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BQ24610接上电池无法充电问题?

Other Parts Discussed in Thread: BQ24610

您好,我用BQ24610设计的4串1并锂电池充电电路,输入电压为19.5V,充电电压设置为16.8V,当不接电池的时候VFB为2.1V,而接上电池的时候VFB变成了1.88V,此时电池电压为15.28V左右。SATA1和SATA2灯始终不亮;VREF为3.3V,RENG为5.98V,TS位3.22V,HIDRV为15.28V,LODRV为0V。

不接电池的时候VFB为2.1V,可能是哪有问题,TTC是0.082UF电容到地,看看PCB布局和布线有没有什么问题。