TI的工程师们:
设计的4串保护板,采用76920+78350方式。从78350通信看到高两串电压始终在跳变,而且变化范围很大,甚至出现过压和欠压同时存在现象。图片是电压采样局部变化图和原理图。电池电压均在3.85V左右。电压采样处的电容也更换过,76920芯片也更换过均是故障依旧。此为量产前的样板,比较急!请帮忙分析!
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