CN203289720U - Led embedded power supply circuit - Google Patents
Led embedded power supply circuit Download PDFInfo
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- CN203289720U CN203289720U CN2013203567683U CN201320356768U CN203289720U CN 203289720 U CN203289720 U CN 203289720U CN 2013203567683 U CN2013203567683 U CN 2013203567683U CN 201320356768 U CN201320356768 U CN 201320356768U CN 203289720 U CN203289720 U CN 203289720U
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- rectifying
- wave
- pwm control
- filtering
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Abstract
The utility model relates to a power supply circuit, and especially relates to an LED embedded power supply circuit. The LED embedded power supply circuit comprises a rectification filter input circuit, a power conversion circuit, a PFC circuit, a PWM control circuit, a rectification filter output circuit and a feedback circuit. The rectification filter input circuit, the power conversion circuit and the rectification filter output circuit are connected orderly, the power conversion circuit, the PFC circuit, the PWM control circuit, the rectification filter output circuit and the feedback circuit are connected orderly, and the PFC circuit and the PWM control circuit are integrated on an integrated circuit. The LED embedded power supply circuit also comprises a surge protection circuit, an input voltage protection circuit and an output protection circuit. The surge protection circuit is connected with a rectification filter input module, the input voltage protection circuit is connected with the rectification filter input module and a PWM control module separately, and the output protection circuit is connected with a rectification filter output module and the PWM control circuit separately. By the LED embedded power supply circuit, the safety performance of LED lamps are higher.
Description
Technical field
The utility model relates to a kind of power circuit, relates in particular to a kind of LED embedded-type electric source circuit.
Background technology
LED has the advantages such as environmental protection, energy-conservation, life-span length, high brightness, and LED, as a kind of novel green light source product, must be the trend of future development, and 21st century will enter the novel illumination light source epoch take LED as representative.LED embedded-type electric source circuit is arranged in the LED lamp by modularization, and the LED embedded-type electric source circuit security performance of prior art is not fine, and whole like this LED lamp is lower useful life.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of higher LED embedded-type electric source circuit of security performance that has is provided.
the technical scheme that the utility model adopts is: a kind of LED embedded-type electric source circuit, comprise the rectifying and wave-filtering input circuit, circuit for power conversion, pfc circuit, pwm control circuit, rectifying and wave-filtering output circuit and feedback circuit, described rectifying and wave-filtering input circuit, circuit for power conversion and rectifying and wave-filtering output circuit connect successively, described circuit for power conversion, pfc circuit, pwm control circuit, feedback circuit and rectifying and wave-filtering output circuit connect successively, and described pfc circuit and pwm control circuit are integrated to be arranged on an integrated circuit, it also comprises the protective circuit of surging, input voltage protection circuit and output protection circuit, the described protective circuit of surging is connected with the rectifying and wave-filtering input module, described input voltage protection circuit is connected with rectifying and wave-filtering input module and PWM control module respectively, described output protection circuit is connected with rectifying and wave-filtering output module and pwm control circuit respectively.
Adopt above structure compared with prior art; the utlity model has following advantage: the safety that a plurality of protective circuits can better the protection power source circuit is set; namely can better protect the embedded ceiling light of the LED that is attached thereto; make the power circuit fail safe of the embedded ceiling light of LED higher, useful life is longer.
As preferably, described output protection circuit comprises current foldback circuit and overvoltage crowbar.The more comprehensive of protection is set like this.
As preferably, described surging between protective circuit and rectifying and wave-filtering input circuit also is provided with an EMI filter circuit.Filter effect is better like this.
Description of drawings
Fig. 1 is that the circuit of the utility model LED embedded-type electric source circuit connects block diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further, but the utility model is not limited only to following embodiment.
as shown in the figure: a kind of LED embedded-type electric source circuit, comprise the rectifying and wave-filtering input circuit, circuit for power conversion, pfc circuit, pwm control circuit, rectifying and wave-filtering output circuit and feedback circuit, described rectifying and wave-filtering input circuit, circuit for power conversion and rectifying and wave-filtering output circuit connect successively, described circuit for power conversion, pfc circuit, pwm control circuit, feedback circuit and rectifying and wave-filtering output circuit connect successively, and described pfc circuit and pwm control circuit are integrated to be arranged on an integrated circuit, it also comprises the protective circuit of surging, input voltage protection circuit and output protection circuit, the described protective circuit of surging is connected with the rectifying and wave-filtering input module, described input voltage protection circuit is connected with rectifying and wave-filtering input module and PWM control module respectively, described output protection circuit is connected with rectifying and wave-filtering output module and pwm control circuit respectively.The model of an integrated circuit of described pfc circuit and the integrated setting of pwm control circuit is OB2298.
Described output protection circuit comprises current foldback circuit and overvoltage crowbar.
Described surging between protective circuit and rectifying and wave-filtering input circuit also is provided with an EMI filter circuit.
Claims (3)
1. LED embedded-type electric source circuit, comprise the rectifying and wave-filtering input circuit, circuit for power conversion, pfc circuit, pwm control circuit, rectifying and wave-filtering output circuit and feedback circuit, described rectifying and wave-filtering input circuit, circuit for power conversion and rectifying and wave-filtering output circuit connect successively, described circuit for power conversion, pfc circuit, pwm control circuit, feedback circuit and rectifying and wave-filtering output circuit connect successively, and described pfc circuit and pwm control circuit are integrated to be arranged on an integrated circuit, it is characterized in that: it also comprises the protective circuit of surging, input voltage protection circuit and output protection circuit, the described protective circuit of surging is connected with the rectifying and wave-filtering input module, described input voltage protection circuit is connected with rectifying and wave-filtering input module and PWM control module respectively, described output protection circuit is connected with rectifying and wave-filtering output module and pwm control circuit respectively.
2. LED embedded-type electric source circuit according to claim 1, it is characterized in that: described output protection circuit comprises current foldback circuit and overvoltage crowbar.
3. LED embedded-type electric source circuit according to claim 1, it is characterized in that: described surging between protective circuit and rectifying and wave-filtering input circuit also is provided with an EMI filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203567683U CN203289720U (en) | 2013-06-21 | 2013-06-21 | Led embedded power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203567683U CN203289720U (en) | 2013-06-21 | 2013-06-21 | Led embedded power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203289720U true CN203289720U (en) | 2013-11-13 |
Family
ID=49546058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203567683U Expired - Fee Related CN203289720U (en) | 2013-06-21 | 2013-06-21 | Led embedded power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203289720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104602401A (en) * | 2013-12-27 | 2015-05-06 | 谢维哲 | LED lamp tube device similar to fluorescent lamp tube |
-
2013
- 2013-06-21 CN CN2013203567683U patent/CN203289720U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104602401A (en) * | 2013-12-27 | 2015-05-06 | 谢维哲 | LED lamp tube device similar to fluorescent lamp tube |
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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 |
Granted publication date: 20131113 Termination date: 20140621 |
|
| EXPY | Termination of patent right or utility model |