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1. (CN205355935) 一种双电源自动切换供电及防止电源反接的电路

Office : China
Application Number: 202015001075240 Application Date: 22.12.2015
Publication Number: 205355935 Publication Date: 29.06.2016
Publication Kind : U
IPC:
H02J 9/06
H02H 11/00
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
J
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
9
Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
04
in which the distribution system is disconnected from the normal source and connected to a standby source
06
with automatic change-over
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
11
Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
Applicants: 上海爱信诺航芯电子科技有限公司
Inventors: 张松波
周玉洁
刘红明
Agents: 上海信好专利代理事务所(普通合伙) 31249
上海信好专利代理事务所(普通合伙) 31249
Priority Data:
Title: (ZH) 一种双电源自动切换供电及防止电源反接的电路
Abstract: front page image
(ZH) 本实用新型涉及一种双电源自动切换供电及防止电源反接的电路,其用于由单节内置锂电池供电的设备,包含:二极管,其正极端连接外部直流电源,通过二极管的单向导通特性实现外部直流电源对设备供电;PMOS晶体管,其漏极端连接设备内置的锂电池,栅极端连接外部直流电源,并通过电阻接地,通过反接的PMOS晶体管的寄生二极管特性实现锂电池对设备供电。本实用新型能有效降低锂电池的电源压降,减少其功率损耗,消除对设备正常工作的影响;同时还具有防止电源反接的功能,保护电路安全。