公开(公告)号：US20200014294A1

公开(公告)日：2020-01-09

申请号：US16371851

申请日：2019-04-01

Applicant: QUALCOMM Incorporated

Inventor： Chunping SONG ,  Ye Ming LI ,  Guoyong GUO

IPC: H02M1/32 ,  H02J7/00 ,  H02M3/158

Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for providing surge protection for a switched-mode power supply (SMPS), such as a SMPS used in a battery-charging circuit. One example surge protection circuit generally includes an input node; an output node; a reference potential node; a transistor coupled between the input node and the output node; a diode device having an anode coupled to the input node and a cathode coupled to a control node of the transistor; a voltage-clamping circuit coupled between the output node and the control node; and a first switch coupled between the control node of the transistor and the reference potential node.