CN102545579A - Power factor correction pre-adjusting circuit and switch power source - Google Patents
Power factor correction pre-adjusting circuit and switch power source Download PDFInfo
- Publication number
- CN102545579A CN102545579A CN201110445094XA CN201110445094A CN102545579A CN 102545579 A CN102545579 A CN 102545579A CN 201110445094X A CN201110445094X A CN 201110445094XA CN 201110445094 A CN201110445094 A CN 201110445094A CN 102545579 A CN102545579 A CN 102545579A
- Authority
- CN
- China
- Prior art keywords
- resistance
- circuit
- voltage
- factor correction
- power factor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention provides a power factor correction pre-adjusting circuit and a switch power source, which are applicable to the technical field of the design of power factor correction circuits. The circuit comprises a voltage division circuit, a feedback circuit and a voltage boosting/reducing adjusting circuit, the feedback circuit is used for providing a first passage for first divided voltage to supply power for a voltage control circuit, and the voltage boosting/reducing adjusting circuit is used for providing a second passage for second divided voltage to supply power for the voltage control circuit when the second divided voltage is boosted, and/or providing a third passage for third divided voltage to supply power for the voltage control circuit when the third divided voltage is reduced. The voltage boosting/reducing adjusting circuit extracts current via the first passage and the second passage in real time along with fluctuation of voltage outputted from a power factor correction conversion circuit, or injects current to the first passage and the third passage, accordingly increases dynamic response ability of the power factor correction conversion circuit, and can act even if the voltage outputted from the power factor correction conversion circuit is not within a certain range.
Description
Technical field
The invention belongs to the Power Factor Correction Circuit Design technical field, relate in particular to a kind of power factor correction pre-adjustment circuit and Switching Power Supply.
Background technology
Present power electronic equipment has generally adopted power factor correction, and (Power Factor Correction, PFC) technology is to reduce the harmonic pollution of device to electrical network.
Fig. 1 has shown application that prior art the provides typical structure of Switching Power Supply of PFC technology, this Switching Power Supply adopts two-stage PFC structure, comprises power factor correction translation circuit, DC-DC transfer circuit and voltage control circuit.Power factor correction translation circuit wherein is used for alternating current AC is carried out rectification and Filtering Processing, so that input current and input voltage waveform, phase place are consistent, improves power factor, reduces percent harmonic distortion; DC-DC transfer circuit wherein is in order to carry out voltage transformation, to export required direct current DC; Voltage control circuit wherein makes that through gathering the output voltage of power factor correction translation circuit power factor correction translation circuit output voltage is constant, plays the effect of Voltage loop control.
Usually; In order to suppress harmonic distortion; Need to reduce the low pass filter cutoff frequency of voltage control circuit, that is to say that the Voltage loop bandwidth of power factor correction translation circuit is very low; And low bandwidth can influence the dynamic response capability of power factor correction translation circuit to load variations, and this kind Switching Power Supply that makes prior art provide is not suitable for the fast-changing occasion of load frequent.For example; Load is prominent unloads or during the situation of load impact or input saltus step when occurring; The output voltage of power factor correction translation circuit overshoot can occur or drag down; And it is slower to return to normal value, and then makes the direct current DC of DC-DC transfer circuit output follow to occur the phenomenon of leaping high or dragging down, and causes device to damage owing to overvoltage or overcurrent easily.
