CN202121832U - Safe power supply with constant current and constant voltage for LED light - Google Patents
Safe power supply with constant current and constant voltage for LED light Download PDFInfo
- Publication number
- CN202121832U CN202121832U CN2011201941748U CN201120194174U CN202121832U CN 202121832 U CN202121832 U CN 202121832U CN 2011201941748 U CN2011201941748 U CN 2011201941748U CN 201120194174 U CN201120194174 U CN 201120194174U CN 202121832 U CN202121832 U CN 202121832U
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- power supply
- output
- constant voltage
- constant current
- comparison circuit
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Abstract
The utility model provides a safe power supply with constant current and constant voltage for an LED light. The safe power supply with constant current and constant voltage for an LED light comprises a rectifier circuit and a constant current/constant voltage circuit, and is characterized in that the constant current/constant voltage circuit comprises a microcomputer control chip, a switching tube, a photo-coupler, a constant current comparison circuit, a constant voltage comparison circuit and four groups of coil windings winding the same wire core; an output terminal of the rectifier circuit is connected with the first coil winding and the switching tube; the switching tube is connected with the microcomputer control chip which is connected with the rectifier circuit; the second coil winding is connected with the microcomputer control chip; the photo-coupler is connected with the microcomputer control chip; the photo-coupler is connected with the rectifier circuit; the third coil winding is respectively connected with positive electrode of power output and negative electrode of power output; the constant current comparison circuit is connected with a constant voltage power supply; the positive electrode of power output and the negative electrode of power output are respectively connected with the constant voltage comparison circuit; the constant current comparison circuit is connected with the photo-coupler; and the photo-coupler is connected with the fourth coil winding. Compared with the prior technology, the safe power supply with constant current and constant voltage for an LED light provided by the utility model has the advantages of simple structure, small volume, high precision of constant current and constant voltage, high safety, high power factor and the like.
Description
Technical field
The utility model relates to a kind of lamp power.
Background technology
Existing LED lamp all need be equipped with the power supply of voltage, current stabilization, and the existing technology or the complex structure of product, volume are big, or constant current, constant voltage precision are low, poor stability, power factor are low.
Summary of the invention
The goal of the invention of the utility model be to provide a kind of simple in structure, volume is little, constant current, the constant voltage precision is high, safe, power factor is high LED lamp are with constant current, the constant voltage power supply of safety.
The utility model is to realize like this; Comprise rectification circuit, constant current/constant voltage circuit; Its special feature is that the constant current/constant voltage circuit comprises that microcomputerized control chip, switching tube, optical coupler, constant current comparison circuit, constant voltage comparison circuit, four groups are around same coil windings around core; The output of rectification circuit is connected with first coil windings, the switching tube that are serially connected; The signal input part of switching tube is connected with the control signal output pin of microcomputerized control chip through resistance; The startup power supply input pin of microcomputerized control chip links to each other with the output of rectification circuit through resistance; The second coil windings output links to each other with the working power input pin of microcomputerized control chip through resistance; The signal output of the optical coupling segment signal output of optical coupler links to each other with the control signal input pin of microcomputerized control chip through resistance; The working power input of the optical coupling segment signal output of optical coupler links to each other with the output of rectification circuit through resistance; Power supply two outputs of tertiary coil winding link to each other with the power supply output cathode respectively and link to each other with the negative pole of power supply output; The power supply input of the power supply input of the comparator of constant current comparison circuit, the comparator of constant voltage comparison circuit links to each other with constant voltage source; The negative pole of power supply output cathode, the power supply output current signal input of the comparator of the voltage signal input through resistance and the comparator of constant voltage comparison circuit, constant current comparison circuit respectively links to each other, and the control signal of telecommunication output of the control signal of telecommunication output of the comparator of constant current comparison circuit, the comparator of constant voltage comparison circuit links to each other with the signal of telecommunication input of the luminous component of optical coupler, and the input of the power supply of the luminous component of optical coupler is passed through resistance and linked to each other with the output of the 4th coil windings.During work; The electric energy of rectification circuit outputs on the LED lamp of the negative pole that is connected power supply output cathode, power supply output through first coil windings, the 4th coil windings; Thereby optical coupler is controlled the out-put supply of first coil windings through the switch of microcomputerized control chip controls switching tube; The work of constant current comparison circuit, constant voltage comparison circuit control optical coupler; When the voltage fluctuation of the out-put supply of the negative pole of power supply output cathode, power supply output, through the out-put supply of controlling first coil windings switching time of optical coupler, microcomputerized control chip controls switching tube, to guarantee voltage, the current stabilization of power supply output.
