vibration formula claimed in claim 1 constant-current driving power supply, it is characterized in that: said circuit of power factor correction is, energy storage coil L2 is connected between high direct voltage side and the booster diode D1, the positive terminal of booster diode D1 is connected to the drain electrode of driving tube Q1, the negative pole of booster diode D1 is connected to the drain electrode of the driving tube Q2 in the resonant type soft-switch half-bridge drive circuit, the source electrode of driving tube Q1 links to each other with the negative pole of the direct current output of full bridge rectifier (DB1), and the signal output part OUT of power factor correction chip IC 1 is connected to the grid of driving tube Q1 through resistance R 3;
Said resonant type soft-switch half-bridge drive circuit is, two signal output parts of resonant type soft-switch half-bridge driven chip IC 2 are connected on respectively the grid of two bridge driving tube Q2 and Q3, be connected on the clock end of half-bridge driven chip IC 2 after R8, the C4 parallel connection, the source class of half-bridge driven pipe Q2 is connected on the drain electrode of Q3, the source class ground connection of Q3, the primary coil of transformer T1 is connected on the junction of Q2 and Q3, another termination capacitor C 5, the negative pole end of another terminating diode D1 of C5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220322050 CN202713718U (en) | 2012-07-05 | 2012-07-05 | Large power resonant soft switch LED constant current driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220322050 CN202713718U (en) | 2012-07-05 | 2012-07-05 | Large power resonant soft switch LED constant current driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202713718U true CN202713718U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220322050 Expired - Fee Related CN202713718U (en) | 2012-07-05 | 2012-07-05 | Large power resonant soft switch LED constant current driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202713718U (en) |
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2012
- 2012-07-05 CN CN 201220322050 patent/CN202713718U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20190705 |