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1. (WO2018040789) POWER SUPPLY PROTECTION CIRCUIT, METHOD AND DEVICE

Pub. No.:    WO/2018/040789    International Application No.:    PCT/CN2017/093893
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Sat Jul 22 01:59:59 CEST 2017
IPC: H02H 7/125
Applicants: ZTE CORPORATION
中兴通讯股份有限公司
Inventors: WANG, Pengchao
王鹏超
WANG, Hong
王鸿
GAO, Yanghuai
高养怀
LIU, Feng
刘锋
WANG, Fangchun
王方淳
YANG, Yundong
杨运东
Title: POWER SUPPLY PROTECTION CIRCUIT, METHOD AND DEVICE
Abstract:
A power supply protection circuit comprises: an auxiliary winding for sampling voltages at two ends of a capacitor in a switching power supply; a resistance-capacitance (RC) charging circuit connected to the auxiliary winding and used to convert voltages sampled by the auxiliary winding into current signals; and a control circuit used to control, according to the current signals, switching on and off of the switching power supply.