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问题一：
I2C通讯时，SCL会被BQ27441拉死。导致时钟拉不高。I2C无法通讯
您换个芯片确认一下是不是芯片坏了。
这个ic可以申请样片的，楼主可以在官网或者当地代理商处申请样片试试
官网：http://www.ti.com.cn/product/cn/BQ27441-G1/samplebuy
