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BQ24133充不进电

Other Parts Discussed in Thread: BQ24133

请教一下各位,最近在用BQ24133这款芯片,输入外部电压是12V,想给12.6V的锂电池充电(3节18650电池串联),按照手册CELL引脚接到VREF上。发现在接上电池之后,没有充电电流。当电池不接时,LED灯常亮。尝试调节输入电压到5V时,LED闪烁,7V时LED常亮。焊接没问题

SW 为10.55V,

VREF为3.3V

ACDRV为18.328V

然后接上电池时,没有变化,电流只有75mA。电池电压我量过是10.77V。以下是电路图。