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

Claim 12:
13. A control method for controlling a synchronous rectifier of a synchronous rectification circuit, wherein the synchronous rectification circuit having a primary switch, the control method comprising:
generating a dynamic drain-source voltage threshold based on the drain-source voltage;
determining if the primary switch is in an on state by comparing the drain-source voltage with the dynamic drain-source voltage threshold;
detecting if the drain-source voltage is lower than a turn-on threshold; and
after the drain-source voltage reaches the dynamic drain-source voltage threshold, turning on the synchronous rectifier when the drain-source voltage is lower than the turn-on threshold.