Title :
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
fDate :
5/1/1998 12:00:00 AM
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;
Journal_Title :
Power Electronics, IEEE Transactions on
