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这是我所绘制的电路图（没有用到IIC通信），连接18650锂电池调试后发现SYS引脚的电压会随着电池电压跌落到3.5V以下，此时没有连接充电器充电。是我电路图设计的有问题吗？电路的其他功能都正常，充电在1.7A左右，过冲和过放保护也没什么问题。我读数据手册上说SYS引脚的电压不会低于3.5V，是我理解错了吗？我还用过BQ25611D，BQ25890等都存在SYS电压跌落的问题，烦请尽快回复
您好，没有连接充电器，The SYS voltage follows battery voltage - BATFET voltage drop that is the SYS current times Rdson. BATFET Rdson is 19.5m Ohm.
