An improved novel driving scheme of synchronous rectifiers for LLC resonant converters

Author

Fu, Dianbo ; Liu, Ya ; Lee, Fred C. ; Xu, Ming

Author_Institution

Center for Power Electron. Syst., Virginia Polytech. Inst. & State Univ., Blacksburg, VA

fYear

2008

fDate

24-28 Feb. 2008

Firstpage

510

Lastpage

516

Abstract

This paper proposes an improved novel synchronous rectifier (SR) driving scheme for resonant converters. It is very suitable for high frequency, high efficiency and high power density dc-dc resonant converters with SRs. An LLC resonant converter with proposed synchronous rectification is designed and analyzed. With proposed driving scheme, SR body diode conduction is almost reduced to none. The reverse recovery problem of SRs is eliminated. Both current and voltage stress are greatly decreased. Conduction loss and switching loss of SRs are considerably reduced. The experimental results show that the proposed LLC resonant converter with SR can achieve low stresses, high efficiency and high power density.

Keywords

DC-DC power convertors; driver circuits; rectifying circuits; resonant power convertors; switching convertors; LLC resonant converters; conduction loss; current-voltage stress; diode conduction; high power density dc-dc resonant converters; reverse recovery problem; switching loss; synchronous rectifier driving scheme; Computer applications; DC-DC power converters; Diodes; Rectifiers; Resonance; Strontium; Switches; Switching converters; Switching loss; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2008. APEC 2008. Twenty-Third Annual IEEE

Conference_Location

Austin, TX

ISSN

1048-2334

Print_ISBN

978-1-4244-1873-2

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2008.4522769

Filename

4522769