CA2575716A1 - Master slave critical conduction mode power converter - Google Patents

Master slave critical conduction mode power converter

Info

Publication number
CA2575716A1
CA2575716A1 CA002575716A CA2575716A CA2575716A1 CA 2575716 A1 CA2575716 A1 CA 2575716A1 CA 002575716 A CA002575716 A CA 002575716A CA 2575716 A CA2575716 A CA 2575716A CA 2575716 A1 CA2575716 A1 CA 2575716A1
Authority
CA
Canada
Prior art keywords
power source
power
switching
frequency
event
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
Application number
CA002575716A
Other languages
French (fr)
Other versions
CA2575716C (en
Inventor
Arian Jansen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MYPAQ HOLDINGS Ltd
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2575716A1 publication Critical patent/CA2575716A1/en
Application granted granted Critical
Publication of CA2575716C publication Critical patent/CA2575716C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/102—Parallel operation of dc sources being switching converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Power Conversion In General (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Ac-Ac Conversion (AREA)
  • Rectifiers (AREA)
  • Inverter Devices (AREA)

Abstract

A system and a method for to use multiple power sources for supplying power to a load. The system and method use a triggering system to automatically and substantially cancel a ripple component of the input current drawn by the system. A master power source and a slave power source supply power to the load. The triggering system results in the two power sources having switching frequencies that are substantially equal and switching cycles that are substantially 180° out of phase. Further, the method and the device contemplate the use of a local oscillator in the triggering system to ensure that the slave power source is triggered to the on position at a point in the switching cycle of the master power source that is approximately 180° out of phase with a leading edge of the master switching drive signal. The system and method are advantageously used to provide a power factor correction front-end for a switch-mode power supply. Power supplies with a diverse array of relationships between power supplied and switching frequency can be used.

Claims (35)

1. A system for supplying power to a load, the system comprising:
a. a first and a second power source, each having a control system;

b. means for detecting a switch-off event in the first power source and subsequently triggering a switch-on event in the second power source, the means comprising means for directly supplying a first signal to both a switch of the first power source and to the control system of the second power source;
and c. a feedback mechanism configured to monitor a switching state of the second power source and to continuously adjust a duty cycle of the second power source according to the switching state, wherein the feedback mechanism is further configured to trigger a switch-off event in the second power source when a residual power supply current within the second power source is substantially equal to zero, wherein the first and second power source have similar noise characteristics.
2. The system of claim 1, wherein the first power source has a switching waveform comprising a frequency and a duty cycle, further wherein the duty cycle is modulated by a first feedback system taking inputs comprising a signal proportional to the power supplied by the system, further wherein the frequency is determined by a second feedback system taking inputs comprising a signal proportional to a power supply current present in the first power source.
3. The system of claim 2, wherein the second feedback system comprises means for detecting the absence of the power supply current in the first power source and subsequently signaling the control system of the first power source to trigger the switch-off event of the first power source.
4. The system of claim 3, wherein the subsequent signaling of the control system comprises means for delaying the signaling to take advantage of a known oscillatory behavior of the power supply current in the first power source so that a voltage across a switching element of the first power source is minimized.
5. The system of claim 1, wherein the second power source has a switching waveform comprising a frequency and a duty cycle, wherein the frequency is determined by the triggering of a switch-on event in the second power source, further wherein the duty cycle is modulated by a third feedback system taking inputs comprising a signal proportional to a power supply current present in the second power source, a signal proportional to the power supplied by the system, and a desired switching event.
6. The system of claim 5, wherein the desired switching event is indirectly triggered by the switch-off event in the first power source.
7. The system of claim 6, wherein the third feedback system is configured to determine a difference between the desired switching event and the power supply current in the second power source, wherein the control system uses a signal representative of the difference to continuously adjust the duty cycle of the second power source.
8. A system for supplying power to a load, the system comprising:
a. a first and a second power source, each having a control system; and, b. means for detecting a switch-off event in the first power source and subsequently triggering a switch-on event in the second power source, wherein the means for detecting comprises means for directly supplying a first signal to both a switch of the first power source and to an oscillator circuit coupled between the first power source and the second power source responsible for then supplying a control signal to the control system of the second power source, wherein the oscillator circuit includes a voltage controlled oscillator configured to receive the first signal from the first power source and to generate the control signal such that a frequency of the control signal is equal to a frequency of the first signal;

wherein the first and second power source have similar noise characteristics.
9. The system of claim 8, wherein the control signal has a waveform with substantially the same frequency as a waveform of the first power source, also substantially 180°
out of phase with the first power source, and with a duty cycle that is substantially 50%.
10. The system of claim 8, wherein the first power source has a switching waveform comprising a frequency and a duty cycle, further wherein the duty cycle is modulated by a first feedback system taking inputs comprising a signal proportional to the power supplied by the system, further wherein the frequency is determined by a second feedback system taking inputs comprising a signal proportional to a power supply current present in the first power source.
11. The system of claim 10, wherein the second feedback system comprises means for detecting the absence of the power supply current in the first power source and subsequently signaling the control system of the first power source to trigger the switch-off event of the first power source.
12. The system of claim 11 wherein the subsequent signaling of the control system comprises means for delaying the signaling to take advantage of a known oscillatory behavior of the power supply current in the first power source so that a voltage across a switching element of the first power source is minimized.
13. The system of claim 8 wlierein the second power source has a switching waveform comprising a frequency and a duty cycle wherein the frequency is determined by the triggering of a switch-on event in the second power source, further wherein the duty cycle is modulated by a third feedback system taking inputs comprising a signal proportional to a power supply current present in the second power source, a signal proportional to the power supplied by the system, and a desired switching event.
14. The system of claim 13, wherein the desired switching event is indirectly triggered by the switch-off event in the first power source.
15. The system of claim 14, wherein the third feedback system is configured to determine a difference between the desired switching event and a power supply current in the second power source, wherein the control system uses a signal representative of the difference to continuously adjust the duty cycle of the second power source.
16. The system of claim 14, wherein the third feedback system further comprises means for preventing switching from occurring when the power supply current in the second power supply is greater than zero.
17. A system for providing power factor correction to a power supply, the system comprising:

a. first and second power sources, wherein each power source has a similar relationship between the power supplied by the power source and the switching frequency of the power source, further wherein each power source has similar characteristic noise in the output of the power source;

b. means for detecting a switch-off event in the first power source and subsequently generating a first signal with a first frequency for triggering a switch-on event in the second power source;

c. means for modulating the duty cycle of the second power source according to present characteristics of the second power source; and d. an oscillating circuit including a voltage controlled oscillator configured to receive the first signal and to generate a control signal with a second frequency for triggering the switch-on event in the second power source, wherein the first frequency is equal to the second frequency.
18. The system of claim 17, wherein the means for detecting comprises means for directly supplying the first signal to both a switch of the first power source and to the oscillating circuit.
19. The system of claim 18, wherein the first power source has a switching waveform comprising a frequency and a duty cycle further wherein the duty cycle is modulated by a first feedback system taking inputs comprising a signal proportional to the power supplied by the system, further wherein the frequency is determined by a second feedback system taking inputs comprising a signal proportional to a power supply current present in the first power source.
20. The system of claim 19, wherein the second feedback system comprises means for detecting the absence of the power supply current in the first power source and subsequently signaling the control system of the first power source to trigger the switch-off event of the first power source.
21. The system of claim 20, wherein the subsequent signaling of the control system comprises means for delaying the signaling to take advantage of a known oscillatory behavior of the power supply current in the first power source so that a voltage across a switching element of the first power source is minimized.
22. The system of claim 18, wherein the second power source has a switching waveform comprising a frequency and a duty cycle, wherein the frequency is determined by the triggering of a switch-on event in the second power source, further the means for modulating the duty cycle of the second power source is a third feedback system taking inputs comprising a signal proportional to a power supply current present in the second power source, a signal proportional to the power supplied by the system, and a desired switching event.
23. The system of claim 22, wherein the desired switching event is indirectly triggered by the switch-off event in the first power source.
24. The system of claim 23 wherein, the third feedback system is configured to determine a difference between the desired switching event and a power supply current in the second power source, wherein the control system uses a signal representative of the difference to continuously modulate the duty cycle of the second power source.
25. (Cancel)
26. The system of claim 24, wherein the control system has a waveform with substantially the same frequency as a waveform of the first power source, also substantially 180°
out of phase with the first power source, and with a duty cycle that is substantially 50%.
27. (Cancel)
28. (Cancel)
29. (Cancel)
30. (Cancel)
31. (Cancel)
32. (Cancel)
33. The system of claim 24, wherein the third feedback system further comprises means for preventing switching from occurring when the power supply current in the second power source is greater than zero.
34. A method for providing power factor correction to a power supply, the method comprising:

a. coupling a first and a second power source so that both power sources receive power from the same source and output power to the same load; wherein the first power source has a first switching cycle and the second power source has a second switching cycle;

b. configuring the first power source to be self-resonant such that the first power source determines a switching frequency of the first switching cycle;

c. configuring the second power source to switch-on when the first power source switches off, whereby the second switching cycle of the second power source has a switching frequency approximately equal to the switching frequency of the first power source; and, d. modulating a duty cycle of the second power source so that a switch-off event of the second power source occurs when a power supply current within the second power source is substantially equal to zero.
35. A method for providing power factor correction to a power supply, the method comprising:

a. coupling a first and a second power source so that both power sources receive power from the same source and output power to the same load; wherein both power sources have a switching cycle;

b. configuring the first power source in a self-resonant way such that it determines a switching frequency for its own switching cycle;

c. configuring a local oscillator to produce a waveform with a duty cycle of approximately 50% at a frequency equal to the switching frequency of the first power source and further in phase alignment with the switching frequency of the first power source;

d. configuring the second power source to operate at a switching frequency approximately 180° out of phase with the waveform produced by the local oscillator, whereby the switching cycle of the second power source has a switching frequency approximately equal to the switching frequency of the first power source and approximately 180° out of phase with the switching frequency of the first power source; and, e. modulating a pulse width of the second power source so that the switch-off event of the second power source occurs at an optimal time relative to a current that exists in the second power source.
CA2575716A 2004-09-07 2005-09-07 Master slave critical conduction mode power converter Active CA2575716C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US60950804P 2004-09-07 2004-09-07
US60/609,508 2004-09-07
US11/220,876 2005-09-06
US11/220,876 US7205752B2 (en) 2004-09-07 2005-09-06 Master-slave critical conduction mode power converter
PCT/US2005/032170 WO2006029323A2 (en) 2004-09-07 2005-09-07 Master slave critical conduction mode power converter

Publications (2)

Publication Number Publication Date
CA2575716A1 true CA2575716A1 (en) 2006-03-16
CA2575716C CA2575716C (en) 2010-12-21

Family

ID=36037021

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2575716A Active CA2575716C (en) 2004-09-07 2005-09-07 Master slave critical conduction mode power converter

Country Status (7)

Country Link
US (1) US7205752B2 (en)
EP (1) EP1800198B1 (en)
JP (1) JP4897686B2 (en)
AT (1) ATE487173T1 (en)
CA (1) CA2575716C (en)
DE (1) DE602005024593D1 (en)
WO (1) WO2006029323A2 (en)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7777422B2 (en) 2005-08-24 2010-08-17 Mitsubishi Electric Corporation DC/DC converter device and discharge lamp lighting device
US7795850B2 (en) * 2005-09-30 2010-09-14 Volterra Semiconductor Corporation Analog current command and settable slopes in voltage regulator
US7688607B2 (en) 2005-09-30 2010-03-30 Volterra Semiconductor Corporation Voltage regulator with inductor banks
US7522436B2 (en) 2005-09-30 2009-04-21 Volterra Semiconductor Corporation Master-slave with adaptation control including slave current checking
US7514909B2 (en) * 2005-09-30 2009-04-07 Voiterra Semiconductor Corporation Voltage regulator with communication ring scheme
US7911440B2 (en) * 2006-04-13 2011-03-22 Lg Display Co., Ltd. Apparatus and method for driving backlight of liquid crystal display apparatus
JP4850915B2 (en) * 2006-09-14 2012-01-11 ルネサスエレクトロニクス株式会社 PFC controller, switching regulator and power supply circuit
CN101217255B (en) * 2008-01-16 2010-12-22 艾默生网络能源有限公司 A PFC circuit with current sharing control module and the corresponding current sharing control method
US7881079B2 (en) * 2008-03-24 2011-02-01 American Power Conversion Corporation UPS frequency converter and line conditioner
US7884588B2 (en) * 2008-04-10 2011-02-08 Stmicroelectronics S.R.L. Control method and device for a system of interleaved converters using a designated master converter
US20100039088A1 (en) * 2008-08-15 2010-02-18 System General Corp. Interleaved slave switching circuit for discontinuous mode pfc converter
JP5402268B2 (en) * 2008-10-16 2014-01-29 富士電機株式会社 Interleave control power supply device, control circuit for the power supply device, and control method
TWI401867B (en) * 2008-11-26 2013-07-11 Spi Electronic Co Ltd Phase shift control method of boost converter
US8072193B2 (en) * 2009-01-21 2011-12-06 Fsp Technology Inc. Phase shift control method for boost converter and circuit implementation
JP2010233439A (en) * 2009-03-03 2010-10-14 Toshiba Corp Power supply control device, and power supply apparatus using the same
NL2003293C2 (en) * 2009-07-27 2011-01-31 Intivation Holding B V Dc-dc voltage converter having off-phase controlled parallel switching branches.
US8648496B2 (en) 2010-11-11 2014-02-11 The Boeing Company Reconfigurable microgrid direct current interface
CN102684464B (en) * 2011-03-15 2016-03-09 雅达电子国际有限公司 Resonant converter device and the method for resonant converter device
FR2973965B1 (en) * 2011-04-08 2013-10-25 Continental Automotive France ELECTRONIC CIRCUIT TWO STATIC CONVERTERS FUNCITATING IN QUASI-RESONANT MODE BY ZERO VOLTAGE SWITCHING AND METHOD OF OPERATING SUCH CIRCUIT
JP5842465B2 (en) * 2011-08-29 2016-01-13 株式会社リコー Power supply
US9019726B2 (en) 2012-07-13 2015-04-28 Flextronics Ap, Llc Power converters with quasi-zero power consumption
US9312775B2 (en) 2012-08-15 2016-04-12 Flextronics Ap, Llc Reconstruction pulse shape integrity in feedback control environment
IN2015DN02761A (en) * 2012-09-28 2015-09-04 Fluidic Inc
US9270201B1 (en) * 2012-10-25 2016-02-23 mPower Solar Inc. Solar inverter
US9356537B2 (en) 2012-10-25 2016-05-31 SunEdison Microinverter Products LLC Slave circuit for distributed power converters in a solar module
US9379641B2 (en) 2012-10-25 2016-06-28 SunEdison Microinverter Products LLC Energy recovery circuit for distributed power converters in solar cells
US10027114B2 (en) 2012-10-25 2018-07-17 Mpowersolar Inc. Master slave architecture for distributed DC to AC power conversion
US9343957B1 (en) * 2013-01-29 2016-05-17 Marvell International Ltd. Multi-converter system including a power distribution balancing circuit and operating method thereof
US9268347B2 (en) 2013-02-12 2016-02-23 International Business Machines Corporation Implementing dynamic regulator output current limiting
US9494658B2 (en) 2013-03-14 2016-11-15 Flextronics Ap, Llc Approach for generation of power failure warning signal to maximize useable hold-up time with AC/DC rectifiers
US9323267B2 (en) 2013-03-14 2016-04-26 Flextronics Ap, Llc Method and implementation for eliminating random pulse during power up of digital signal controller
US9184668B2 (en) 2013-03-15 2015-11-10 Flextronics Ap, Llc Power management integrated circuit partitioning with dedicated primary side control winding
US9627915B2 (en) 2013-03-15 2017-04-18 Flextronics Ap, Llc Sweep frequency mode for multiple magnetic resonant power transmission
TWI511426B (en) * 2013-08-30 2015-12-01 Anpec Electronics Corp Modulation method, modulation module thereof and voltage converting device thereof
US9722494B2 (en) * 2015-04-30 2017-08-01 Stmicroelectronics S.R.L. Controller for multiphase boost converters
US10491106B2 (en) * 2017-08-09 2019-11-26 Microchip Technology Incorporated Digital control of switched boundary mode interleaved power converter
US10727735B2 (en) 2017-08-09 2020-07-28 Microchip Technology Incorporated Digital control of switched boundary mode interleaved power converter with reduced crossover distortion
US10491131B2 (en) 2017-08-09 2019-11-26 Microchip Technology Limited Digital control of switched boundary mode power converter without current sensor
US10756627B2 (en) * 2017-09-14 2020-08-25 Microchip Technology Incorporated Enhanced switching regulator topology with adaptive duty control and seamless transition of operating modes
US10432085B2 (en) 2017-10-23 2019-10-01 Microchip Technology Incorporated Digital control of switched boundary mode PFC power converter for constant crossover frequency
JP7082758B2 (en) * 2019-05-15 2022-06-09 株式会社オートネットワーク技術研究所 Voltage regulator and backup power supply for vehicles
CN112152454B (en) * 2020-09-23 2021-09-28 南京信息工程大学 Boost PFC converter integrating Boost and buck output and control method

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04217869A (en) * 1990-12-20 1992-08-07 Nemitsuku Ramuda Kk Power supply
US5565761A (en) * 1994-09-02 1996-10-15 Micro Linear Corp Synchronous switching cascade connected offline PFC-PWM combination power converter controller
US5747977A (en) * 1995-03-30 1998-05-05 Micro Linear Corporation Switching regulator having low power mode responsive to load power consumption
US5592128A (en) * 1995-03-30 1997-01-07 Micro Linear Corporation Oscillator for generating a varying amplitude feed forward PFC modulation ramp
US5742151A (en) * 1996-06-20 1998-04-21 Micro Linear Corporation Input current shaping technique and low pin count for pfc-pwm boost converter
US5804950A (en) * 1996-06-20 1998-09-08 Micro Linear Corporation Input current modulation for power factor correction
JP3570113B2 (en) * 1996-10-17 2004-09-29 松下電器産業株式会社 Interleaved switching converter
US5905369A (en) * 1996-10-17 1999-05-18 Matsushita Electric Industrial Co., Ltd. Variable frequency switching of synchronized interleaved switching converters
JPH10243640A (en) * 1997-02-25 1998-09-11 Funai Electric Co Ltd Step-up chopper type switching power supply
US6344980B1 (en) * 1999-01-14 2002-02-05 Fairchild Semiconductor Corporation Universal pulse width modulating power converter
US6091233A (en) * 1999-01-14 2000-07-18 Micro Linear Corporation Interleaved zero current switching in a power factor correction boost converter
JP2000253648A (en) * 1999-03-02 2000-09-14 Nec Corp Dc-dc converter circuit
US6160725A (en) * 1999-03-12 2000-12-12 Nmb Usa Inc. System and method using phase detection to equalize power from multiple power sources
JP2000083374A (en) * 1999-10-13 2000-03-21 Nippon Protector:Kk Switching regulator
US6452366B1 (en) * 2000-02-11 2002-09-17 Champion Microelectronic Corp. Low power mode and feedback arrangement for a switching power converter
US6531854B2 (en) * 2001-03-30 2003-03-11 Champion Microelectronic Corp. Power factor correction circuit arrangement
US6674272B2 (en) * 2001-06-21 2004-01-06 Champion Microelectronic Corp. Current limiting technique for a switching power converter
US6657417B1 (en) * 2002-05-31 2003-12-02 Champion Microelectronic Corp. Power factor correction with carrier control and input voltage sensing
JP4241027B2 (en) * 2002-12-24 2009-03-18 パナソニック電工株式会社 Power supply

Also Published As

Publication number Publication date
JP4897686B2 (en) 2012-03-14
EP1800198A2 (en) 2007-06-27
JP2008512982A (en) 2008-04-24
EP1800198B1 (en) 2010-11-03
ATE487173T1 (en) 2010-11-15
CA2575716C (en) 2010-12-21
US7205752B2 (en) 2007-04-17
WO2006029323A3 (en) 2006-11-23
WO2006029323A2 (en) 2006-03-16
US20060077604A1 (en) 2006-04-13
DE602005024593D1 (en) 2010-12-16
EP1800198A4 (en) 2008-03-26

Similar Documents

Publication Publication Date Title
CA2575716A1 (en) Master slave critical conduction mode power converter
KR100224103B1 (en) Power supply apparatus
WO2005055404A3 (en) Adaptive delay control circuit for switched mode power supply
TWI434503B (en) Power supply system and method for dynamic switch voltage control
US6713995B2 (en) Voltage regulator with pulse width modulation in dual frequencies
WO2004073149A3 (en) Digital signal processor architecture optimized for controlling switched mode power supply
WO2018010416A1 (en) Wireless charging circuit, wireless charging system, and circuit control method
US20090302774A1 (en) Control circuit and method for regulating average inductor current in a switching converter
WO2007003967A3 (en) Switch mode power supply control systems
WO2007130533A8 (en) Method and apparatus for improving light load efficiency in switching power supplies
TW200638661A (en) Circuit and method for controlling step-up/step-down DC-DC converter
KR20090084637A (en) Controller for use in a resonant direct current / direct current converter
KR20040080985A (en) Switching constant-current power supply system
TWI530076B (en) Power switch driving method
KR20130009604A (en) Controllers for power converters
US6924630B1 (en) Buck-boost power factory correction circuit
WO2003085813A3 (en) Line frequency switching regulator
JP5353406B2 (en) Switching power supply
TWI421663B (en) Master-slave critical conduction mode power converter
JP2003070242A (en) Switching regulator
US20040179320A1 (en) Arrangement comprising a microprocessor, a demagnetization circuit and a switched mode power supply, and a display unit comprising a respective arrangement
WO2019190317A8 (en) Led driver and method of operating an led driver
US5825103A (en) Voltage-suppressed voltage source with partial resonance circuit
US9323267B2 (en) Method and implementation for eliminating random pulse during power up of digital signal controller
JP2004040907A (en) Voltage transformer and controller used therefor

Legal Events

Date Code Title Description
EEER Examination request