CN204103770U - A kind of mobile phone small-power switching power-supply circuit - Google Patents
A kind of mobile phone small-power switching power-supply circuit Download PDFInfo
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- CN204103770U CN204103770U CN201420599844.8U CN201420599844U CN204103770U CN 204103770 U CN204103770 U CN 204103770U CN 201420599844 U CN201420599844 U CN 201420599844U CN 204103770 U CN204103770 U CN 204103770U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a kind of mobile phone small-power switching power-supply circuit, comprise current rectifying and wave filtering circuit, LC filter circuit, DC/DC converter circuit and control circuit of duty ratio, current rectifying and wave filtering circuit comprises rectifier bridge Q, resistance R2, resistance R1 and electric capacity C1, LC filter circuit comprises inductance L 1 and electric capacity C2, DC/DC converter circuit comprises transformer T and diode D5, and control circuit of duty ratio comprises chip U1, electric capacity C15 and electric capacity C16.The Energy control technology of the multiple advanced persons such as the control of the utility model application transition mode Active Power Factor Correction, quasi-resonance frequency-converter power isolated variable and synchronous rectification, greatly reduce the power supply energy loss of the portable sets such as mobile phone, improve the stand-by time of the portable sets such as mobile phone.
Description
Technical field
The utility model relates to a kind of switching power circuit, specifically a kind of mobile phone small-power switching power-supply circuit.
Background technology
Small-power switching power-supply is with its many excellent performance, be used widely at many electronic products such as monitoring instrument instrument, communication portable equipment, when battery technology does not have large breakthrough, people pay close attention to more for the energy efficiency of electronic product, and low-power consumption, high efficiency green model power supply have become the focus of the compact power technical research such as mobile phone.
Utility model content
The purpose of this utility model is the mobile phone small-power switching power-supply circuit providing a kind of low-power consumption, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of mobile phone small-power switching power-supply circuit, comprise current rectifying and wave filtering circuit, LC filter circuit, DC/DC converter circuit and control circuit of duty ratio, described current rectifying and wave filtering circuit comprises rectifier bridge Q, resistance R2, resistance R1 and electric capacity C1, described LC filter circuit comprises inductance L 1 and electric capacity C2, described DC/DC converter circuit comprises transformer T and diode D5, and described control circuit of duty ratio comprises chip U1, electric capacity C15 and electric capacity C16.
Described resistance R2 connects fuse FR respectively, electric capacity C1 and rectifier bridge Q pin 2, resistance R2 other end contact resistance R1 respectively, the electric capacity C1 other end and rectifier bridge Q pin 4, the described fuse FR other end connects input A end, the described resistance R1 other end connects input B end, described rectifier bridge Q pin 1 connects electric capacity C2 and electric capacity C3 and ground connection respectively, rectifier bridge Q pin 2 connects the electric capacity C2 other end and inductance L 1 respectively, and inductance L 1 other end connects the electric capacity C3 other end respectively, electric capacity C4, resistance R3, diode D5 positive pole and transformer T coil L4, the described electric capacity C4 other end is the contact resistance R3 other end respectively, diode D5 negative pole and diode D6 negative pole, the described transformer T coil L4 other end connects chip U1 pin 4 respectively, chip U1 pin 5 and diode D6 positive pole, described chip U1 pin 3 is contact resistance R16 ~ R19 and chip U1 pin 6 respectively, and described chip U1 pin 2 connects electric capacity C17 and photoelectrical coupler U2 pin 1 respectively, and the described electric capacity C17 other end connects electric capacity C16 respectively, electric capacity C15, chip U1 pin 8, electric capacity C14, electric capacity C13 and inductance L 3 also ground connection, the described electric capacity C16 other end connects the electric capacity C15 other end and chip U1 pin 1 respectively, described inductance L 3 other end connects diode D11 positive pole, diode D11 negative pole respectively contact resistance R14 and resistance R15, the resistance R15 other end connects the electric capacity C13 other end respectively, the electric capacity C14 other end and chip U1 pin 7, the described resistance R16 other end is contact resistance R17 ~ R19 other end and photoelectrical coupler U2 pin 2 also ground connection respectively, photoelectrical coupler U2 pin 3 respectively contact resistance R11 and resistance R12, the resistance R11 other end connects photoelectrical coupler U2 pin 4 respectively, the K pole of electric capacity C11 and controllable accurate source of stable pressure TL431, the R pole contact resistance R10 respectively of controllable accurate source of stable pressure TL431, resistance R9, resistance R8 and electric capacity C10, the described resistance R10 other end connects the electric capacity C11 other end, and the described resistance R9 other end connects the A pole of controllable accurate source of stable pressure TL431 and diode D12 positive pole and ground connection respectively, and described diode D12 negative pole connects respectively and exports C end, resistance R7, diode D9 positive pole, the resistance R8 other end, the electric capacity C10 other end, resistance R5, electric capacity C9 and inductance L 2, inductance L 2 other end connects electric capacity C7 respectively, electric capacity C8, electric capacity C5, electric capacity C6, diode D7 negative pole, diode D8 negative pole, resistance R13 and diode D10 negative pole, diode D10 positive pole is the contact resistance R13 other end and the resistance R12 other end respectively, and the described electric capacity C5 other end connects the electric capacity C6 other end and resistance R4 respectively, and the resistance R4 other end connects diode D7 positive pole respectively, diode D8 positive pole and transformer T coil L5, the transformer T coil L5 other end connects ground capacity C12 respectively, the electric capacity C7 other end, the electric capacity C8 other end, the electric capacity C9 other end, the resistance R5 other end, resistance R6, the resistance R7 other end and output D end, the described resistance R6 other end connects diode D9 negative pole.
