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BQ21040没输出

Other Parts Discussed in Thread: BQ21040, CC2541

打样了10块板子,有一个板子焊接完就不能用,一个用了几天不能用了,都是通电后BQ21040的2脚没有电压,换新的就好了

USB供电,对电池充电,同时电池经过TPS73230稳压后给CC2541蓝牙芯片供电

为什么损坏的概率会这么高呢