公开(公告)号：US20220321012A1

公开(公告)日：2022-10-06

申请号：US17711343

申请日：2022-04-01

Applicant: Richtek Technology Corporation

Inventor： Yong-Cyuan Chen ,  Tzu-Chen Lin ,  Yi-Wei Lee ,  Ta-Yung Yang

IPC: H02M3/158 ,  H02M1/00

Abstract: A switching regulator includes a first switch, a second switch, an inductor coupled to the first and second switches, and a control circuit. The control circuit controls the first switch to be ON for an ON time period. Next, the control circuit controls the first and second switches to be OFF for a first dead time period. Next, the control circuit controls the second switch to be ON for a synchronous rectification time period. Next, the control circuit controls the first and second switches to be OFF for a second dead time period. Next, the control circuit controls the second switch to be ON for a zero-voltage-switching pulse time period. Next, the control circuit controls the first and second switches to be OFF for a third dead time period. By the above operations, the first switch achieves soft switching.