Method and apparatus for reducing body diode conduction of synchronous rectifiers
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United States of America Patent
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-
Mar 3, 2009
Grant Date -
Feb 7, 2008
app pub date -
Aug 27, 2007
filing date -
Dec 2, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A circuit for controlling the operation of synchronous rectifiers. The circuit delays the turn-off of the synchronous rectifiers in accordance with the load current. The magnitude of the load current is examined to determine which of a plurality of delay elements is selected to delay turn-off of the synchronous rectifiers. Delay is accomplished by holding up for a predetermined time period one of a plurality of control signals utilized to determine when the synchronous rectifier should be turned-off.
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