Be head it off; Prior art provides a power factor correction pre-adjustment circuit; This power factor correction pre-adjustment circuit is connected between DC-DC transfer circuit and the voltage control circuit, shows the circuit diagram of the power factor correction pre-adjustment circuit that prior art provides like Fig. 2.The voltage of supposing amplifier A 1 in-phase input end is V1; The voltage of amplifier A1 inverting input is V2, and the voltage of amplifier A2 in-phase input end is V3, and the voltage of amplifier A2 inverting input is V4; Resistance R 5 one ends are the voltage Vfb of input voltage control circuit; The voltage of resistance R 5 other ends is V5, and the output voltage of power factor correction translation circuit is Vpfc, and then the operation principle of this circuit is following:
When stable state, Vpfc=Vpfc1, V1＞Vfb, V3＞Vfb, amplifier A1 since diode D1 anti-partially and by, amplifier A2 because diode D2 partially anti-and by, this power factor correction pre-adjustment circuit does not play corrective action;
When Vpfc is increased to Vpfc2 by Vpfc1, V1＞V2, diode D1 by; But when V3＞Vfb, the conducting of diode D2, at this moment; V5 provides electric current through resistance R 5 to Vfb; Simultaneously V3 provides electric current through amplifier A2, diode D2, resistance R 7 to Vfb, thereby makes the variation of Voltage loop faster response Vpfc, accelerates the regulating power of power factor correction translation circuit.Yet in such cases, the work prerequisite of this power factor correction pre-adjustment circuit is V3＞Vfb, can know through calculating, and when V3＞Vfb, has:
When Vpfc is reduced to Vpfc3 by Vpfc1, V3＜V4, diode D2 ends; But when V1＜Vfb, diode D1 conducting, at this moment; V5 provides electric current through resistance R 5 to Vfb; Simultaneously V1 provides electric current through amplifier A1, diode D1, resistance R 6 to Vfb, thereby makes the variation of Voltage loop faster response Vpfc, accelerates the regulating power of power factor correction translation circuit.Yet in such cases, the work prerequisite of this power factor correction pre-adjustment circuit is V1＜Vfb, can know through calculating, and when V1＜Vfb, has:
In sum, the fluctuation of Vpfc is within the specific limits the time, and this power factor correction pre-adjustment circuit that prior art provides just works, and to reach the purpose of accelerating power factor correction translation circuit regulating power, is of limited application.
Summary of the invention
The object of the present invention is to provide a kind of power factor correction pre-adjustment circuit; The power factor correction pre-adjustment circuit that being intended to solve prior art provides is when its input voltage Vpfc satisfies certain limit; Just can reach the purpose of accelerating power factor correction translation circuit regulating power, the problem that range of application is limited.
The present invention is achieved in that a kind of power factor correction pre-adjustment circuit, and said circuit comprises:
Bleeder circuit is used for the output voltage of power factor correction translation circuit is carried out dividing potential drop, generates first branch pressure voltage, and generates second branch pressure voltage and/or the 3rd branch pressure voltage;
Feedback circuit is used to provide first path of said first branch pressure voltage to the voltage control circuit power supply;
The step-up/down regulating circuit; Be used for when said second branch pressure voltage raises; The alternate path of said second branch pressure voltage to said voltage control circuit power supply is provided in real time; So that said voltage control circuit extracts electric current from said first path and said alternate path; And/or when said the 3rd branch pressure voltage reduces, three paths of said the 3rd branch pressure voltage to said voltage control circuit power supply are provided in real time, so that said voltage control circuit is to said first path and said the 3rd path injection current.
Another object of the present invention is to provide a kind of Switching Power Supply, comprise a power factor correction translation circuit, a DC-DC transfer circuit and a voltage control circuit, said Switching Power Supply also comprises above-mentioned power factor correction pre-adjustment circuit.
Because in the power factor correction pre-adjustment circuit that the embodiment of the invention provides; The step-up/down regulating circuit is followed the fluctuation of power factor correction translation circuit output voltage and real-time is passed through first path and alternate path extracts electric current; Or to first path and the 3rd path injection current; Thereby accelerate the regulating power of the Voltage loop of power factor correction translation circuit, improved the dynamic response capability of power factor correction translation circuit, and just move when need not power factor correction translation circuit output voltage satisfying certain limit; With respect to prior art, can widen the range of application of power factor correction pre-adjustment circuit.
Description of drawings
Fig. 1 is the structure chart of the two-stage PFC Switching Power Supply that provides of prior art;
Fig. 2 is the circuit diagram of the power factor correction pre-adjustment circuit among Fig. 1;
Fig. 3 is the structure chart of the power factor correction pre-adjustment circuit that provides of the embodiment of the invention;
Fig. 4 is the structure chart of step-up/down regulating circuit among Fig. 3;
Fig. 5 is the power factor correction pre-adjustment circuit diagram that one embodiment of the invention provides;
Fig. 6 is the power factor correction pre-adjustment circuit diagram that another embodiment of the present invention provides.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Problem to the prior art existence; The power factor correction pre-adjustment circuit that the embodiment of the invention provides is provided with a step-up/down regulating circuit; It is followed the fluctuation of power factor correction translation circuit output voltage and real-time passes through first path and alternate path extracts electric current, or to first path and the 3rd path injection current.
