如题,BUCK模式时,输出侧高端NMOS自举电容无法充电,是如何实现常开的?
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HI
我的理解是这个和100%原理是一致的,芯片内部控制MOS持续导通,即chargepump维持高电压输出驱动MOS持续导通。而非100%duty控制时,在duty off时会有信号拉掉驱动输出。