Design and implementation of a high-efficiency 240-W power supply for PC applications

Author

Po-Jung Tseng ; Shih-Jen Cheng ; Chung-Yi Lin ; Shu-Wei Kuo ; Yu-Kang Lo ; Huang-Jen Chiu

Author_Institution

Dept. of Electron. Eng., NTUST, Taipei, Taiwan

fYear

2012

fDate

27-29 March 2012

Firstpage

1

Lastpage

6

Abstract

This paper presents a high-efficiency power supply topology. The front stage is a power factor corrector (PFC) utilizing the single-ended primary inductor converter (SEPIC) topology. The presented SEPIC PFC is operated under continuous conduction mode (CCM) with a transition-mode (TM) PFC controller and coupled inductors. The input current waveform remains continuous to reduce the size of the EMI filter and increase the power density. Due to the inherent voltage step- up/down features of the SEPIC PFC, the input voltage of the post-stage half-bridge series resonant converter (HB-SRC) can be decreased to reduce the voltage stresses on the power switches. High efficiency and low cost can be achieved. Circuit topologies and design considerations for the studied high-performance power supply are analyzed and discussed in detail. High-efficiency requirements for the Energy Star standards can be satisfied.

Keywords

computer power supplies; electromagnetic interference; filters; inductors; microcomputers; network topology; power factor correction; resonant power convertors; switches; CCM; EMI filter; Energy Star standard; PC application; SEPIC topology; TM PFC controller; continuous conduction mode; coupled inductor; high-efficiency power supply topology; inherent voltage step-up-down feature; input current waveform; post-stage HB-SRC; post-stage half-bridge series resonant converter; power 240 W; power density; power factor corrector; power switch; single-ended primary inductor converter topology; size reduction; transition-mode PFC controller; voltage stress reduction; SEPIC power factor corrector; continuous conduction mode; coupled inductors; half-bridge series resonant converter; transition mode;

fLanguage

English

Publisher

iet

Conference_Titel

Power Electronics, Machines and Drives (PEMD 2012), 6th IET International Conference on

Conference_Location

Bristol

Electronic_ISBN

978-1-84919-616-1

Type

conf

DOI

10.1049/cp.2012.0193

Filename

6242042