Fig. 3 shows the structure of the power factor correction pre-adjustment circuit that the embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with the embodiment of the invention.
The power factor correction pre-adjustment circuit that the embodiment of the invention provides comprises: bleeder circuit 31, be used for the output voltage of power factor correction translation circuit is carried out dividing potential drop, and generate first branch pressure voltage, and generate second branch pressure voltage and/or the 3rd branch pressure voltage; Feedback circuit 33 is used to provide first path of first branch pressure voltage of bleeder circuit 31 generations to the voltage control circuit power supply; Step-up/down regulating circuit 32; Be used for when second branch pressure voltage of bleeder circuit 31 generations raises; The alternate path of second branch pressure voltage to the voltage control circuit power supply is provided in real time, so that voltage control circuit extracts electric current from first path and alternate path, and/or when the 3rd branch pressure voltage of bleeder circuit 31 generations reduces; Three paths of the 3rd branch pressure voltage to the voltage control circuit power supply are provided in real time, so that voltage control circuit is to first path and the 3rd path injection current.
Because in the power factor correction pre-adjustment circuit that the embodiment of the invention provides; Step-up/down regulating circuit 32 is followed the fluctuation of power factor correction translation circuit output voltage and real-time is passed through first path and alternate path extracts electric current; Or to first path and the 3rd path injection current; Thereby accelerate the regulating power of the Voltage loop of power factor correction translation circuit, improved the dynamic response capability of power factor correction translation circuit, and just move when need not power factor correction translation circuit output voltage satisfying certain limit; With respect to prior art, can widen the range of application of power factor correction pre-adjustment circuit.
Fig. 4 shows the structure of step-up/down regulating circuit 32 among Fig. 3, for the ease of explanation, only shows the part relevant with the embodiment of the invention.
In the embodiment of the invention; Step-up/down regulating circuit 32 can comprise: regulating circuit 321 boosts; Be used for when second branch pressure voltage of bleeder circuit 31 generations raises; The alternate path of second branch pressure voltage to the voltage control circuit power supply is provided in real time, so that voltage control circuit extracts electric current from first path and alternate path; And/or reduction regulation circuit 322, be used for when the 3rd branch pressure voltage of bleeder circuit 31 generations reduces, three paths of the 3rd branch pressure voltage to the voltage control circuit power supply being provided in real time, so that voltage control circuit is to first path and the 3rd path injection current.
Fig. 5 shows the power factor correction pre-adjustment circuit that one embodiment of the invention provides.
Wherein, bleeder circuit 31 can comprise resistance R 8, resistance R 9, resistance R 10 and resistance R 11, and the resistance of resistance R 9 equates with the resistance of resistance R 10; One end of resistance R 8 connects the voltage output end of power factor correction translation circuit as the input of this power factor correction pre-adjustment circuit; The other end of resistance R 8 connects an end of resistance R 9; The other end of resistance R 9 connects an end of resistance R 10; The other end of resistance R 10 connects an end of resistance R 11, the other end ground connection of resistance R 11; The other end of resistance R 8 connects the regulating circuit 321 that boosts simultaneously, and the other end of resistance R 9 connects feedback circuit 33 simultaneously, and the other end of resistance R 10 connects reduction regulation circuit 322 simultaneously.
Wherein, feedback circuit 33 can comprise resistance R 14, and an end of resistance R 14 connects the other end of resistance R 9, and the other end of resistance R 14 connects the voltage input end of voltage control circuit as the output of this power factor correction pre-adjustment circuit.
Wherein, the regulating circuit 321 that boosts can comprise: amplifier A3, diode D3 and resistance R 12; The in-phase input end of amplifier A3 connects the other end of resistance R 8; The output of amplifier A3 connects the anode of diode D3; The negative electrode of diode D3 connects the inverting input of amplifier A3, and the negative electrode of diode D3 connects the voltage input end of voltage control circuit simultaneously through resistance R 12.
