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1. (WO2018166449) SHORT-CIRCUIT PROTECTION CIRCUIT, POWER ADAPTER, AND MOBILE TERMINAL

Pub. No.:    WO/2018/166449    International Application No.:    PCT/CN2018/078872
Publication Date: Fri Sep 21 01:59:59 CEST 2018 International Filing Date: Wed Mar 14 00:59:59 CET 2018
IPC: H02H 3/087
H02J 7/02
Applicants: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
广东欧珀移动通信有限公司
Inventors: YANG, Bo
杨波
Title: SHORT-CIRCUIT PROTECTION CIRCUIT, POWER ADAPTER, AND MOBILE TERMINAL
Abstract:
A short-circuit protection circuit (10), a power adapter, and a mobile terminal. The short-circuit protection circuit comprises a switch device (11), a control circuit (12), an acquisition circuit (13), a reference circuit (14), and a current transformer (15). A first end (111) of the switch device (11) is connected with a high-voltage reference ground end of the power adapter; a second end (112) of the switch device (11) is connected with a first end of a first capacitor (C1) of the power adaptor by means of an input coil (51) of the current transformer (15); a second end of the first capacitor (C1) is connected with a low-voltage reference ground end or low-voltage positive electrode of the power adapter; a third end (113) of the switch device (11) is connected with a control end (123) of the control circuit (12); a first detection end (121) of the control circuit (12) is connected with an output end (132) of the acquisition circuit (13); a first input end (131) of the acquisition circuit (13) is connected to one end of an output coil (52) of the current transformer (15); a second input end (133) of the acquisition circuit (13) is connected to the other end of the output coil (52) of the current transformer (15); a second detection end (122) of the control circuit (12) is connected with an output end (141) of the reference circuit (14). The present short-circuit protection circuit, power adapter, and mobile terminal can be used for preventing the danger of an electrical shock when a power adaptor charges a mobile terminal.