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我的电路参考该芯片的datasheet里面的如下
问题是，现在4.2V的电压经常被拉低到3.9V-3.7V，然后，输出的电压为3.3-3.2V，经常就烧了芯片，问题出在哪里呢，
输出的电压3.3V是我所需要的电压。
亲；这时4.2V供电还是电池供电？是过流保护导致输入电压拉低还是其它？
4.2V供电，是从TP4057里面出来的4.2V，
