Power Select

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Revision as of 10:57, 25 January 2021 by Chao (talk | contribs) (Created page with "<gallery> File:Power-select-01.jpg | 01 File:Power-select-02.jpg | 02 </gallery> 01 * 5V 接入, 电池接入, 开关断开, G1, G2 高电平, S2 电平比D2 高, 体二极...")
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01

  • 5V 接入, 电池接入, 开关断开, G1, G2 高电平, S2 电平比D2 高, 体二极管截止, VGSM 没有电, 系统不工作, 只充电
  • 5V 接入, 电池接入, 开关闭合, G1 低电平, G2 高电平 , 5V 经SS24 送给VGSM, 系统工作, 充电
  • 5V 断开, 电池接入, 开关断开, G2 低电平, VBAT 流向S2, G1 高电平, VGSM 没有电, 系统不工作
  • 5V 断开, 电池接入, 开关闭合, G1. G2 低电平 , VBAT 流向S2, 再送给VGSM, 系统工作

02

  • 本电路可以实现,当接入一种电源后自动切换另一路电源,类似于UPS
  • VCC_4V5是直流电源,Battery为电池,VCC_IN为输出;当VCC_4V5存在时,自动断开Battery,当VCC_4V5,不存在时,自动使用Battery供电!