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BQ27Z746: 充电mos管关闭时,bq27z746烧坏

Part Number: BQ27Z746

如图,充电mos管关闭时,充电电源有一个波动电压,高于B+*2(B+最高电压为3.6V,铁锂电池)电压,通过此路径进入bq27z746,烧坏IC;R9和R10修改为1K后,此现象消失;能否帮忙评估一下,修改此电阻是否会有其他影响?我们也测试了部分样品,暂时没有发现异常。