Simultaneously, reduction regulation circuit 322 can comprise: amplifier A4, diode D4 and resistance R 13, and the resistance of resistance R 13 equates with the resistance of resistance R 12; The in-phase input end of amplifier A4 connects the other end of resistance R 10; The output of amplifier A4 connects the negative electrode of diode D4; The anode of diode D4 connects the inverting input of amplifier A4, and the anode of diode D4 connects the voltage input end of voltage control circuit simultaneously through resistance R 13.
The voltage of supposing the in-phase input end of amplifier A3 is V1; The voltage of the inverting input of amplifier A3 is V2, and the voltage of resistance R 9 other ends is V3, and the voltage of the in-phase input end of amplifier A4 is V4; The voltage of the inverting input of amplifier A4 is V5; The voltage of the voltage input end of voltage control circuit is Vfb, and the voltage of the voltage output end of power factor correction translation circuit is Vpfc, and the electric current of the alternate path that power amplifier A3, diode D3 and resistance R 12 constitute is I1; The electric current of the 3rd path that power amplifier A4, diode D4 and resistance R 13 constitute is I2, and the principle of power factor correction pre-adjustment circuit shown in Figure 5 is detailed below:
When stable state, because the resistance of resistance R 9 equals the resistance of resistance R 10, thus V1=V2＞V3＞V4=V5, V3=Vfb, and V2-V3=V3-V4; Owing to I1=(V2-Vfb)/R12, so I2=(Vfb-V5)/R13, and R12=R13 are I1=I2 again.
When overshoot appears in Vpfc, this variation of V1 fast reaction, V3 and V4 variation relatively lag behind.At this moment; V1-V3＞V3-V4; So I1=(V2-Vfb)/R12＞I2=(Vfb-V5)/R13, Vfb also extracts electric current from alternate path except from first path extracts electric current; Thereby the Voltage loop of accelerating the power factor correction translation circuit is calculated output and is changed, and has improved the dynamic response capability of power factor correction translation circuit.
When falling appears in Vpfc, this variation of V1 fast reaction, V3 and V4 variation relatively lag behind.At this moment; V1-V3＜V3-V4; So I1=(V2-Vfb)/R12＜I2=(Vfb-V5)/R13, Vfb is except to the first path injection current, also to the 3rd path injection current; Thereby the Voltage loop of accelerating the power factor correction translation circuit is calculated output and is changed, and has improved the dynamic response capability of power factor correction translation circuit.
Fig. 6 shows the power factor correction pre-adjustment circuit that another embodiment of the present invention provides.
With shown in Figure 5 different; In the another embodiment of the present invention; Feedback circuit 33 is used a lead and is replaced resistance R 14, and an end of this lead connects the other end of resistance R 9, and the other end of this lead connects the voltage input end of voltage control circuit as the output of this power factor correction pre-adjustment circuit.The part of other part, the annexation between the each several part and operation principle are as above said to the description of Fig. 5, repeat no more at this.
The embodiment of the invention also provides a kind of Switching Power Supply; Comprise a power factor correction translation circuit, a DC-DC transfer circuit and a voltage control circuit; Switching Power Supply also comprises above-mentioned power factor correction pre-adjustment circuit; Annexation between this power factor correction pre-adjustment network component, the each several part and operation principle repeat no more at this as stated.
Because in the power factor correction pre-adjustment circuit that the embodiment of the invention provides; Step-up/down regulating circuit 32 is followed the fluctuation of power factor correction translation circuit output voltage and real-time is passed through first path and alternate path extracts electric current; Or to first path and the 3rd path injection current; Thereby accelerate the regulating power of the Voltage loop of power factor correction translation circuit, improved the dynamic response capability of power factor correction translation circuit, and just move when need not power factor correction translation circuit output voltage satisfying certain limit; With respect to prior art, can widen the range of application of power factor correction pre-adjustment circuit.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. power factor correction pre-adjustment circuit is characterized in that said circuit comprises:
Bleeder circuit is used for the output voltage of power factor correction translation circuit is carried out dividing potential drop, generates first branch pressure voltage, and generates second branch pressure voltage and/or the 3rd branch pressure voltage;
Feedback circuit is used to provide first path of said first branch pressure voltage to the voltage control circuit power supply;
The step-up/down regulating circuit; Be used for when said second branch pressure voltage raises; The alternate path of said second branch pressure voltage to said voltage control circuit power supply is provided in real time; So that said voltage control circuit extracts electric current from said first path and said alternate path; And/or when said the 3rd branch pressure voltage reduces, three paths of said the 3rd branch pressure voltage to said voltage control circuit power supply are provided in real time, so that said voltage control circuit is to said first path and said the 3rd path injection current.
