Patent ID: 11909325
Assignee: CHENGDU MONOLITHIC POWER SYSTEMS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
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.