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BQ24610充电发热严重原因

Other Parts Discussed in Thread: BQ24610

使用BQ24610给锂电池充电 设计充电电压25.2V,电流1.5A,现在基本功能已实现,但是充电时BQ24610芯片发热很严重,电路和推荐电路是一致的,确认不是thermal pad的焊接问题,Nmos型号和demo板一样为fds8447,,请教一下还有别的可能的原因吗