Synchronous rectifier control device and forward synchronous rectifier circuit
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United States of America Patent
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Jan 4, 2011
Grant Date -
Jun 25, 2009
app pub date -
Jun 11, 2008
filing date -
Dec 24, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed are a synchronous rectifier control device and a forward synchronous rectifier circuit. The synchronous rectifier control device is coupled with the secondary side of the forward synchronous rectifier circuit, comprising a condition detecting unit, a reference time circuit and a synchronous signal generator. The condition detecting unit receives at least one reference signal and a detecting signal in response to the condition of the secondary side of the forward synchronous rectifier circuit, and accordingly generates a first synchronous control signal. The reference time circuit is coupled with the condition detecting unit, and generates a reference time signal in response to the first synchronous control signal. The synchronous signal generator generates a second synchronous control signal in response to the first synchronous control signal and the reference time signal.
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