CN201854199U - Energy feedback buffer circuit of power supply - Google Patents
Energy feedback buffer circuit of power supply Download PDFInfo
- Publication number
- CN201854199U CN201854199U CN2010205675119U CN201020567511U CN201854199U CN 201854199 U CN201854199 U CN 201854199U CN 2010205675119 U CN2010205675119 U CN 2010205675119U CN 201020567511 U CN201020567511 U CN 201020567511U CN 201854199 U CN201854199 U CN 201854199U
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- power supply
- diode
- capacitor
- coil
- buffer circuit
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Abstract
The utility model relates to an energy feedback buffer circuit of a power supply, which belongs to the technical field of electronics, and is characterized in that: one end of a diode I is connected with the power supply, and the other end of the diode I is connected with a coil I; the other end of the coil I is connected with the other end of the power supply through a diode II, and one of a capacitor is connected between the diode I and the coil I; the other end of the capacitor I is connected with a transformer, and the other end of the transformer is connected with the power supply; one end of a capacitor III is connected with one end of a switching tube, and the other end of the capacitor III is connected with a resistance; the other end of the resistance is connected to the other end of the switching tube and is connected with the power supply, and a diode III and a diode V are connected to a rectifier circuit; and a coil II and a capacitor II are connected to a filter circuit. In the utility model, the volume and the weight of the power supply can be effectively reduced, the switching frequency is improved, and the reliability of the power supply is improved. The energy feedback buffer circuit has very wide application prospects.
Description
Technical field
The utility model is a kind of power supply energy feedback buffer circuit, belongs to electronic technology field.
Background technology
Development along with power electronic technology, Switching Power Supply is just trending towards miniaturization and lightweight, in order to reduce the volume and weight of power supply, improving switching frequency is the most feasible method, yet, along with frequency improves, switching loss is also big more, has brought the low and big serious problems of generating heat of efficient, owing to be operated under the high frequency state, the switch transformer leakage inductance, parasitic parameters such as distributed capacitance can not be ignored.Bring threat for the reliability of power supply, therefore need the various bufferings of design to absorb circuit it is suppressed.The design realizes the buffer circuit superpotential energy that dissipates, and the energy back circuit is with in most of energy back telegram in reply source.
Summary of the invention
The purpose of this utility model is to provide a kind of power supply energy feedback buffer circuit, thereby overcomes the high loss that brings along with the raising of Switching Power Supply frequency in the prior art, problems such as poor efficiency, the reliability of raising Switching Power Supply.
To achieve these goals, the utility model adopts following technical scheme:
A kind of power supply energy feedback buffer circuit, the termination power of diode I, the other end wiring circle I of diode I, the other end of coil I connects the other end of power supply by diode I; One of electric capacity terminates between diode I and the coil I, and the other end of capacitor I is connected on transformer, and the other end of transformer is connected on power supply; Capacitor I II one terminates at switching tube 12 1 ends, and capacitor I II other end connecting resistance, the resistance other end are received the other end of switching tube 12 and received on the power supply; Diode I I and diode V are connected in the rectification circuit, and coil II and capacitor I I are connected in the filter circuit.
Coil I is the winding that transformer is added, the energy of leakage inductance temporarily is stored in the capacitor I, the switching tube base stage connects the control signal end of controller, when the switching tube conducting, transformer elementary become energy recovering circuit, capacitor I II resistance constitutes buffer circuit, when switching tube turn-offs, collector voltage begins to rise, and capacitor I II has limited the speed that collector voltage rises, and the colleague has reduced the overlapping of last up voltage and drop-out current, thereby reduced the loss of switching tube, and before next switch turn-offed, the tele-release that capacitor I II must will be full of again was intact, had reached the purpose of buffering.
The utility model compared with prior art has following advantage:
1, the utility model can effectively reduce the volume and weight of power supply, improves switching frequency, improves the reliable rows of power supply;
2, the utlity model has very application prospects.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with Fig. 1 the utility model is described in detail: a kind of power supply energy feedback buffer circuit, the termination power of diode I 1, the other end wiring circle I 5 of diode I 1, the other end of coil I 5 connects the other end of power supply by diode I 2; One of electric capacity 8 terminates between diode I 1 and the coil I 5, and the other end of capacitor I 8 is connected on transformer 6, and the other end of transformer 6 is connected on power supply; Capacitor I II 10 1 terminates at switching tube 12 1 ends, capacitor I II 10 other end connecting resistances 11, and resistance 11 other ends are received the other end of switching tube 12 and are received on the power supply; Diode I I 3 and diode V4 are connected in the rectification circuit, and coil II 7 and capacitor I I 9 are connected in the filter circuit.
Coil I 5 is windings that transformer 6 is added, the energy of leakage inductance temporarily is stored in the capacitor I 8, the switching tube base stage connects the control signal end of controller, when switching tube 12 conductings, transformer 6 elementary become energy recovering circuit, capacitor I II 10 resistance 11 constitute buffer circuit, when switching tube 12 turn-offs, collector voltage begins to rise, and capacitor I II 10 has limited the speed that collector voltage rises, and the colleague has reduced the overlapping of last up voltage and drop-out current, thereby reduced the loss of switching tube 12, and before next switch turn-offed, the tele-release that capacitor I II 10 must will be full of again was intact, had reached the purpose of buffering.
Claims (1)
1. power supply energy feedback buffer circuit is characterized in that: the termination power of diode I (1), and the other end wiring circle I (5) of diode I (1), the other end of coil I (5) connect the other end of power supply by diode I (2); One of electric capacity (8) terminates between diode I (1) and the coil I (5), and the other end of capacitor I (8) is connected on transformer (6), and the other end of transformer (6) is connected on power supply; Capacitor I II (10) one terminates at switching tube (12) one ends, capacitor I II (10) other end connecting resistance (11), and resistance (11) other end is received the other end of switching tube (12) and is received on the power supply; Diode I I (3) and diode V (4) are connected in the rectification circuit, and coil II (7) and capacitor I I (9) are connected in the filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205675119U CN201854199U (en) | 2010-10-19 | 2010-10-19 | Energy feedback buffer circuit of power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205675119U CN201854199U (en) | 2010-10-19 | 2010-10-19 | Energy feedback buffer circuit of power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201854199U true CN201854199U (en) | 2011-06-01 |
Family
ID=44096579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205675119U Expired - Fee Related CN201854199U (en) | 2010-10-19 | 2010-10-19 | Energy feedback buffer circuit of power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201854199U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429832A (en) * | 2019-08-06 | 2019-11-08 | 深圳创维－Rgb电子有限公司 | A kind of switching power circuit and television set |
-
2010
- 2010-10-19 CN CN2010205675119U patent/CN201854199U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429832A (en) * | 2019-08-06 | 2019-11-08 | 深圳创维－Rgb电子有限公司 | A kind of switching power circuit and television set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20111019 |