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BQ24610,充电灯亮,但电流为0

Other Parts Discussed in Thread: BQ24610

最近在调试BQ24610锂电池充电芯片,准备给6串锂电池充电,充满电压为25.2V,输入电源为28V。

接入28V电压,PG灯常亮,未接入电池时,各点电压为:VIN=28V;VTTC=1.24V;VTS=1.48V;VPH=27.24V;VREF=3.29V;VREGN=5.96V;VISET1=0.3V;VISET2=0.3V;VACSET=0.4V;VFB=2.26V;

电池电压24.3V,接入电池时,充电灯亮,各点电压为:VIN=28V;VTTC=1.0V;VTS=1.48V;VPH=24.3V;VREF=3.29V;VREGN=5.96V;VISET1=0.3V;VISET2=0.3V;VACSET=0.4V;VFB=2.018V;VIN总电流只有40mA

在电池接入,充电灯亮不到2分钟左右,充电灯就会自动熄灭,此时我触摸BQ24610芯片温度很高。之后只有PG灯常亮。

 PS:PCB图中的JE06已弃用,它的正极已与JE07的正极相连

PH点波形

PH点波形放大

LODRV波形

LODRV波形放大

HIDRV波形

调试多天没有解决问题,在此先谢谢各位给予回复帮助的朋友!