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关于SM74611智能二极管的疑问

Other Parts Discussed in Thread: SM74611

各位TI的大神,

我看到sm74611的工作原理有点茫然,这个智能二极管有别与其他,,没有GND引脚,利用二极管和MOS管交替导通,内部提供电荷泵供电的工作电压只是二极管导通时的0.6V,实在想不出什么电路能在0.6V的时候进行电荷泵,并给MOS提供驱动电压,请TI技术人员,或者相关懂的人为我解答一下,谢谢。