Here, at the negative pole of power supply output cathode, power supply output and connect electric capacity, so that carry out power factor correction.
Control output current voltage for ease and conveniently obtain electric current, voltage signal, the 4th coil windings two ends also connect the resistor group that is made up of several resistance, and the negative pole of source output cathode, power supply output is attempted by on the wherein resistance in the resistor group.
The utility model is owing to adopted inductance to separate power rectifier part and power supply output; And adopt constant current comparison circuit, constant voltage comparison circuit to cooperate optical coupler, microcomputerized control chip, switch controlled output electric energy; Therefore; Have simple in structure, volume is little, constant current, the advantage that the constant voltage precision is high, safe, power factor is high.
Description of drawings:
Fig. 1 is the circuit diagram of the utility model.
Embodiment:
Combine accompanying drawing and embodiment that the utility model is done describes in further detail at present:
The utility model comprises rectification circuit 1, constant current/constant voltage circuit; Its special feature is that the constant current/constant voltage circuit comprises microcomputerized control chip 2, switching tube 3, optical coupler 4, constant current comparison circuit 5, constant voltage comparison circuit 6, four groups around same coil windings 7,8,9,10 around core; The output of rectification circuit 1 is exported a working power VCC1 through the resistor group that resistance R 8, R9, R10 by serial connection constitute; The output of rectification circuit 1 is connected with first coil windings 7, the switching tube 3 that are serially connected; Switching tube 3 passes through grounding through resistance; The signal input part of switching tube 3 through and the diode D7, the resistance R 15 that connect be connected with the control signal output pin of microcomputerized control chip 2; The startup power supply input pin of microcomputerized control chip 2 links to each other with the output of rectification circuit 1 through the resistor group that resistance R 4, R6, R6 by serial connection constitute; Second coil windings, 8 outputs link to each other with the working power input pin of microcomputerized control chip 2 through resistance R 14; The signal output of the optical coupling segment signal output 4a of optical coupler 4 links to each other with the control signal input pin of microcomputerized control chip 2 through resistance R 26; The working power input of the optical coupling segment signal output 4a of optical coupler 4 links to each other with working power VCC1; Power supply two outputs of tertiary coil winding 9 link to each other with power supply output cathode OUT+ respectively and link to each other with the negative pole OUT-of power supply output; The output of the 4th coil windings 10 is connected with the constant voltage power supply circuit 11 of output constant voltage source; Constant voltage power supply circuit 11 output links to each other with the power supply input of the comparator of the power supply input of the comparator of constant current comparison circuit 5, constant voltage comparison circuit 6 respectively; The negative pole OUT-of power supply output cathode OUT+, the power supply output current signal input of the comparator of the voltage signal input through the resistor group that is made up of resistance R 51, R52 and resistance R 46 and the comparator of constant voltage comparison circuit 6, constant current comparison circuit 5 respectively links to each other; The control signal of telecommunication output of the control signal of telecommunication output of the comparator of constant current comparison circuit 5, the comparator of constant voltage comparison circuit 6 links to each other with the signal of telecommunication input of the luminous component 4b of optical coupler 4 through diode D12, D13 respectively, and the power supply input of the luminous component 4b of optical coupler 4 links to each other with the output of the 4th coil windings 10 through resistance R 42.
At the negative pole OUT-of power supply output cathode OUT+, power supply output and meet capacitor C 15, C16, so that carry out power factor correction.Negative pole OUT-in power supply output cathode OUT+, power supply output is connected with filter L4A, L4B.
The 4th coil windings 10 two ends also connect by the resistance R of serial connection, the resistor group that R37 constitutes, resistance R by and the resistance R 34, the R35 that connect constitute, the negative pole OUT-of power supply output cathode OUT+, power supply output is attempted by on the wherein resistance R 37 in the resistor group.
