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BQ2057WSN在不充电时发热,电池电量损耗过快

Other Parts Discussed in Thread: BQ2057W

电路设计用BQ2057WSN通过CMOS管给8.4V/4700mAh电池充电,设计电流800mA,输入9v,按照说明文档的电路搭建了电路,可正常充电,当外部9v电压断开时,BQ2057芯片发热,有的发烫,此时BQ2057的1,2,3,7,8电压比电池低0.3v左右,估计是mos管导通引起,24小时电池电压损耗完。请专家给看看电路是否有问题。