公开(公告)号：US20230070676A1

公开(公告)日：2023-03-09

申请号：US17840556

申请日：2022-06-14

Applicant: Richtek Technology Corporation

Inventor： Hsuan-Kai Wang ,  Hsien-Chih She ,  Po-Cheng Liu

IPC: H02J7/00 ,  H02J7/04 ,  G01R31/3835

Abstract: A charger circuit includes: a power stage circuit configured to operate at least one power switch according to an operation signal, so as to convert an input power to a charging power to charge a battery; a control circuit coupled to the power stage circuit and configured to generate the operation signal according to a current feedback signal and a voltage feedback signal; a voltage feedback circuit configured to compare a voltage sensing signal related to a charging voltage of the charging power with a voltage reference level, so as to generate the voltage feedback signal; a battery core voltage drop sensing circuit coupled to a battery core of the battery and configured to sense a battery core voltage drop of the battery core, so as to generate a battery core voltage drop sensing signal; and an adjustment circuit coupled to the battery core voltage drop sensing circuit and configured to generate an adjustment signal according to the battery core voltage drop sensing signal, so as to adaptively adjust the voltage reference level.