CN201839208U - PFC/PWM two-in-one switching power supply circuit - Google Patents
PFC/PWM two-in-one switching power supply circuit Download PDFInfo
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- CN201839208U CN201839208U CN2010205691179U CN201020569117U CN201839208U CN 201839208 U CN201839208 U CN 201839208U CN 2010205691179 U CN2010205691179 U CN 2010205691179U CN 201020569117 U CN201020569117 U CN 201020569117U CN 201839208 U CN201839208 U CN 201839208U
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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 relates to a PFC (power factor correction)/PWM (pulse-width modulation) two-in-one switching power supply circuit which comprises an EMI (electromagnetic interference) filter circuit, a rectification circuit, a feedback circuit, an output rectification circuit, a quasi resonant switching power supply control chip U1, a high-voltage MOSFET (metal-oxide-semiconductor field effect transistor) Q1, a CBB (polypropylene) capacitor C2, a CBB capacitor C3, an electrolytic capacitor C4, a resistor R6, a resistor R7, a resistor R8, a resistor R10, a high frequency transformer T1, a fast diode D1, a power storage inductor L1 and an output filter LF2. The utility model aims at the application of power supplies of small and medium power, has low output ripple of a two-stage power factor correction structure and low cost of a single-stage structure, and has higher efficiency.
Description
Technical field
The utility model relates to switching power circuit, relates in particular to the two-in-one switching power circuit of a kind of PFC/PWM.
Background technology
Harmonic wave can increase the loss and the heating of electric equipment, reduces reliability.Harmonic wave flows into electrical network also can cause reactive power loss, even the interference communications circuit.So China and a lot of in the world country have formulated standard, the harmonic wave that electric equipment is produced limits.In order to test by harmonic wave, Switching Power Supply that general 75W is above and the above electric lighting of 25W often adopt APFC (Active Power Factor Correction) to add the two-layer configuration of PWM (pulse-width modulation) converter, and output ripple is lower, and cost is higher; The employing that the following electric lighting of 25W has is passive by ripple PFC (power factor correction) correcting circuit, and the employing single-stage that has instead swashs the PFC translation circuit, and cost is lower, but efficient is low during the low-voltage input, and output ripple is also big, has just limited application sometimes.
The utility model content
Therefore, the purpose of this utility model is to provide a kind of PFC/PWM two-in-one switching power circuit.
For achieving the above object, the utility model provides a kind of PFC/PWM two-in-one switching power circuit, and it comprises: EMI filter circuit, rectification circuit, feedback circuit, output rectification circuit, quasi-resonant switching power supply control chip U1, high-voltage MOSFET Q1, CBB capacitor C 2, CBB capacitor C 3, electrochemical capacitor C4, resistance R 6, resistance R 7, resistance R 8, resistance R 10, high frequency transformer T1, fast diode D1, energy storage inductor L1 and output filter LF2; Exchange the head end that input couples the EMI filter circuit, the end of EMI filter circuit couples rectification circuit, the end of rectification circuit also connects the head end of L1 simultaneously through C2 ground connection, the end of L1 connects the head end of C3 and the positive pole of D1 simultaneously, the end of C3 connects a pin of T1 input and the drain electrode of Q1 simultaneously, the negative pole of D1 connects the positive pole of C4, the minus earth of C4, the negative pole of D1 also couples the startup pin of U1 through resistance R 10, the negative pole of D1 also connects another pin of T1 input, the grid of Q1 couples the driving pin of U1 through resistance R 6, the source electrode of Q1 couples the current detecting pin of U1 through resistance R 8, the source electrode of Q1 is also through resistance R 7 ground connection, the T1 output couples the head end of output rectification circuit, the end of output rectification circuit couples the input of output filter LF2, and the head end of feedback circuit is coupled to the input of LF2, and the end of feedback circuit is coupled to the feedback pin of U1.
Wherein, described output rectification circuit comprises diode D4, electrochemical capacitor C8, electrochemical capacitor C9 and inductance L 2, one pin of high frequency transformer T1 output connects the positive pole of D4, the negative pole of D4 connects the positive pole of C8 and the head end of L2 simultaneously, the end of L2 connects the positive pole of C9, another pin common ground of the negative pole of C9, the negative pole of C8 and T1 output, the positive pole of C9 and negative pole coupling are connected to the input of output filter LF2 respectively.