As further program of the utility model: described chip U1 model is ICE3A0565, described photoelectrical coupler U2 model is PC817D.
As further program of the utility model: described electric capacity C12 is for reducing Conducted EMI and noise.
As the utility model further scheme: the RDC clamp of described electric capacity C4, resistance R3 and diode D6 composition is for absorbing the leakage inductance energy of transformer T in transferring energy process and reducing Conducted EMI.
Compared with prior art, the beneficial effects of the utility model are: the Energy control technology of the multiple advanced persons such as the control of the utility model application transition mode Active Power Factor Correction, quasi-resonance frequency-converter power isolated variable and synchronous rectification, greatly reduce the power supply energy loss of the portable sets such as mobile phone, improve the stand-by time of the portable sets such as mobile phone.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of mobile phone small-power switching power-supply circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of mobile phone small-power switching power-supply circuit, comprise current rectifying and wave filtering circuit, LC filter circuit, DC/DC converter circuit and control circuit of duty ratio, current rectifying and wave filtering circuit comprises rectifier bridge Q, resistance R2, resistance R1 and electric capacity C1, LC filter circuit comprises inductance L 1 and electric capacity C2, DC/DC converter circuit comprises transformer T and diode D5, and control circuit of duty ratio comprises chip U1, electric capacity C15 and electric capacity C16.
Resistance R2 connects fuse FR respectively, electric capacity C1 and rectifier bridge Q pin 2, resistance R2 other end contact resistance R1 respectively, the electric capacity C1 other end and rectifier bridge Q pin 4, the fuse FR other end connects input A end, the resistance R1 other end connects input B end, rectifier bridge Q pin 1 connects electric capacity C2 and electric capacity C3 and ground connection respectively, rectifier bridge Q pin 2 connects the electric capacity C2 other end and inductance L 1 respectively, and inductance L 1 other end connects the electric capacity C3 other end respectively, electric capacity C4, resistance R3, diode D5 positive pole and transformer T coil L4, the electric capacity C4 other end is the contact resistance R3 other end respectively, diode D5 negative pole and diode D6 negative pole, the transformer T coil L4 other end connects chip U1 pin 4 respectively, chip U1 pin 5 and diode D6 positive pole, chip U1 pin 3 distinguishes contact resistance R16 ~ R19 and chip U1 pin 6, chip U1 pin 2 connects electric capacity C17 respectively and photoelectrical coupler U2 pin 1, the electric capacity C17 other end connects electric capacity C16 respectively, electric capacity C15, chip U1 pin 8, electric capacity C14, electric capacity C13 and inductance L 3 also ground connection, the electric capacity C16 other end connects the electric capacity C15 other end and chip U1 pin 1 respectively, inductance L 3 other end connects diode D11 positive pole, and diode D11 negative pole respectively contact resistance R14 and resistance R15, the resistance R15 other end connects the electric capacity C13 other end respectively, the electric capacity C14 other end and chip U1 pin 7, the resistance R16 other end is contact resistance R17 ~ R19 other end and photoelectrical coupler U2 pin 2 also ground connection respectively, photoelectrical coupler U2 pin 3 respectively contact resistance R11 and resistance R12, the resistance R11 other end connects photoelectrical coupler U2 pin 4 respectively, the K pole of electric capacity C11 and controllable accurate source of stable pressure TL431, the R pole contact resistance R10 respectively of controllable accurate source of stable pressure TL431, resistance R9, resistance R8 and electric capacity C10, the resistance R10 other end connects the electric capacity C11 other end, and the resistance R9 other end connects the A pole of controllable accurate source of stable pressure TL431 and diode D12 positive pole and ground connection respectively, and diode D12 negative pole connects respectively and exports C end, resistance R7, diode D9 positive pole, the resistance R8 other end, the electric capacity C10 other end, resistance R5, electric capacity C9 and inductance L 2, inductance L 2 other end connects electric capacity C7 respectively, electric capacity C8, electric capacity C5, electric capacity C6, diode D7 negative pole, diode D8 negative pole, resistance R13 and diode D10 negative pole, diode D10 positive pole is the contact resistance R13 other end and the resistance R12 other end respectively, and the electric capacity C5 other end connects the electric capacity C6 other end and resistance R4 respectively, and the resistance R4 other end connects diode D7 positive pole respectively, diode D8 positive pole and transformer T coil L5, the transformer T coil L5 other end connects ground capacity C12 respectively, the electric capacity C7 other end, the electric capacity C8 other end, the electric capacity C9 other end, the resistance R5 other end, resistance R6, the resistance R7 other end and output D end, the resistance R6 other end connects diode D9 negative pole.
