发现76930的OVRD_ALERT一直拉高,MOS管一直无法打开,求解?
I2C与78350之间有上拉,CAP1和VC5x与CAP2之间电压3.3V正常
另外78350上面看到的MOS管已打开,但是实测结果是MOS没有开。。。
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发现76930的OVRD_ALERT一直拉高,MOS管一直无法打开,求解?
I2C与78350之间有上拉,CAP1和VC5x与CAP2之间电压3.3V正常
另外78350上面看到的MOS管已打开,但是实测结果是MOS没有开。。。
导致目前从bqStadio上面看到MOS打开了,其实MOS还是始终没有打开,从bqMAXIMO上也可以看到MOS没有开
你这个问题是在ALERT管教外加了高电平导致充放电管关断的。
OVRD_ALERT (Bit 4): External pull-up on the ALERT pin indicator. Only active when ALERT pin is not
already being driven high by the AFE itself.
0 = No external override detected
1 = External override detected. Remains latched high until cleared by the host.
我的外面没有被拉高,该脚是直接跟78530的ALERT相连,附件有原理图可以看到。我怀疑是Bq7693003内部锁存啦,但是就是清除不了,求解