Wherein, described feedback circuit comprises optocoupler U2, three ends are adjustable shunting a reference source TL431, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, capacitor C 12 and capacitor C 14, R11, the head end of R14 and R15 is coupled to the input of output filter LF2 simultaneously, the end of R15 connects the head end of C12, the end of C12 connects the head end of R16, the end of R14 connects the head end of R16, the end of R11 connects the head end of R12 and the anode of U2 simultaneously, the end of R12 and the negative electrode of U2 connect the head end of R13 and the negative electrode of TL431 simultaneously, the end of R13 connects the head end of C14, the reference edge of TL431 and the end of C14 all are connected the head end of R16, the end of R16 and the plus earth of TL431, the output of U2 is coupled to the feedback pin of U1.
Wherein, described quasi-resonant switching power supply control chip U1 is L6565, NCP1207, NCP1377, NCP1337, OB2203 or UCC28600.
Wherein, described optocoupler U2 is PC817.
In sum, the utility model can both have the output ripple and low of two stage power factor correcting structure at the middle low power application of power, had the low cost of single step arrangement again, and efficient is also higher.
For further setting forth the utility model is technological means and the effect that the predetermined purpose of realization is taked, see also following about detailed description of the present utility model and accompanying drawing, believe the purpose of this utility model, feature and characteristics, should obtain thus going deep into and concrete understanding, yet accompanying drawing only provides reference and explanation usefulness, is not to be used for the utility model is limited.
Description of drawings
Below in conjunction with accompanying drawing,, will make the technical solution of the utility model and other beneficial effects apparent by embodiment of the present utility model is described in detail.
In the accompanying drawing,
Fig. 1 is the circuit theory schematic diagram of the two-in-one switching power circuit of the utility model PFC/PWM;
Fig. 2 is the circuit diagram of two-in-one switching power circuit first preferred embodiment of the utility model PFC/PWM;
Fig. 3 is the circuit diagram of two-in-one switching power circuit second preferred embodiment of the utility model PFC/PWM;
Fig. 4 is the circuit diagram of two-in-one switching power circuit the 3rd preferred embodiment of the utility model PFC/PWM;
Fig. 5 is the circuit diagram of two-in-one switching power circuit the 4th preferred embodiment of the utility model PFC/PWM;
Fig. 6 is the circuit diagram of two-in-one switching power circuit the 5th preferred embodiment of the utility model PFC/PWM.
Embodiment
As shown in Figure 1, it is the circuit theory schematic diagram of the two-in-one switching power circuit of the utility model PFC/PWM.This circuit mainly comprises: EMI (electromagnetic interference) filter circuit 1, rectification circuit 2, feedback circuit 3, output rectification circuit 4, quasi-resonant switching power supply control chip U1, high-voltage MOSFET (MOS field-effect transistor) Q1, low-capacitance CBB (polypropylene) capacitor C 2, low-capacitance CBB capacitor C 3, electrochemical capacitor C4, resistance R 6, resistance R 7, resistance R 8, resistance R 10, high frequency transformer T1, fast diode D1, energy storage inductor L1 and output filter LF2 etc.EMI filter circuit 1 can be common filter circuit form, and rectification circuit 2 can be common bridge rectifier.
Exchange the head end that input couples EMI filter circuit 1, the end of EMI filter circuit 1 couples rectification circuit 2, the end of rectification circuit 2 also connects the head end of L1 simultaneously through C2 ground connection, the end of L1 connects the head end of C3 and the positive pole of D1 simultaneously, the end of C3 connects a pin of T1 input and the drain electrode of Q1 simultaneously, the negative pole of D1 connects the positive pole of C4, the minus earth of C4, the negative pole of D1 also couples the startup pin of U1 through resistance R 10, the negative pole of D1 also connects another pin of T1 input, the grid of Q1 couples the driving pin of U1 through resistance R 6, the source electrode of Q1 couples the current detecting pin of U1 through resistance R 8, the source electrode of Q1 is also through resistance R 7 ground connection, the T1 output couples the head end of output rectification circuit 4, the end of output rectification circuit 4 couples the input of output filter LF2, and the head end of feedback circuit 3 is coupled to the input of output filter LF2, and the end of feedback circuit 3 is coupled to the feedback pin of U1.