Chip U1 model is ICE3A0565, and photoelectrical coupler U2 model is PC817D.
Electric capacity C12 is for reducing Conducted EMI and noise.
The RDC clamp of electric capacity C4, resistance R3 and diode D6 composition is for absorbing the leakage inductance energy of transformer T in transferring energy process and reducing Conducted EMI.
In a switching power circuit, main power consumption is the loss of switch mosfet pipe, the utility model uses chip U1 to be integrated with switch mosfet pipe, so can select a switch mosfet pipe less, the loss of switch mosfet pipe comprises three aspects: 1.MOSFET switching tube conduction loss; Loss between the conducting of 2.MOSFET switching tube turns off; 3.MOSFET switching tube turn-off power loss.So also very important in the conducting resistance of the switch mosfet pipe of chip U1, what loss be made to become is less, then need the conducting resistance of switch mosfet pipe the smaller the better, and in conjunction with actual conditions, the conducting resistance of the chip U1 that the utility model is selected is 4.7 Ω.
For control circuit of duty ratio, as can be seen from circuit, chip U1 pin 7 is auxiliary source pin, and this auxiliary source does not need to add starting resistance, thus can reduce power consumption while making power work.
Claims (4)
1. a mobile phone small-power switching power-supply circuit, comprise current rectifying and wave filtering circuit, LC filter circuit, DC/DC converter circuit and control circuit of duty ratio, it is characterized in that, described current rectifying and wave filtering circuit comprises rectifier bridge Q, resistance R2, resistance R1 and electric capacity C1, described LC filter circuit comprises inductance L 1 and electric capacity C2, described DC/DC converter circuit comprises transformer T and diode D5, and described control circuit of duty ratio comprises chip U1, electric capacity C15 and electric capacity C16;
Described resistance R2 connects fuse FR respectively, electric capacity C1 and rectifier bridge Q pin 2, resistance R2 other end contact resistance R1 respectively, the electric capacity C1 other end and rectifier bridge Q pin 4, the described fuse FR other end connects input A end, the described resistance R1 other end connects input B end, described rectifier bridge Q pin 1 connects electric capacity C2 and electric capacity C3 and ground connection respectively, rectifier bridge Q pin 2 connects the electric capacity C2 other end and inductance L 1 respectively, and inductance L 1 other end connects the electric capacity C3 other end respectively, electric capacity C4, resistance R3, diode D5 positive pole and transformer T coil L4, the described electric capacity C4 other end is the contact resistance R3 other end respectively, diode D5 negative pole and diode D6 negative pole, the described transformer T coil L4 other end connects chip U1 pin 4 respectively, chip U1 pin 5 and diode D6 positive pole, described chip U1 pin 3 is contact resistance R16 ~ R19 and chip U1 pin 6 respectively, and described chip U1 pin 2 connects electric capacity C17 and photoelectrical coupler U2 pin 1 respectively, and the described electric capacity C17 other end connects electric capacity C16 respectively, electric capacity C15, chip U1 pin 8, electric capacity C14, electric capacity C13 and inductance L 3 also ground connection, the described electric capacity C16 other end connects the electric capacity C15 other end and chip U1 pin 1 respectively, described inductance L 3 other end connects diode D11 positive pole, diode D11 negative pole respectively contact resistance R14 and resistance R15, the resistance R15 other end connects the electric capacity C13 other end respectively, the electric capacity C14 other end and chip U1 pin 7, the described resistance R16 other end is contact resistance R17 ~ R19 other end and photoelectrical coupler U2 pin 2 also ground connection respectively, photoelectrical coupler U2 pin 3 respectively contact resistance R11 and resistance R12, the resistance R11 other end connects photoelectrical coupler U2 pin 4 respectively, the K pole of electric capacity C11 and controllable accurate source of stable pressure TL431, the R pole contact resistance R10 respectively of controllable accurate source of stable pressure TL431, resistance R9, resistance R8 and electric capacity C10, the described