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单片机IO口控制12V电压通断,MOS和三极管电路
2022-07-28 06:20:00 【ltqshs】


POWER_EN为高电平时,Q2导通,使得Q1sg两端有压差,达到Q1的导通电压,此时Vin输出到Vout,这个Vin可以是12V
POWER_EN为低电平时,Q2截止,使得Q1sg两端没有压差,Q1截止,此时Vout没有电压。
这样就达到了控制12V通断的要求,当然这个Q1的选型需要参考这个12V的供电电流来选型,如果电流大,需要选择Is大的MOS管。
另外,也可以选择用继电器来控制12V的电压通断。
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