Invention Application
US20050024897A1 Synchronized rectifying controller for a forward power converter 审中-公开
用于正向功率转换器的同步整流控制器

Synchronized rectifying controller for a forward power converter
Abstract:
The present invention provides a forward power converter with a synchronized rectifying controller. The synchronized rectifying controller has a detection input for detecting the voltage of a secondary winding of a transformer, and thereby accurately measuring the PWM signal. Based on this measurement, the synchronized rectifying controller generates control signals for two secondary-side rectifying MOSFETs. The present invention also introduces a delay time using a timing resistor coupled to the synchronized rectifying controller. This avoids cross-conduction from secondary-side MOSFETs. The present invention also includes an output current-sense mechanism to avoid reverse inductor currents under light-load conditions.
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