CN205304637U - Communication power supply synchronous rectification circuit - Google Patents
Communication power supply synchronous rectification circuit Download PDFInfo
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- CN205304637U CN205304637U CN201521127702.2U CN201521127702U CN205304637U CN 205304637 U CN205304637 U CN 205304637U CN 201521127702 U CN201521127702 U CN 201521127702U CN 205304637 U CN205304637 U CN 205304637U
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Abstract
The utility model discloses a communication power supply synchronous rectification circuit, manage Q2, bilateral diode Z1 and bilateral diode Z2 including transformer T, resistance R1, electric capacity C1, MOS pipe Q1, MOS, transformer T coil L1 connects 220V alternating current both ends respectively in both ends, transformer T coil L2 one end is connecting resistance R1 respectively, MOS pipe Q1's the D utmost point, inductance L4, electric capacity C2 and resistance R6, electric capacity C1 is connected to the resistance R1 other end, MOS pipe Q1's G utmost point connecting resistance R2, the resistance R2 other end is connecting resistance R3 respectively, bilateral diode Z1, resistance R4 and electric capacity C3, the electric capacity C3 other end and resistance R9 are connected respectively to the resistance R4 other end. The utility model discloses communication power supply synchronous rectification circuit adopts two MOS control oil pipes, and cooperation outlying circuit design can effectively accomplish synchronous Rectifier control, and circuit structure is simple, and is with low costs, small, and stability is high.
Description
Technical field
This utility model relates to a kind of rectification circuit, specifically a kind of communication power supply circuit of synchronous rectification.
Background technology
The development of electronic technology so that the running voltage of circuit is more and more lower, electric current is increasing. Low voltage operating advantageously reduces the overall power consumption of circuit, but also proposes a new difficult problem to Power Management Design.
Switching Power Supply is applied widely in the communications field, and the loss of Switching Power Supply is mainly made up of 3 parts: the loss of power switch pipe, the loss of high frequency transformer, the loss of outfan rectifier tube. When low-voltage, High-current output, the conduction voltage drop of commutation diode is higher, and the loss of outfan rectifier tube is especially prominent. Fast recovery diode (FRD) or Ultrafast recovery diode (SRD) are up to 1.0��1.2V, even if adopting the Schottky diode (SBD) of low pressure drop, also producing the pressure drop of about 0.6V, this results in rectifier loss and increases, and power-efficient reduces.
Synchronous rectification is the special power MOSFET adopting on state resistance extremely low, replaces commutation diode to reduce a new technique of rectifier loss. It can be greatly improved the efficiency of DC/DC changer and be absent from the dead zone voltage caused by Schottky barrier voltage.
Utility model content
The purpose of this utility model is in that to provide a kind of communication power supply circuit of synchronous rectification, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, this utility model provides following technical scheme:
A kind of communication power supply circuit of synchronous rectification, including transformator T, resistance R1, electric capacity C1, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, bilateral diode Z1 and bilateral diode Z2, described transformator T coil L1 two ends connect 220V alternating current two ends respectively, and transformator T coil L2 one end connects resistance R1 respectively, the D pole of metal-oxide-semiconductor Q1, inductance L4, electric capacity C2 and resistance R6, the resistance R1 other end connects the G pole of electric capacity C1, metal-oxide-semiconductor Q1 and connects resistance R2, and the resistance R2 other end connects resistance R3 respectively, bilateral diode Z1, resistance R4 and electric capacity C3, the resistance R4 other end connects the electric capacity C3 other end and resistance R9 respectively, and the resistance R9 other end connects electric capacity C4, and the electric capacity C4 other end connects the electric capacity C1 other end respectively, the S pole of metal-oxide-semiconductor Q1, the resistance R3 other end, the bilateral diode Z1 other end, bilateral diode Z2, resistance R8, the S pole of metal-oxide-semiconductor Q2, electric capacity C6, electric capacity C7 and electric capacity C8 ground connection, the bilateral diode Z2 other end connects resistance R5 respectively, resistance R6, resistance R7 and the resistance R8 other end, the resistance R7 other end connects the G pole of metal-oxide-semiconductor Q2, the D pole connection transformer T coil L2 other end of metal-oxide-semiconductor Q2, the resistance R5 other end connects the resistance R2 other end, the described inductance L4 other end connects the electric capacity C6 other end and inductance L3 respectively, and the inductance L3 other end connects the electric capacity C7 other end respectively, the electric capacity C8 other end and output end vo.
As further program of the utility model: described metal-oxide-semiconductor Q1 is continued flow tube.
As this utility model further scheme: described metal-oxide-semiconductor Q2 is rectifier tube.
Compared with prior art, the beneficial effects of the utility model are: this utility model communication power supply circuit of synchronous rectification adopts two metal-oxide-semiconductors to control, and coordinates peripheral circuit design, efficiently accomplishing synchronous rectification control, circuit structure is simple, and cost is low, volume is little, and stability is high.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of communication power supply circuit of synchronous rectification.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments. Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.
