Current-driven synchronous rectification technique for flyback topology

For low voltage, high current application, synchronous rectification technique can help improve efficiency in a flyback converter. This paper investigates some technical challenges within a synchronous rectification flyback converter. One of the major problems is that the discontinuous current mode...

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Published in2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230) Vol. 1; pp. 345 - 350 vol. 1
Main Authors Xuefei Xie, Liu, J.C.P.L., Poon, F.N.K., Man Hay Pong
Format Conference Proceeding
LanguageEnglish
Published IEEE 2001
Subjects
Capacitors
Circuit topology
Flyback transformers
Inductance
Low voltage
Magnetic analysis
Performance analysis
Rectifiers
Strontium
Switches
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Summary:For low voltage, high current application, synchronous rectification technique can help improve efficiency in a flyback converter. This paper investigates some technical challenges within a synchronous rectification flyback converter. One of the major problems is that the discontinuous current mode (DCM) operation is not achievable with a control-driven or self-driven synchronous rectifier. Continuous current mode operation may introduce excessive RMS current and circulation energy at light load or high line condition. To solve this problem, we propose to use an energy recovery current-driven synchronous rectifier for flyback topology. Analysis and experiments demonstrate the performance of this approach.
ISBN:0780370678
9780780370678
ISSN:0275-9306
2377-6617
DOI:10.1109/PESC.2001.954044