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BQ24640 PG引脚LED闪烁

Other Parts Discussed in Thread: BQ24640

你好,我目前在使用BQ24640,使用推荐原理图,电路目前工作正常,按照预期:充电电压设置到11.4V左右。充电电流350mA左右,外挂12V/30F超容,充电时间15分钟。当超容电压达到11.4V时,万用表显示充电电流为零,但此时PG引脚指示灯会闪烁。请问此时PG引脚LED闪烁是什么原因,谢谢!