Claims (4)
1. a LED lamp is with safe constant current, constant voltage power supply; Comprise rectification circuit, constant current/constant voltage circuit; It is characterized in that the constant current/constant voltage circuit comprises that microcomputerized control chip, switching tube, optical coupler, constant current comparison circuit, constant voltage comparison circuit, four groups are around same coil windings around core; The output of rectification circuit is connected with first coil windings, the switching tube that are serially connected; The signal input part of switching tube is connected with the control signal output pin of microcomputerized control chip through resistance; The startup power supply input pin of microcomputerized control chip links to each other with the output of rectification circuit through resistance; The second coil windings output links to each other with the working power input pin of microcomputerized control chip through resistance; The signal output of the optical coupling segment signal output of optical coupler links to each other with the control signal input pin of microcomputerized control chip through resistance; The working power input of the optical coupling segment signal output of optical coupler links to each other with the output of rectification circuit through resistance; Power supply two outputs of tertiary coil winding link to each other with the power supply output cathode respectively and link to each other with the negative pole of power supply output; The power supply input of the power supply input of the comparator of constant current comparison circuit, the comparator of constant voltage comparison circuit links to each other with constant voltage source; The negative pole of power supply output cathode, the power supply output current signal input of the comparator of the voltage signal input through resistance and the comparator of constant voltage comparison circuit, constant current comparison circuit respectively links to each other, and the control signal of telecommunication output of the control signal of telecommunication output of the comparator of constant current comparison circuit, the comparator of constant voltage comparison circuit links to each other with the signal of telecommunication input of the luminous component of optical coupler, and the input of the power supply of the luminous component of optical coupler is passed through resistance and linked to each other with the output of the 4th coil windings.
2. LED lamp according to claim 1 is characterized in that the negative pole of exporting at power supply output cathode, power supply and connects electric capacity with constant current, the constant voltage power supply of safety.
3. LED lamp according to claim 1 and 2 is characterized in that with constant current, the constant voltage power supply of safety the output of the 4th coil windings is connected with the constant voltage power supply circuit of output constant voltage source.
4. LED lamp according to claim 3 is with constant current, the constant voltage power supply of safety; It is characterized in that the 4th coil windings two ends and connect the resistor group that constitutes by several resistance that the negative pole of source output cathode, power supply output is attempted by on the wherein resistance in the resistor group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201941748U CN202121832U (en) | 2011-06-10 | 2011-06-10 | Safe power supply with constant current and constant voltage for LED light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201941748U CN202121832U (en) | 2011-06-10 | 2011-06-10 | Safe power supply with constant current and constant voltage for LED light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202121832U true CN202121832U (en) | 2012-01-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201941748U Expired - Lifetime CN202121832U (en) | 2011-06-10 | 2011-06-10 | Safe power supply with constant current and constant voltage for LED light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202121832U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322803A (en) * | 2015-11-02 | 2016-02-10 | 深圳创维－Rgb电子有限公司 | Constant-voltage and constant-current synchronous output power supply and television |
-
2011
- 2011-06-10 CN CN2011201941748U patent/CN202121832U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322803A (en) * | 2015-11-02 | 2016-02-10 | 深圳创维－Rgb电子有限公司 | Constant-voltage and constant-current synchronous output power supply and television |
| CN105322803B (en) * | 2015-11-02 | 2018-03-06 | 深圳创维－Rgb电子有限公司 | Constant pressure and flow synchronism output power supply and television set |
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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 |
Owner name: GUANGDONG KEGU POWER CO., LTD. Free format text: FORMER NAME: FOSHAN SOUTH SEA KEGU POWER ELECTRONICS CO LTD |
|
| CP03 | Change of name, title or address |
Address after: 528200, Guangdong City, Foshan Province Nanhai District lion town Shishan science and Technology Industrial Park A District Science and technology Avenue East 39 (workshop A) on the third floor Patentee after: Guangdong Kegu Power Co., Ltd. Address before: 528200 A, No. 39, science Avenue East, A Industrial Zone, Nanhai District, Guangdong, Foshan, Shishan Patentee before: Foshan Kegu Power Electronics Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 528000, Guangdong City, Foshan Province Nanhai District lion town Shishan science and Technology Industrial Park A District Science and technology Avenue East 39 (workshop A) on the third floor Patentee after: GUANGDONG KEGU POWER ELECTRONICS CO., LTD. Address before: 528200, Guangdong City, Foshan Province Nanhai District lion town Shishan science and Technology Industrial Park A District Science and technology Avenue East 39 (workshop A) on the third floor Patentee before: Guangdong Kegu Power Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120118 |
|
| CX01 | Expiry of patent term |