Referring to Fig. 1, in this utility model embodiment, a kind of communication power supply circuit of synchronous rectification, including transformator T, resistance R1, electric capacity C1, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, bilateral diode Z1 and bilateral diode Z2, described transformator T coil L1 two ends connect 220V alternating current two ends respectively, and transformator T coil L2 one end connects resistance R1 respectively, the D pole of metal-oxide-semiconductor Q1, inductance L4, electric capacity C2 and resistance R6, the resistance R1 other end connects the G pole of electric capacity C1, metal-oxide-semiconductor Q1 and connects resistance R2, and the resistance R2 other end connects resistance R3 respectively, bilateral diode Z1, resistance R4 and electric capacity C3, the resistance R4 other end connects the electric capacity C3 other end and resistance R9 respectively, and the resistance R9 other end connects electric capacity C4, and the electric capacity C4 other end connects the electric capacity C1 other end respectively, the S pole of metal-oxide-semiconductor Q1, the resistance R3 other end, the bilateral diode Z1 other end, bilateral diode Z2, resistance R8, the S pole of metal-oxide-semiconductor Q2, electric capacity C6, electric capacity C7 and electric capacity C8 ground connection, the bilateral diode Z2 other end connects resistance R5 respectively, resistance R6, resistance R7 and the resistance R8 other end, the resistance R7 other end connects the G pole of metal-oxide-semiconductor Q2, the D pole connection transformer T coil L2 other end of metal-oxide-semiconductor Q2, the resistance R5 other end connects the resistance R2 other end, the described inductance L4 other end connects the electric capacity C6 other end and inductance L3 respectively, and the inductance L3 other end connects the electric capacity C7 other end respectively, the electric capacity C8 other end and output end vo, described metal-oxide-semiconductor Q1 is continued flow tube, described metal-oxide-semiconductor Q2 is rectifier tube.
Operation principle of the present utility model is: refer to Fig. 1, and when transformator T coil L2 upper end is timing, electric current makes Q2 turn on through C2, R5, R6, R7, and circuit constitutes loop, and Q2 is rectifier tube, and Q1 grid ends owing to being in reverse-biased; When transformator T coil L2 lower end is timing, electric current makes Q1 turn on through C3, R4, R2, Q1 is continued flow tube, Q2 grid ends owing to being in reverse-biased, it is achieved thereby that synchronous rectification, L4 is afterflow inductance, and C6, L3, C7 form pi type filter, R1, C1, R9, C4 form Despiking circuit, improve the capacity of resisting disturbance of circuit.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and when without departing substantially from spirit of the present utility model or basic feature, it is possible to realize this utility model in other specific forms. Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in this utility model. Any accompanying drawing labelling in claim should be considered as the claim that restriction is involved.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, and the technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. a communication power supply circuit of synchronous rectification, including transformator T, resistance R1, electric capacity C1, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, bilateral diode Z1 and bilateral diode Z2, it is characterised in that described transformator T coil L1 two ends connect 220V alternating current two ends respectively, and transformator T coil L2 one end connects resistance R1 respectively, the D pole of metal-oxide-semiconductor Q1, inductance L4, electric capacity C2 and resistance R6, the resistance R1 other end connects the G pole of electric capacity C1, metal-oxide-semiconductor Q1 and connects resistance R2, and the resistance R2 other end connects resistance R3 respectively, bilateral diode Z1, resistance R4 and electric capacity C3, the resistance R4 other end connects the electric capacity C3 other end and resistance R9 respectively, and the resistance R9 other end connects electric capacity C4, and the electric capacity C4 other end connects the electric capacity C1 other end respectively, the S pole of metal-oxide-semiconductor Q1, the resistance R3 other end, the bilateral diode Z1 other end, bilateral diode Z2, resistance R8, the S pole of metal-oxide-semiconductor Q2, electric capacity C6, electric capacity C7 and electric capacity C8 ground connection, the bilateral diode Z2 other end connects resistance R5 respectively, resistance R6, resistance R7 and the resistance R8 other end, the resistance R7 other end connects the G pole of metal-oxide-semiconductor Q2, the D pole connection transformer T coil L2 other end of metal-oxide-semiconductor Q2, the resistance R5 other end connects the resistance R2 other end, the described inductance L4 other end connects the electric capacity C6 other end and inductance L3 respectively, and the inductance L3 other end connects the electric capacity C7 other end respectively, the electric capacity C8 other end and output end vo.
2. communication power supply circuit of synchronous rectification according to claim 1, it is characterised in that described metal-oxide-semiconductor Q1 is continued flow tube.
3. communication power supply circuit of synchronous rectification according to claim 1, it is characterised in that described metal-oxide-semiconductor Q2 is rectifier tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521127702.2U CN205304637U (en) | 2015-12-29 | 2015-12-29 | Communication power supply synchronous rectification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521127702.2U CN205304637U (en) | 2015-12-29 | 2015-12-29 | Communication power supply synchronous rectification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205304637U true CN205304637U (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521127702.2U Expired - Fee Related CN205304637U (en) | 2015-12-29 | 2015-12-29 | Communication power supply synchronous rectification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205304637U (en) |
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2015
- 2015-12-29 CN CN201521127702.2U patent/CN205304637U/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 | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Huachun Inventor after: Wang Dongbin Inventor after: Li Xiaofu Inventor before: Chen Peng |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170605 Address after: Dongping Yongping street, Baiyun District of Guangzhou City, the 510080 Guangdong province Sheng field top industrial zone 14 floor Patentee after: Guangzhou Fude Electrical Co. Ltd. Address before: 100176, Beijing, Beijing Economic Development Zone, South Street, No. 1, 1, building 3, 3016, Daxing District Patentee before: BEIJING CHUANGXINJI TECHNOLOGY DEVELOPMENT CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20171229 |