US Patent No. 10,992,234

ADAPTIVE CONTROL OF SYNCHRONOUS RECTIFIER SWITCHING DEVICE


Patent No. 10,992,234
Issue Date April 27, 2021
Title Adaptive Control Of Synchronous Rectifier Switching Device
Inventorship Sangcheol Moon, Bucheon-si (KR)
Jintae Kim, Seongnam-si (KR)
Chi-Chen Chung, Zhubei (TW)
Cheng-Sung Chen, Hsinchu (TW)
Assignee SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US)

Claim of US Patent No. 10,992,234

1. A circuit for controlling a power converter, the circuit comprising:a synchronous rectifier (SR) switching device;
a light load detection circuit configured to generate a load detection signal in response to a conduction signal and an operation mode signal; and
an SR driver configured to generate a control signal according to the load detection signal and a gate signal and to provide the control signal to the SR switching device,
wherein the SR driver generates the control signal having a first value when the light load detection signal is de-asserted and the gate signal is asserted to turn on the SR switching device, and the SR driver generates the control signal having a second value when the light load detection signal is asserted and the gate signal is asserted to turn on the SR switching device, the second value being less than the first value.