2. power factor correction pre-adjustment circuit as claimed in claim 1 is characterized in that, said step-up/down regulating circuit comprises:
The regulating circuit that boosts is used for when said second branch pressure voltage raises, and the alternate path of said second branch pressure voltage to said voltage control circuit power supply is provided in real time, so that said voltage control circuit extracts electric current from said first path and said alternate path; And/or
The reduction regulation circuit is used for when said the 3rd branch pressure voltage reduces, and three paths of said the 3rd branch pressure voltage to said voltage control circuit power supply is provided in real time, so that said voltage control circuit is to said first path and said the 3rd path injection current.
3. power factor correction pre-adjustment circuit as claimed in claim 2 is characterized in that said bleeder circuit comprises resistance R 8, resistance R 9, resistance R 10 and resistance R 11, and the resistance of said resistance R 9 equates with the resistance of said resistance R 10;
One end of said resistance R 8 connects the voltage output end of said power factor correction translation circuit as the input of said power factor correction pre-adjustment circuit; The other end of said resistance R 8 connects an end of said resistance R 9; The other end of said resistance R 9 connects an end of said resistance R 10; The other end of said resistance R 10 connects an end of said resistance R 11, the other end ground connection of said resistance R 11; The other end of said resistance R 8 connects the said regulating circuit that boosts simultaneously, and the other end of said resistance R 9 connects said feedback circuit simultaneously, and the other end of said resistance R 10 connects said reduction regulation circuit simultaneously.
4. power factor correction pre-adjustment circuit as claimed in claim 3; It is characterized in that; Said feedback circuit comprises resistance R 14; One end of said resistance R 14 connects the other end of said resistance R 9, and the other end of said resistance R 14 connects the voltage input end of said voltage control circuit as the output of said power factor correction pre-adjustment circuit.
5. power factor correction pre-adjustment circuit as claimed in claim 3; It is characterized in that; Said feedback circuit comprises a lead; One end of said lead connects the other end of said resistance R 9, and the other end of said lead connects the voltage input end of said voltage control circuit as the output of said power factor correction pre-adjustment circuit.
6. power factor correction pre-adjustment circuit as claimed in claim 3 is characterized in that, the said regulating circuit that boosts comprises: amplifier A3, diode D3 and resistance R 12;
The in-phase input end of said amplifier A3 connects the other end of said resistance R 8; The output of said amplifier A3 connects the anode of said diode D3; The negative electrode of said diode D3 connects the inverting input of said amplifier A3, and the negative electrode of said diode D3 connects the voltage input end of said voltage control circuit simultaneously through said resistance R 12.
7. power factor correction pre-adjustment circuit as claimed in claim 6 is characterized in that, said reduction regulation circuit comprises: amplifier A4, diode D4 and resistance R 13, and the resistance of said resistance R 13 equates with the resistance of said resistance R 12;
The in-phase input end of said amplifier A4 connects the other end of said resistance R 10; The output of said amplifier A4 connects the negative electrode of said diode D4; The anode of said diode D4 connects the inverting input of said amplifier A4, and the anode of said diode D4 connects the voltage input end of said voltage control circuit simultaneously through said resistance R 13.
