CPC H02M 3/33592 (2013.01) [H02M 1/08 (2013.01); H02M 1/0025 (2021.05)] | 19 Claims |
1. A drain-source threshold setting circuit to control a synchronous rectifier, comprising:
a capacitor;
an amplifier, configured to receive a drain-source voltage across the synchronous rectifier and a capacitor voltage across the capacitor, and to provide a first current to charge the capacitor based on an amplified error between the drain-source voltage and the capacitor voltage;
a buffer circuit, configured to receive the capacitor voltage, and to provide a dynamic drain-source voltage threshold based on the capacitor voltage; and
a discharging circuit, configured to receive the drain-source voltage and the dynamic drain-source voltage threshold, and to discharge the capacitor based on a comparison result of the drain-source voltage and the dynamic drain-source voltage threshold.
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