After exchanging input process EMI filter circuit 1 filtering and rectification circuit 2 rectifications, obtain pulsating dc voltage, pulsating dc voltage charges to C4 through L1, D1 again, and quasi-resonant switching power supply control chip U1 must establish beginning work by cable through starting resistance R10.The working method of quasi-resonant switching power supply control chip U1 is: in the minimum point of high-voltage MOSFET Q1 drain waveforms, it is open-minded to drive Q1, and switching loss is less like this, and efficient is improved, and the EMI effect might as well.When U1 control high-voltage MOSFET Q1 conducting, C4, exchanges simultaneously and imports through C3 the L1 energy storage high frequency transformer T1 energy storage through Q1.When high-voltage MOSFET Q1 closed, the energy storage of high frequency transformer T1 instead swashs gave output, and the energy storage of L1 is charged to C4 through D1, and capacitor C 3 is discharged to high frequency transformer T1 through D1.
Use schematic diagram shown in Figure 1 design the two-in-one switching power circuit of PFC/PWM the time, application at the input of 100-240V full voltage, energy storage inductor L1 and charge and discharge bad the taking into account of electric capacity C3 parameter, therefore can in physical circuit, increase low-power high-voltage MOSFET Q2 (or low-power high-voltage controllable silicon Q2), triode Q3 and another charge and discharge electric capacity C13 (referring to Fig. 2, Fig. 4, Fig. 5 and Fig. 6), when 100V imports, open another and charge and discharge electric capacity C13 by low-power high-voltage MOSFET Q2 (or low-power high-voltage controllable silicon Q2), PFC value when importing to improve 100V, and when 220V imports, by Q3 Q2 is closed.
Quasi-resonant switching power supply control chip U1, high-voltage MOSFET Q1, C4, high frequency transformer T1, D4, C8, C9, L2, optocoupler U2, three ends are adjustable shunting a reference source TL431 etc. form the reverse exciting switching voltage regulator voltage stabilizing circuit.Quasi-resonant switching power supply control chip U1, high-voltage MOSFET Q1, C4 form the PFC booster circuit with C2, L1, C3, D1 etc. again.Therefore, this circuit both can be realized power factor correction, can realize the PWM voltage stabilizing again.
As shown in Figure 2, it is the circuit diagram of two-in-one switching power circuit first preferred embodiment of the utility model PFC/PWM.In this first preferred embodiment, mainly comprise EMI filter circuit 1, rectification circuit 2, feedback circuit 3, output rectification circuit 4, U1 is L6565.Application at the input of 100-240V full voltage, increase low-power high-voltage MOSFET Q2, triode Q3 and another charge and discharge electric capacity C13, when 100V imports, open another and charge and discharge electric capacity C13 by low-power high-voltage MOSFET Q2, PFC value when importing to improve 100V, and when 220V imports, by Q3 Q2 is closed.
As shown in Figure 3, it is the circuit diagram of two-in-one switching power circuit second preferred embodiment of the utility model PFC/PWM.In this second preferred embodiment, mainly comprise EMI filter circuit 1, rectification circuit 2, feedback circuit 3, output rectification circuit 4, U1 is NCP1207 or NCP1377, optocoupler U2 is PC817.
As shown in Figure 4, it is the circuit diagram of two-in-one switching power circuit the 3rd preferred embodiment of the utility model PFC/PWM.In the 3rd preferred embodiment, mainly comprise EMI filter circuit 1, rectification circuit 2, feedback circuit 3, output rectification circuit 4, U1 is NCP1337.In this preferred embodiment, the collector electrode of optocoupler U2 is connected to the Vcc pin of U1, and the emitter of U2 connects the FB pin of U1.Application at the input of 100-240V full voltage, increase low-power high-voltage controllable silicon Q2, triode Q3 and another charge and discharge electric capacity C13, when 100V imports, open another and charge and discharge electric capacity C13 by low-power high-voltage controllable silicon Q2, PFC value when importing to improve 100V, and when 220V imports, by Q3 Q2 is closed.
