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用BQ24703设计的给3S锂电充电电路,充电电流会自动增加至3-4A,请问是什么原因?

Other Parts Discussed in Thread: BQ24703

请问各位TI大神,我用BQ24703设计的给3S锂电充电电路,参考数据手册上设计的。设计电流2A,刚开始充电时,电流是2A,但是当充电电感温度到达50多度时,充电电流会自动增加至3-4A。这是什么问题啊,BQ24703自身也会发热,请大神不吝赐教,谢谢!