CN204425742U - For the LED drive circuit of light modulation - Google Patents
For the LED drive circuit of light modulation Download PDFInfo
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- CN204425742U CN204425742U CN201520147821.8U CN201520147821U CN204425742U CN 204425742 U CN204425742 U CN 204425742U CN 201520147821 U CN201520147821 U CN 201520147821U CN 204425742 U CN204425742 U CN 204425742U
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Abstract
The utility model proposes the LED drive circuit for light modulation that a kind of circuit is comparatively simple, conversion efficiency is high, small volume, cost are low, the control chip that it comprises input unit, model is IW3602 it also comprise resistance R4 to R18, electric capacity C2 to C9, diode D1 to D4, metal-oxide-semiconductor Q1 to Q3, voltage-stabiliser tube D0, band tap two winding transformer T.
Description
Technical field
The utility model relates to LED drive circuit technical field, is specifically a kind of LED drive circuit for light modulation.
Background technology
LED drive circuit for light modulation has key effect in LED illumination industry, along with technological evolvement, the current LED drive circuit for light modulation generally adopts chip as the design of control unit more, this kind of scheme has that circuit is simple, the feature of function admirable, but the chip that light has had or inadequate, the periphery circuit design around chip formed required for complete circuit is extremely important.
Existing model is that the control chip of IW3602 has good cost performance, but still there is shortcoming in the disclosed LED drive circuit for light modulation around IW3602 design at present, such as guarantee circuit is comparatively simple while, how to improve conversion efficiency, if circuit to do comparatively complicated by raising conversion efficiency, so the volume of the entirety of the LED drive circuit caused for light modulation cannot be reduced further, cost also cannot reduce further, therefore, further research is also needed in this respect.
Utility model content
Technical problem to be solved in the utility model is, overcomes the defect of prior art, provides the LED drive circuit for light modulation that a kind of circuit is comparatively simple, conversion efficiency is high, small volume, cost are low.
For solving the problems of the technologies described above, the utility model proposes a kind of LED drive circuit for light modulation, it comprises input unit, model is the control chip of IW3602, and it also comprises resistance R4 to R18, electric capacity C2 to C9, diode D1 to D4, metal-oxide-semiconductor Q1 to Q3, voltage-stabiliser tube D0, band tap two winding transformer T, the positive pole of the bridge rectifier BR1 of input unit, resistance R4 is all connected with the anode of diode D1 with one end of resistance R6, the negative terminal of diode D1, electric capacity C2, resistance R8, electric capacity C3, resistance R10, the armature winding N1 of transformer T, electric capacity C5 is all connected with output negative pole end V-with one end of resistance R12, the other end of resistance R4 is connected with one end of resistance R5, the other end of resistance R6 is held with the D of metal-oxide-semiconductor Q1 and is connected, the S end of metal-oxide-semiconductor Q1 is connected with one end of resistance R7, the G end of metal-oxide-semiconductor Q1 is connected with the 1st pin of control chip, the other end of resistance R8 is connected with one end of resistance R9, and the other end of resistance R9 is held with the D of metal-oxide-semiconductor Q2 and is connected, the S end of metal-oxide-semiconductor Q2, the negative terminal of diode D4, the negative terminal of voltage-stabiliser tube D0, one end of electric capacity C9 is all connected with the 8th pin of control chip, the G end of metal-oxide-semiconductor Q2, the other end of resistance R5, one end of electric capacity C7 is all connected with the 3rd pin of control chip, electric capacity C3, the other end of resistance R10 is all connected with the negative terminal of diode D2, the anode of diode D2, the other end of armature winding N1 is all held with the D of metal-oxide-semiconductor Q3 and is connected, the S end of metal-oxide-semiconductor Q3, one end of resistance R18 is all connected with one end of resistance R17, and the other end of resistance R17 is connected with the 6th pin of control chip, is connected, is positioned at the tap terminals of armature winding N1 after the G end series resistance R16 of metal-oxide-semiconductor Q3 with the 7th pin of control chip, one end of electric capacity C4 is all connected with the anode of diode D3, and the other end of electric capacity C4 is connected with one end of resistance R11, the negative terminal of diode D3, resistance R11, electric capacity C5 is all connected with output cathode end V+ with the other end of resistance R12, the anode of diode D4, one end of the secondary winding N2 of transformer T is all connected with one end of resistance R13, the other end of resistance R13, electric capacity C6 is all connected with the 2nd pin of control chip with one end of resistance R14, electric capacity C8, one end of resistance R15 is all connected with the 4th pin of control chip, the negative pole of the bridge rectifier BR1 of input unit, 5th pin of control chip, the anode of voltage-stabiliser tube D0, the other end of secondary winding N2 and resistance R7, electric capacity C2, electric capacity C6, resistance R14, electric capacity C7, electric capacity C8, resistance R15, resistance R18, the equal ground connection of the other end of electric capacity C9.
