公开(公告)号：US20250030345A1

公开(公告)日：2025-01-23

申请号：US18713089

申请日：2022-09-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryusuke KANOMATA ,  Shinji UJITA ,  Kenichiro TANAKA ,  Takeshi NAKAYASHIKI ,  Takayuki HIROKAWA

IPC: H02M3/158 ,  H02M1/00 ,  H02M7/44

Abstract: The power conversion device can undergo autonomous search control for ZVS without a larger circuit area or lower reliability. The power conversion device performs, in each switching cycle, an operation of turning the control switch (CTLSW) on and afterward off while the synchronous rectification switch (SRSW) is off, and then turning the synchronous rectification switch on and afterward off while the control switch is off. Whether the inductor current (iL) is positive or negative is detected at the detection timing backed by a predetermined period (Text) from a timing at which the synchronous rectification switch switches from on to off, based on the detection result, the on-period (TOFF) of the synchronous rectification switch is corrected.