CN202103908U - Down lamp constant current switch power supply - Google Patents
Down lamp constant current switch power supply Download PDFInfo
- Publication number
- CN202103908U CN202103908U CN2011201938675U CN201120193867U CN202103908U CN 202103908 U CN202103908 U CN 202103908U CN 2011201938675 U CN2011201938675 U CN 2011201938675U CN 201120193867 U CN201120193867 U CN 201120193867U CN 202103908 U CN202103908 U CN 202103908U
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- constant current
- power supply
- output
- input
- switch power
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Abstract
The utility model relates to a down lamp constant current switch power supply, which is a single-stage PWM flyback type high PF value high precision constant current constant voltage power supply, wherein the PF value can achieve about 0.97, and the output constant current precision is 1%. The switch power supply comprises an input protection and EMC circuit, an input rectification filter circuit, an SA7527 control module, an EFD25 type high frequency transformer, an output rectification filter circuit, a constant current constant voltage circuit, and a feedback control module. The application of the down lamp constant current switch power supply enables realization of high voltage AC input and low voltage DC output, the input voltage range of the switch power supply is AC 85-265 V, and the switch power supply is suitable to various places with uncertain input voltage, has output-adjustable function, can output high precision constant current and constant voltage, and can supply power for a plurality of different types of LED down lamps.
Description
Technical field
The utility model relates to electrical equipment technical field, the particularly a kind of high constant current accuracy Down lamp of high PF value constant current switch power supply that is used for to the LED power supply.
Technical background
The anti-energizing mode Switching Power Supply of known PWM, the power factor PF value of power supply is very low, and the PF value can only reach about 0.55, and the loss of electrical network is bigger, and the constant current accuracy of power supply is not high.Use this power supply, the LED Down lamp presents bigger demonstration aberration, and the life-span of LED Down lamp is also shorter relatively.
The utility model content
The utility model relates to a kind of Down lamp constant current switch power supply, can reach 1% constant current by output accuracy.It comprises input protection and EMC circuit, input rectifying filter circuit, SA7527 control module, EFD25 type high frequency transformer, output rectifier and filter, constant current constant voltage output circuit, feedback control module.
Shown in accompanying drawing 1:
1. the utility model is wide voltage input, and scope is AC85-265V;
2. voltage converts dc voltage at last through input module;
3. dc voltage is exported corresponding AC voltage through EFD25 type high frequency transformer under SA7527 control;
4. the AC voltage of output is exported with the dc voltage pattern after exporting rectifying and wave-filtering once more;
5. export the dc voltage process constant current constant voltage treatment and supplied LED Down lamp that rectifying and wave-filtering comes out;
6. feedback control circuit is directly controlled final output voltage, electric current.
Description of drawings
Accompanying drawing 1 is the structure principle chart of the utility model
A kind of Down lamp constant current switch power supply enforcement figure that accompanying drawing 2 provides for the utility model enforcement
Embodiment:
The utility model is mainly the power supply of number of different types Down lamp, and wide voltage input is applicable to the occasion that various voltages are indefinite.
Preferred forms, like accompanying drawing 2:
Civil power inserts input terminal 1, input terminal 2, the input terminal 3 of power supply, and lead-out terminal 4, lead-out terminal 5 connect the LED Down lamp.
Claims (5)
1. Down lamp constant current switch power supply, it comprises: input module, control module and output module is characterized in that said input module comprises input protection and EMC circuit, input rectifying filter circuit; Said control module comprises SA7527 control module, EFD25 type high frequency transformer; Said output module comprises output rectifier and filter and constant current constant voltage output circuit, feedback control circuit.Electric energy after the input module conversion is changed under the control module control action and is outputed to output module.
2. a kind of Down lamp constant current switch power supply according to claim 1 is characterized in that, described input protection and EMC circuit, input rectifying filter circuit, EFD25 type high frequency transformer, the series connection of constant current constant voltage output circuit.
3. a kind of Down lamp constant current switch power supply according to claim 1 is characterized in that described SA7527 control module outputs to EFD25 type high frequency transformer, and EFD25 type high frequency transformer is exported control.
4. a kind of Down lamp constant current switch power supply according to claim 1 is characterized in that described feedback control module outputs to the SA7527 control module, and the SA7527 control module is carried out final output loading voltage, output current precision adjusting control.
5. a kind of Down lamp constant current switch power supply according to claim 1 is characterized in that, the output of wide voltage input high precision constant current, and it is AC85-265V that input module can insert voltage, output accuracy reaches 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201938675U CN202103908U (en) | 2011-05-26 | 2011-05-26 | Down lamp constant current switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201938675U CN202103908U (en) | 2011-05-26 | 2011-05-26 | Down lamp constant current switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202103908U true CN202103908U (en) | 2012-01-04 |
Family
ID=45389905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201938675U Expired - Fee Related CN202103908U (en) | 2011-05-26 | 2011-05-26 | Down lamp constant current switch power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202103908U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742820A (en) * | 2013-12-30 | 2014-04-23 | 苏州东山精密制造股份有限公司 | Light-emitting diode (LED) tube lamp |
-
2011
- 2011-05-26 CN CN2011201938675U patent/CN202103908U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742820A (en) * | 2013-12-30 | 2014-04-23 | 苏州东山精密制造股份有限公司 | Light-emitting diode (LED) tube lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Xiamen Leaton Electric Equipment Co.,Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Xiamen Leaton Electric Equipment Co.,Ltd. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20140526 |
|
| EXPY | Termination of patent right or utility model |