resistance R10 other end connects the electric capacity C11 other end, and the described resistance R9 other end connects the A pole of controllable accurate source of stable pressure TL431 and diode D12 positive pole and ground connection respectively, and described diode D12 negative pole connects respectively and exports C end, resistance R7, diode D9 positive pole, the resistance R8 other end, the electric capacity C10 other end, resistance R5, electric capacity C9 and inductance L 2, inductance L 2 other end connects electric capacity C7 respectively, electric capacity C8, electric capacity C5, electric capacity C6, diode D7 negative pole, diode D8 negative pole, resistance R13 and diode D10 negative pole, diode D10 positive pole is the contact resistance R13 other end and the resistance R12 other end respectively, and the described electric capacity C5 other end connects the electric capacity C6 other end and resistance R4 respectively, and the resistance R4 other end connects diode D7 positive pole respectively, diode D8 positive pole and transformer T coil L5, the transformer T coil L5 other end connects ground capacity C12 respectively, the electric capacity C7 other end, the electric capacity C8 other end, the electric capacity C9 other end, the resistance R5 other end, resistance R6, the resistance R7 other end and output D end, the described resistance R6 other end connects diode D9 negative pole.
2. mobile phone small-power switching power-supply circuit according to claim 1, is characterized in that, described chip U1 model is ICE3A0565, and described photoelectrical coupler U2 model is PC817D.
3. mobile phone small-power switching power-supply circuit according to claim 1, is characterized in that, described electric capacity C12 is for reducing Conducted EMI and noise.
4. mobile phone small-power switching power-supply circuit according to claim 1, is characterized in that, the RDC clamp of described electric capacity C4, resistance R3 and diode D6 composition is for absorbing the leakage inductance energy of transformer T in transferring energy process and reducing Conducted EMI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420599844.8U CN204103770U (en) | 2014-10-17 | 2014-10-17 | A kind of mobile phone small-power switching power-supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420599844.8U CN204103770U (en) | 2014-10-17 | 2014-10-17 | A kind of mobile phone small-power switching power-supply circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204103770U true CN204103770U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420599844.8U Expired - Fee Related CN204103770U (en) | 2014-10-17 | 2014-10-17 | A kind of mobile phone small-power switching power-supply circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106506656A (en) * | 2016-11-20 | 2017-03-15 | 广西大学 | A kind of data communication system based on electronic information technology |
| CN107241109A (en) * | 2017-07-06 | 2017-10-10 | 郑州靓岛建筑设计有限公司 | A kind of signal processing system |
| CN107292199A (en) * | 2017-05-24 | 2017-10-24 | 上海泰金电子科技有限公司 | A kind of doorway machine safety system |
| CN107341410A (en) * | 2017-05-24 | 2017-11-10 | 上海泰金电子科技有限公司 | A kind of doorway machine safety system |
| TWI788184B (en) * | 2022-01-07 | 2022-12-21 | 偉詮電子股份有限公司 | Power supply with optional pfc, and control method thereof |
-
2014
- 2014-10-17 CN CN201420599844.8U patent/CN204103770U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106506656A (en) * | 2016-11-20 | 2017-03-15 | 广西大学 | A kind of data communication system based on electronic information technology |
| CN107292199A (en) * | 2017-05-24 | 2017-10-24 | 上海泰金电子科技有限公司 | A kind of doorway machine safety system |
| CN107341410A (en) * | 2017-05-24 | 2017-11-10 | 上海泰金电子科技有限公司 | A kind of doorway machine safety system |
| CN107241109A (en) * | 2017-07-06 | 2017-10-10 | 郑州靓岛建筑设计有限公司 | A kind of signal processing system |
| TWI788184B (en) * | 2022-01-07 | 2022-12-21 | 偉詮電子股份有限公司 | Power supply with optional pfc, and control method thereof |
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| Date | Code | Title | Description |
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| 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: 20150114 Termination date: 20171017 |
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| CF01 | Termination of patent right due to non-payment of annual fee |