After adopting said structure, compared with prior art, the utility model has the following advantages: this circuit conversion efficiency is high, can 85% be reached, and integrated circuit is comparatively simple, cost is lower, like this after design, circuit integrity volume is little, therefore, the utility model has the advantage that circuit is comparatively simple, conversion efficiency is high, small volume, cost are low.
As improvement, input unit comprises resettable fuse FR, resistance R0 to R3, core inductance L1 to L2, electric capacity C1, resistance R0, one end of core inductance L1 parallel connection is connected with one end of resettable fuse FR, resistance R0, the other end of core inductance L1 parallel connection, one end of electric capacity C1, resistance R2, one end of R3 series connection all exchanges incoming end with first of bridge rectifier BR1 and is connected, the other end of resettable fuse FR is held with alternating current L and is connected, resistance R1, one end of core inductance L2 parallel connection is held with alternating current N and is connected, resistance R1, the other end of core inductance L2 parallel connection, the other end of electric capacity C1, resistance R2, the other end of R3 series connection all exchanges incoming end with second of bridge rectifier BR1 and is connected, like this, circuit is simple can have better performance simultaneously, thus make late-class circuit work more stable, reliably.
As improvement, electric capacity C2, electric capacity C5, electric capacity C9 are polar capacitor, and one end of one end of electric capacity C2, the other end of electric capacity C5, electric capacity C9 is positive pole, like this, more be conducive to the stability of integrated circuit, the raising of reliability, use safer, durable simultaneously.
As improvement, resistance R15 is variable resistance, and like this, not only structure is simple, cost is low, and designs like this, without the need to increasing extra components and parts, just can finely tune circuit easily, thus make circuit performance better.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the utility model for the LED drive circuit of light modulation.
Embodiment
Below the utility model is described in further detail:
The utility model is used for the LED drive circuit of light modulation, it comprises input unit, model is the control chip of IW3602, and it also comprises resistance R4 to R18, electric capacity C2 to C9, diode D1 to D4, metal-oxide-semiconductor Q1 to Q3, voltage-stabiliser tube D0, band tap two winding transformer T, the positive pole of the bridge rectifier BR1 of input unit, resistance R4 is all connected with the anode of diode D1 with one end of resistance R6, the negative terminal of diode D1, electric capacity C2, resistance R8, electric capacity C3, resistance R10, the armature winding N1 of transformer T, electric capacity C5 is all connected with output negative pole end V-with one end of resistance R12, the other end of resistance R4 is connected with one end of resistance R5, the other end of resistance R6 is held with the D of metal-oxide-semiconductor Q1 and is connected, the S end of metal-oxide-semiconductor Q1 is connected with one end of resistance R7, the G end of metal-oxide-semiconductor Q1 is connected with the 1st pin of control chip, the other end of resistance R8 is connected with one end of resistance R9, and the other end of resistance R9 is held with the D of metal-oxide-semiconductor Q2 and is connected, the S end of metal-oxide-semiconductor Q2, the negative terminal of diode D4, the negative terminal of voltage-stabiliser tube D0, one end of electric capacity C9 is all connected with the 8th pin of control chip, the G end of metal-oxide-semiconductor Q2, the other end of resistance R5, one end of electric capacity C7 is all connected with the 3rd pin of control chip, electric capacity C3, the other end of resistance R10 is all connected with the negative terminal of diode D2, the anode of diode D2, the other end of armature winding N1 is all held with the D of metal-oxide-semiconductor Q3 and is connected, the S end of metal-oxide-semiconductor Q3, one end of resistance R18 is all connected with one end of resistance R17, and the other end of resistance R17 is connected with the 6th pin of control chip, is connected, is positioned at the tap terminals of armature winding N1 after the G end