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BQ25970 EVM 在VAC上供电7.5V,但是发现OVPGATE上没有电。

Other Parts Discussed in Thread: BQ25970

BQ25970 EVM 在VAC上供电7.5V,但是发现OVPGATE上没有电,即使是把JP1完全断开,情况也是一样。

1)JP1连接的情况下,OVPGATE到地的电阻为25ohm;

2)JP1断开的情况下,OVPGATE到地的电阻为高阻,有抓取到如下波形。(黄线为VAC,红线为OVPGATE)