Title :
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
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;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2008. APEC 2008. Twenty-Third Annual IEEE
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4244-1873-2
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2008.4522769