As shown in Figure 5, it is the circuit diagram of two-in-one switching power circuit the 4th preferred embodiment of the utility model PFC/PWM.In the 4th preferred embodiment, mainly comprise EMI filter circuit 1, rectification circuit 2, feedback circuit 3, output rectification circuit 4, U1 is OB2203.Application at the input of 100-240V full voltage, increase low-power high-voltage controllable silicon Q2, triode Q3 and another charge and discharge electric capacity C13, when 100V imports, open another and charge and discharge electric capacity C13 by low-power high-voltage controllable silicon Q2, PFC value when importing to improve 100V, and when 220V imports, by Q3 Q2 is closed.
As shown in Figure 6, it is the circuit diagram of two-in-one switching power circuit the 5th preferred embodiment of the utility model PFC/PWM.In the 5th preferred embodiment, mainly comprise EMI filter circuit 1, rectification circuit 2, feedback circuit 3, output rectification circuit 4, U1 is UCC28600.Application at the input of 100-240V full voltage, increase low-power high-voltage controllable silicon Q2, triode Q3 and another charge and discharge electric capacity C13, when 100V imports, open another and charge and discharge electric capacity C13 by low-power high-voltage controllable silicon Q2, PFC value when importing to improve 100V, and when 220V imports, by Q3 Q2 is closed.
In sum, the utility model can both have the output ripple and low of two stage power factor correcting structure at the middle low power application of power, had the low cost of single step arrangement again, and efficient is also higher.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to the technical solution of the utility model and technical conceive, and all these changes and distortion all should belong to the protection range of the utility model accompanying Claim.
Claims (4)
1. two-in-one switching power circuit of PFC/PWM, it is characterized in that, comprising: EMI filter circuit, rectification circuit, feedback circuit, output rectification circuit, quasi-resonant switching power supply control chip U1, high-voltage MOSFET Q1, CBB capacitor C 2, CBB capacitor C 3, electrochemical capacitor C4, resistance R 6, resistance R 7, resistance R 8, resistance R 10, high frequency transformer T1, fast diode D1, energy storage inductor L1 and output filter LF2; Exchange the head end that input couples the EMI filter circuit, the end of EMI filter circuit couples rectification circuit, the end of rectification circuit also connects the head end of L1 simultaneously through C2 ground connection, the end of L1 connects the head end of C3 and the positive pole of D1 simultaneously, the end of C3 connects a pin of T1 input and the drain electrode of Q1 simultaneously, the negative pole of D1 connects the positive pole of C4, the minus earth of C4, the negative pole of D1 also couples the startup pin of U1 through resistance R 10, the negative pole of D1 also connects another pin of T1 input, the grid of Q1 couples the driving pin of U1 through resistance R 6, the source electrode of Q1 couples the current detecting pin of U1 through resistance R 8, the source electrode of Q1 is also through resistance R 7 ground connection, the T1 output couples the head end of output rectification circuit, the end of output rectification circuit couples the input of output filter LF2, and the head end of feedback circuit is coupled to the input of LF2, and the end of feedback circuit is coupled to the feedback pin of U1.
2. the two-in-one switching power circuit of PFC/PWM as claimed in claim 1, it is characterized in that, described output rectification circuit comprises diode D4, electrochemical capacitor C8, electrochemical capacitor C9 and inductance L 2, one pin of high frequency transformer T1 output connects the positive pole of D4, the negative pole of D4 connects the positive pole of C8 and the head end of L2 simultaneously, the end of L2 connects the positive pole of C9, another pin common ground of the negative pole of C9, the negative pole of C8 and T1 output, the positive pole of C9 and negative pole coupling are connected to the input of output filter LF2 respectively.
3. the two-in-one switching power circuit of PFC/PWM as claimed in claim 1, it is characterized in that, described feedback circuit comprises optocoupler U2, three ends are adjustable shunting a reference source TL431, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, capacitor C 12 and capacitor C 14, R11, the head end of R14 and R15 is coupled to the input of output filter LF2 simultaneously, the end of R15 connects the head end of C12, the end of C12 connects the head end of R16, the end of R14 connects the head end of R16, the end of R11 connects the head end of R12 and the anode of U2 simultaneously, the end of R12 and the negative electrode of U2 connect the head end of R13 and the negative electrode of TL431 simultaneously, the end of R13 connects the head end of C14, the reference edge of TL431 and the end of C14 all are connected the head end of R16, the end of R16 and the plus earth of TL431, the output of U2 is coupled to the feedback pin of U1.