series resistance R16 of metal-oxide-semiconductor Q3 with the 7th pin of control chip, one end of electric capacity C4 is all connected with the anode of diode D3, and the other end of electric capacity C4 is connected with one end of resistance R11, the negative terminal of diode D3, resistance R11, electric capacity C5 is all connected with output cathode end V+ with the other end of resistance R12, the anode of diode D4, one end of the secondary winding N2 of transformer T is all connected with one end of resistance R13, the other end of resistance R13, electric capacity C6 is all connected with the 2nd pin of control chip with one end of resistance R14, electric capacity C8, one end of resistance R15 is all connected with the 4th pin of control chip, the negative pole of the bridge rectifier BR1 of input unit, 5th pin of control chip, the anode of voltage-stabiliser tube D0, the other end of secondary winding N2 and resistance R7, electric capacity C2, electric capacity C6, resistance R14, electric capacity C7, electric capacity C8, resistance R15, resistance R18, the equal ground connection of the other end of electric capacity C9.
Input unit comprises resettable fuse FR, resistance R0 to R3, core inductance L1 to L2, electric capacity C1, resistance R0, one end of core inductance L1 parallel connection is connected with one end of resettable fuse FR, resistance R0, the other end of core inductance L1 parallel connection, one end of electric capacity C1, resistance R2, one end of R3 series connection all exchanges incoming end with first of bridge rectifier BR1 and is connected, the other end of resettable fuse FR is held with alternating current L and is connected, resistance R1, one end of core inductance L2 parallel connection is held with alternating current N and is connected, resistance R1, the other end of core inductance L2 parallel connection, the other end of electric capacity C1, resistance R2, the other end of R3 series connection all exchanges incoming end with second of bridge rectifier BR1 and is connected.
Electric capacity C2, electric capacity C5, electric capacity C9 are polar capacitor, and one end of one end of electric capacity C2, the other end of electric capacity C5, electric capacity C9 is positive pole.
Resistance R15 is variable resistance.
Described model is the control chip of IW3602 is commercially available, and the concrete definition of each pin and function repeat with regard to not adding.
The above is only better embodiment of the present utility model, therefore all equivalences done according to structure, feature and the principle described in the utility model patent claim change or modify, and are included in the utility model patent claim.
Claims (4)
1. the LED drive circuit for light modulation, it comprises input unit, model is the control chip of IW3602, it is characterized in that, it also comprises resistance R4 to R18, electric capacity C2 to C9, diode D1 to D4, metal-oxide-semiconductor Q1 to Q3, voltage-stabiliser tube D0, band tap two winding transformer T, the positive pole of the bridge rectifier BR1 of input unit, resistance R4 is all connected with the anode of diode D1 with one end of resistance R6, the negative terminal of diode D1, electric capacity C2, resistance R8, electric capacity C3, resistance R10, the armature winding N1 of transformer T, electric capacity C5 is all connected with output negative pole end V-with one end of resistance R12, the other end of resistance R4 is connected with one end of resistance R5, the other end of resistance R6 is held with the D of metal-oxide-semiconductor Q1 and is connected, the S end of metal-oxide-semiconductor Q1 is connected with one end of resistance R7, the G end of metal-oxide-semiconductor Q1 is connected with the 1st pin of control chip, the other end of resistance R8 is connected with one end of resistance R9, and the other end of resistance R9 is held with the D of metal-oxide-semiconductor Q2 and is connected, the S end of metal-oxide-semiconductor Q2, the negative terminal of diode D4, the negative terminal of voltage-stabiliser tube D0, one end of electric capacity C9 is all connected with the 8th pin of control chip, the G end of metal-oxide-semiconductor Q2, the other end of resistance R5, one end of electric capacity C7 is all connected with the 3rd pin of control chip, electric capacity C3, the other end of resistance R10 is all connected with the negative