8. Switching Power Supply; Comprise a power factor correction translation circuit, a DC-DC transfer circuit and a voltage control circuit; It is characterized in that said Switching Power Supply also comprises like each described power factor correction pre-adjustment circuit of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110445094.XA CN102545579B (en) | 2011-12-27 | 2011-12-27 | Power factor correction pre-adjusting circuit and switch power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110445094.XA CN102545579B (en) | 2011-12-27 | 2011-12-27 | Power factor correction pre-adjusting circuit and switch power source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102545579A true CN102545579A (en) | 2012-07-04 |
| CN102545579B CN102545579B (en) | 2014-04-02 |
Family
ID=46351721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110445094.XA Active CN102545579B (en) | 2011-12-27 | 2011-12-27 | Power factor correction pre-adjusting circuit and switch power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102545579B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002079892A1 (en) * | 2001-03-30 | 2002-10-10 | Champion Microelectronic, Corp. | Power factor correction circuit arrangement |
| CN101064432A (en) * | 2006-04-30 | 2007-10-31 | 艾默生网络能源系统有限公司 | Voltage dynamic adjusting circuit of power factor corrector |
| US20110156665A1 (en) * | 2009-12-31 | 2011-06-30 | Chung-Hsin Electric And Machinery Manufacturing Corp. | Linear modulation voltage transformer circuitry |
| CN102290972A (en) * | 2011-08-15 | 2011-12-21 | 成都芯源系统有限公司 | Switching power supply and control circuit and control method thereof |
-
2011
- 2011-12-27 CN CN201110445094.XA patent/CN102545579B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002079892A1 (en) * | 2001-03-30 | 2002-10-10 | Champion Microelectronic, Corp. | Power factor correction circuit arrangement |
| CN101064432A (en) * | 2006-04-30 | 2007-10-31 | 艾默生网络能源系统有限公司 | Voltage dynamic adjusting circuit of power factor corrector |
| US20110156665A1 (en) * | 2009-12-31 | 2011-06-30 | Chung-Hsin Electric And Machinery Manufacturing Corp. | Linear modulation voltage transformer circuitry |
| CN102290972A (en) * | 2011-08-15 | 2011-12-21 | 成都芯源系统有限公司 | Switching power supply and control circuit and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102545579B (en) | 2014-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104158399B (en) | Single-inductor positive and negative voltage output device | |
| WO2007106184A2 (en) | Switching power supply system with pre-regulator for circuit or personnel protection devices | |
| CN107425718B (en) | Direct current step-down regulating circuit structure | |
| CN205453114U (en) | Power supply surge inhibitor with prevent joining conversely function | |
| CN109327131B (en) | Current-limiting switch circuit and switching power supply device | |
| US20180041111A1 (en) | Circuit and Method for Overcurrent Control and Power Supply System Including the Same | |
| CN105186859B (en) | Switching converter and method for discharging output terminal thereof | |
| US10910947B2 (en) | Single inductor multiple output regulator with hybrid negative and positive rail generation | |
| CN104836427A (en) | Switching regulator control circuit and switching regulator | |
| US20120026762A1 (en) | Pre-Bias Control for Switched Mode Power Supplies | |
| CN103117734A (en) | Peak detection circuit, input feed-forward compensating circuit and power factor correction circuit | |
| CN102891606B (en) | Switching power supply | |
| CN103023323A (en) | Average inductive current type voltage control method and variable reference voltage generating device used by method | |
| Luo | Switched-capacitorized DC/DC converters | |
| CN202565159U (en) | PFC control circuit capable of flexibly boosting voltage | |
| CN103516218B (en) | Power supply device | |
| CN108712067B (en) | Active filter circuit for inhibiting high-frequency voltage ripple output by switching power supply | |
| CN103296747A (en) | Uninterrupted power system | |
| CN203217411U (en) | Low-voltage stabilized power supply | |
| CN102843021A (en) | Peak suppression circuit and multiphase booster circuit with same | |
| CN103427619B (en) | The PFC control circuit that can boost flexibly and control method thereof | |
| KR101412352B1 (en) | Dc-dc convert | |
| CN102545579A (en) | Power factor correction pre-adjusting circuit and switch power source | |
| KR102003688B1 (en) | Multi-input single-inductor buck-boost converter | |
| US10211738B2 (en) | DC-DC conversion circuit system and forming method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211118 Address after: 518043 No. 01, 39th floor, building a, antuoshan headquarters building, No. 33, antuoshan Sixth Road, Xiang'an community, Xiangmihu street, Futian District, Shenzhen, Guangdong Province Patentee after: Huawei Digital Energy Technology Co.,Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |