Integrated Buck-Flyback Converter as a High-Power-Factor Off-Line Power Supply

2008 ◽  
Vol 55 (3) ◽  
pp. 1090-1100 ◽  
Author(s):  
J.M. Alonso ◽  
M.A. Dalla Costa ◽  
C. Ordiz
Keyword(s):  
Power Factor ◽  
High Power ◽  
Power Supply ◽  
Flyback Converter ◽  
High Power Factor

scholarly journals Association Of An Interleaved Boost-flyback Converter And A Full Bridge Converter In A Soft-switching High Power Factor Power Supply

2004 ◽  
Vol 9 (2) ◽  
pp. 61-68
Author(s):  
Carlos Alberto Gallo ◽  
Fernando Lessa Tofoli ◽  
João Antonio Corrêa Pinto ◽  
Ernane Antônio Alves Coelho ◽  
Luiz Carlos de Freitas ◽  
...  
Keyword(s):  
Power Factor ◽  
High Power ◽  
Power Supply ◽  
Soft Switching ◽  
Flyback Converter ◽  
High Power Factor

scholarly journals Association Of An Interleaved Boost-flyback Converter And A Full Bridge Converter In A Soft-switching High Power Factor Power Supply

2004 ◽  
Vol 9 (2) ◽  
pp. 61-68
Author(s):  
Carlos Alberto Gallo ◽  
Fernando Lessa Tofoli ◽  
João Antonio Corrêa Pinto ◽  
Ernane Antônio Alves Coelho ◽  
Luiz Carlos de Freitas ◽  
...  
Keyword(s):  
Power Factor ◽  
High Power ◽  
Power Supply ◽  
Soft Switching ◽  
Flyback Converter ◽  
High Power Factor

A Universal-Input Single-Stag2e High-Power-Factor Power Supply for HB-LEDs Based on Integrated Buck–Flyback Converter

2011 ◽  
Vol 58 (2) ◽  
pp. 589-599 ◽  
Author(s):  
David Gacio ◽  
J. Marcos Alonso ◽  
Antonio J. Calleja ◽  
Jorge Garcia ◽  
Manuel Rico-Secades
Keyword(s):  
Power Factor ◽  
High Power ◽  
Power Supply ◽  
Flyback Converter ◽  
High Power Factor

scholarly journals A Novel Single-Switch Single-Stage LED Driver with Power Factor Correction and Current Balancing Capability

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1340
Author(s):  
Yih-Her Yan ◽  
Hung-Liang Cheng ◽  
Chun-An Cheng ◽  
Yong-Nong Chang ◽  
Zong-Xun Wu
Keyword(s):  
Power Factor ◽  
High Power ◽  
Pulse Width Modulation ◽  
Power Factor Correction ◽  
Harmonic Distortion ◽  
Boost Converter ◽  
Single Stage ◽  
Led Driver ◽  
Flyback Converter ◽  
High Power Factor

A novel single-switch single-stage high power factor LED driver is proposed by integrating a flyback converter, a buck–boost converter and a current balance circuit. Only an active switch and a corresponding control circuit are used. The LED power can be adjusted by the control scheme of pulse–width modulation (PWM). The flyback converter performs the function of power factor correction (PFC), which is operated at discontinuous-current mode (DCM) to achieve unity power factor and low total current harmonic distortion (THDi). The buck–boost converter regulates the dc-link voltage to obtain smooth dc voltage for the LED. The current–balance circuit applies the principle of ampere-second balance of capacitors to obtain equal current in each LED string. The steady-state analyses for different operation modes is provided, and the mathematical equations for designing component parameters are conducted. Finally, a 90-W prototype circuit with three LED strings was built and tested. Experimental results show that the current in each LED string is indeed consistent. High power factor and low THDi can be achieved. LED power is regulated from 100% to 25% rated power. Satisfactory performance has proved the feasibility of this circuit.

A universal-input high-power-factor power supply without electrolytic capacitor for multiple lighting LED lamps

2011 ◽  
Vol 41 (5) ◽  
pp. 514-534 ◽  
Author(s):  
Hongbo Ma ◽  
Jih-Sheng Jason Lai ◽  
Quanyuan Feng ◽  
Wensong Yu ◽  
Cong Zheng
Keyword(s):  
Power Factor ◽  
High Power ◽  
Power Supply ◽  
Electrolytic Capacitor ◽  
High Power Factor

A Novel High Power Factor Soft-Switching Converter

2012 ◽  
Vol 433-440 ◽  
pp. 5549-5555
Author(s):  
Yun Tao Yue ◽  
Yan Lin
Keyword(s):  
Power Factor ◽  
High Power ◽  
Power Supply ◽  
High Efficiency ◽  
Soft Switching ◽  
Switching Converter ◽  
Turn On ◽  
High Power Factor ◽  
Power Factor Corrector ◽  
Zero Voltage

A novel scheme of low power communication power supply with high power factor and soft-switching is presented, a power factor corrector and dc/dc converter of passive lossless soft-switching is based on a ML4803 IC control. DC/DC converter introduces a novel two-transistor forward soft-switching technique, which realizes zero-voltage turn-on and turn-off, with no additional switches. a communication power supply module is developed in this paper. It has the characteristics of rapid dynamic response, high power factor, high efficiency and small bulk ect.

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