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高侧NMOS如何驱动

问题:我想通过NMOS来控制 电源 与 负载设备之间的开关,电路如何设计?

要求:当MOS打开时,负载有电,当MOS关闭时负载上的电压为零,

         不要用PMOS的方案,因为MOS有体二极管,此时即使PMOS关掉,二极管也会给负载供电