A synchronous rectification circuit for a DC-DC power converter can operate efficiently with a primary drive voltage that remains at a zero voltage level during a portion of the power conduction cycle. The DC-DC power converter includes a primary side power circuit providing a symmetrically varying power...http://www.google.es/patents/US6275401?utm_source=gb-gplus-sharePatente US6275401 - Self-driven synchronous rectification circuit for low output voltage DC-DC converters
Self-driven synchronous rectification circuit for low output voltage DC-DC ...
