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BQ2057W发热的怪异问题

Other Parts Discussed in Thread: BQ2057W

如下图所示,我用BQ2057W给两节串连的锂电池充电,发现充电过程中BQ2057W发烫。

输入电压为9.6V,充电电流设置为0.6A。

1、怪异之处在于MOS管基本不发热,而BQ2057W却很烫手,MOS用的是IRF9310。

2、我把电池拿掉,输入9.6V,发现没有电池充电时,BQ2057W已在微微发热了。