Disabling standby converter with phase-shifted full-bridge converter in server power supplies

Author

Jong-Woo Kim ; Duk-You Kim ; Chong-Eun Kim ; Jae-Hyun Kim ; Gun-Woo Moon

Author_Institution

Dept. of Electr. Eng., KAIST, Daejeon, South Korea

fYear

2013

fDate

3-6 June 2013

Firstpage

1005

Lastpage

1008

Abstract

This paper proposes to disable standby converter for improving the efficiency of a server computer power supply. By disabling the standby flyback converter after DC/DC stage is turned on, losses in standby flyback converter are removed in normal mode. When it is disabled, all outputs of the standby flyback converter are provided by phase-shifted full-bridge (PSFB) converter, so that the PSFB converter operates by itself. Since PSFB converter has much higher efficiency than the standby flyback converter, the system efficiency can be improved in the entire load condition. The feasibility of the proposed structure has been verified with 90-265V_rms, 400V link voltage, 12V/62.5A main output, and 12V/2.1A standby output server power system.

Keywords

DC-DC power convertors; computer power supplies; DC-DC stage; PSFB converter; current 2.1 A; current 62.5 A; phase-shifted full-bridge converter; server computer power supply efficiency; standby flyback converter; voltage 12 V; voltage 400 V; Government; Moon; phase-shifted full-bridge (PSFB) converter; server power supply; standby converter;

fLanguage

English

Publisher

ieee

Conference_Titel

ECCE Asia Downunder (ECCE Asia), 2013 IEEE

Conference_Location

Melbourne, VIC

Print_ISBN

978-1-4799-0483-9

Type

conf

DOI

10.1109/ECCE-Asia.2013.6579230

Filename

6579230