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bq77905无输出



你好!

使用bq7790512做了一块5串的锂电池保护板,此时每个电池电压为3.5V

接上电池组后没接过负载,测量输出无电池电压 也无法充放电,DSG与CHG引脚一直都处于低电平状态,AVDD 2.595V,TS 0V,VTB 0.59V,LD 0V。检查了PCBA没发现有任何焊接问题。所有到电池的连接线重断开再接了一遍还是无作用。电路图如下