我们用到BQ39700DSER,用作电池低压保护(高压保护不用),但我们接上电池(下图B+,B- )后发现MOSFET 不能打开,但把图中MOSFET U502 的 Pin 2 和 Pin 3 用金属接触一下,就可以导通开机。想问下什么原因会导致这种情况?这电路上有没有什么问题?
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