A Study for Power Saving in the Stand-by of Active-Clamped Flyback Converter

C.-M. Kim, M.-C.Park, E.-H. Song, J.-H. Kim, and B.-D. Min (Korea)


Active-clamped flyback converter, Power Saving, ZVS.


This paper deals with power saving technique for the active-clamped flyback converter on no-load. Because of ZVS, the converter has high efficiency and represents low EMI characteristics. However, the ZVS operation leads to power loss under no-load condition. It is caused by conduction current through parasitic elements. To reduce conduction loss under no-load, the converter turns off the auxiliary switch and operates only flyback mode. A scheme of power saving at no-load is represented and verified through experimental results for 60W sample.

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