4. the two-in-one switching power circuit of PFC/PWM as claimed in claim 1 is characterized in that, described quasi-resonant switching power supply control chip U1 is L6565, NCP1207, NCP1377, NCP1337, OB2203 or UCC28600.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205691179U CN201839208U (en) | 2010-10-20 | 2010-10-20 | PFC/PWM two-in-one switching power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205691179U CN201839208U (en) | 2010-10-20 | 2010-10-20 | PFC/PWM two-in-one switching power supply circuit |
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| CN201839208U true CN201839208U (en) | 2011-05-18 |
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| CN2010205691179U Expired - Fee Related CN201839208U (en) | 2010-10-20 | 2010-10-20 | PFC/PWM two-in-one switching power supply circuit |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102638184A (en) * | 2012-04-27 | 2012-08-15 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency alternating current-direct current voltage converting circuit |
| CN102710137A (en) * | 2012-05-25 | 2012-10-03 | 无锡实益达电子有限公司 | Low power switch power supply with high power factor and low current ripple |
| CN103002638A (en) * | 2012-10-31 | 2013-03-27 | 芜湖崧欣电子科技有限公司 | Led drive circuit |
| CN103138608A (en) * | 2011-11-29 | 2013-06-05 | 鸿富锦精密工业(武汉)有限公司 | Power output regulating circuit |
| CN103683208A (en) * | 2013-11-22 | 2014-03-26 | 乐视致新电子科技（天津）有限公司 | Protective circuit, power panel, television set and control method of protective circuit |
| CN103795232A (en) * | 2013-11-30 | 2014-05-14 | 许继电气股份有限公司 | Quasi resonant flyback power supply and high voltage starting circuit thereof |
| CN103997226A (en) * | 2014-05-30 | 2014-08-20 | 国家电网公司 | Power source for electricity utilizing information collecting terminal |
| CN105322638A (en) * | 2014-07-30 | 2016-02-10 | 深圳索瑞德电子有限公司 | Photovoltaic system energy output method and photovoltaic power supply system |
| CN106877630A (en) * | 2017-03-03 | 2017-06-20 | 广东欧珀移动通信有限公司 | The secondary circuit and Switching Power Supply of Switching Power Supply |
| WO2024125262A1 (en) * | 2022-12-15 | 2024-06-20 | 华为技术有限公司 | Switching power supply circuit, switching power supply, electronic device and power supply system |
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2010
- 2010-10-20 CN CN2010205691179U patent/CN201839208U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103138608A (en) * | 2011-11-29 | 2013-06-05 | 鸿富锦精密工业(武汉)有限公司 | Power output regulating circuit |
| CN102638184A (en) * | 2012-04-27 | 2012-08-15 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency alternating current-direct current voltage converting circuit |
| TWI489762B (en) * | 2012-04-27 | 2015-06-21 | Silergy Corp | High efficiency AC - DC voltage conversion circuit |
| CN102710137A (en) * | 2012-05-25 | 2012-10-03 | 无锡实益达电子有限公司 | Low power switch power supply with high power factor and low current ripple |
| CN103002638A (en) * | 2012-10-31 | 2013-03-27 | 芜湖崧欣电子科技有限公司 | Led drive circuit |
| CN103683208A (en) * | 2013-11-22 | 2014-03-26 | 乐视致新电子科技（天津）有限公司 | Protective circuit, power panel, television set and control method of protective circuit |
| CN103795232A (en) * | 2013-11-30 | 2014-05-14 | 许继电气股份有限公司 | Quasi resonant flyback power supply and high voltage starting circuit thereof |
| CN103997226A (en) * | 2014-05-30 | 2014-08-20 | 国家电网公司 | Power source for electricity utilizing information collecting terminal |
| CN105322638A (en) * | 2014-07-30 | 2016-02-10 | 深圳索瑞德电子有限公司 | Photovoltaic system energy output method and photovoltaic power supply system |
| CN106877630A (en) * | 2017-03-03 | 2017-06-20 | 广东欧珀移动通信有限公司 | The secondary circuit and Switching Power Supply of Switching Power Supply |
| WO2024125262A1 (en) * | 2022-12-15 | 2024-06-20 | 华为技术有限公司 | Switching power supply circuit, switching power supply, electronic device and power supply system |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20121020 |