US 11,817,792 B2
Switching-type regulation driver and regulation driving method thereof
Zhiyong Su, Hangzhou (CN); and Xiangyong Xu, Hangzhou (CN)
Assigned to JOULWATT TECHNOLOGY CO., LTD., Hangzhou (CN)
Filed by Joulwatt Technology Co., Ltd., Hangzhou (CN)
Filed on Oct. 29, 2021, as Appl. No. 17/515,382.
Claims priority of application No. 202011189366.X (CN), filed on Oct. 30, 2020.
Prior Publication US 2022/0140743 A1, May 5, 2022
Int. Cl. H02M 3/335 (2006.01)
CPC H02M 3/33592 (2013.01) 14 Claims
OG exemplary drawing
 
1. A switching-type regulation driver, comprising:
a transformer having a primary winding and a secondary winding;
a first transistor, wherein a first power end of the first transistor is connected to a dotted terminal of the primary winding, and a second power end of the first transistor is connected to a reference ground through a current sensing resistor;
a controller, connected to a control end and the second power end of the first transistor respectively, wherein the controller generates a first control signal to the control end of the first transistor;
a synchronous rectifier, having power ends respectively connected to a non-dotted terminal of the secondary winding and the reference ground;
a drive control module, connected to the control end of the synchronous rectifier and the non-dotted terminal of the secondary winding respectively,
wherein, the drive control module is connected to the power end of the synchronous rectifier that is connected to the non-dotted terminal of the secondary winding for detecting a target parameter of a voltage across both power ends of the synchronous rectifier when the synchronous rectifier disconnects a conductive path between the non-dotted terminal of the secondary winding and the reference ground, and when it is detected that the target parameter of the voltage at across both power ends of the synchronous rectifier meets a preset condition, the controller controls a switching action of the first transistor so that the primary winding transmits power to the secondary winding.