Design considerations and performance evaluations of synchronous rectification in flyback converters

Author

Zhang, Michael T. ; Jovanovic, Milan M. ; Lee, Fred C Y

Author_Institution

Platform Archit. Lab., Intel Corp., Hillsboro, OR, USA

Volume

13

Issue

3

fYear

1998

fDate

5/1/1998 12:00:00 AM

Firstpage

538

Lastpage

546

Abstract

Design tradeoffs and performance comparisons of various implementations of the flyback converter with a synchronous rectifier (SR) are presented. Specifically, the merits and limitations of the constant-frequency (CF) continuous-conduction mode (CCM), CF discontinuous-conduction mode (DCM), variable-frequency (VF) DCM, and zero-voltage-switched (ZVS) DCM flyback converters with SRs are discussed. The theoretical efficiency improvements of the discussed synchronous rectification approaches relative to Schottky diode implementations are derived. Finally, theoretical results are verified on an experimental universal-input off-line 15 V/36 W flyback prototype

Keywords

Schottky diodes; power convertors; rectification; rectifying circuits; switching circuits; 15 V; 36 W; Schottky diode implementations; ZVS; constant-frequency continuous-conduction mode; discontinuous-conduction mode; flyback converters; synchronous rectification; synchronous rectifier; theoretical efficiency improvements; variable-frequency; zero-voltage-switched; Immune system; Laboratories; Power electronics; Power supplies; Prototypes; Rectifiers; Schottky diodes; Strontium; Switches; Zero voltage switching;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.668117

Filename

668117