terminal of diode D2, the anode of diode D2, the other end of armature winding N1 is all held with the D of metal-oxide-semiconductor Q3 and is connected, the S end of metal-oxide-semiconductor Q3, one end of resistance R18 is all connected with one end of resistance R17, and the other end of resistance R17 is connected with the 6th pin of control chip, is connected, is positioned at the tap terminals of armature winding N1 after the G end series resistance R16 of metal-oxide-semiconductor Q3 with the 7th pin of control chip, one end of electric capacity C4 is all connected with the anode of diode D3, and the other end of electric capacity C4 is connected with one end of resistance R11, the negative terminal of diode D3, resistance R11, electric capacity C5 is all connected with output cathode end V+ with the other end of resistance R12, the anode of diode D4, one end of the secondary winding N2 of transformer T is all connected with one end of resistance R13, the other end of resistance R13, electric capacity C6 is all connected with the 2nd pin of control chip with one end of resistance R14, electric capacity C8, one end of resistance R15 is all connected with the 4th pin of control chip, the negative pole of the bridge rectifier BR1 of input unit, 5th pin of control chip, the anode of voltage-stabiliser tube D0, the other end of secondary winding N2 and resistance R7, electric capacity C2, electric capacity C6, resistance R14, electric capacity C7, electric capacity C8, resistance R15, resistance R18, the equal ground connection of the other end of electric capacity C9.
2. the LED drive circuit for light modulation according to claim 1, it is characterized in that, input unit comprises resettable fuse FR, resistance R0 to R3, core inductance L1 to L2, electric capacity C1, resistance R0, one end of core inductance L1 parallel connection is connected with one end of resettable fuse FR, resistance R0, the other end of core inductance L1 parallel connection, one end of electric capacity C1, resistance R2, one end of R3 series connection all exchanges incoming end with first of bridge rectifier BR1 and is connected, the other end of resettable fuse FR is held with alternating current L and is connected, resistance R1, one end of core inductance L2 parallel connection is held with alternating current N and is connected, resistance R1, the other end of core inductance L2 parallel connection, the other end of electric capacity C1, resistance R2, the other end of R3 series connection all exchanges incoming end with second of bridge rectifier BR1 and is connected.
3. the LED drive circuit for light modulation according to claim 1, is characterized in that, electric capacity C2, electric capacity C5, electric capacity C9 are polar capacitor, and one end of one end of electric capacity C2, the other end of electric capacity C5, electric capacity C9 is positive pole.
4. the LED drive circuit for light modulation according to claim 1, is characterized in that, resistance R15 is variable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520147821.8U CN204425742U (en) | 2015-03-16 | 2015-03-16 | For the LED drive circuit of light modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520147821.8U CN204425742U (en) | 2015-03-16 | 2015-03-16 | For the LED drive circuit of light modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204425742U true CN204425742U (en) | 2015-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520147821.8U Expired - Fee Related CN204425742U (en) | 2015-03-16 | 2015-03-16 | For the LED drive circuit of light modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204425742U (en) |
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2015
- 2015-03-16 CN CN201520147821.8U patent/CN204425742U/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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Jiaxing City, Zhejiang province 314419 Haining city Zhejiang Haining warp knitting industrial park Yuen Road No. 1002 Building No. 1 Patentee after: Zhejiang Future Lighting Co., Ltd. Address before: Jiaxing City, Zhejiang Province, Haining City, Zhejiang Province, 314419 Zhejiang Haining Warp Knitting Industrial Park Road No. 1002 Building No. 1 Patentee before: HAINING FUTURE LIGHRTING CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20190316 |
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| CF01 | Termination of patent right due to non-payment of annual fee |