bq25895的SW引脚输出电压是不是就是电池电压?例如当前电池电压为4V,则SW端也是输出4V
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Hi
不是。
SW是高低边MOS连接的开关节点,需要外界一个电感。
在降压时, 两个MOS与电感构成降压电路,输出是SYS,再通过充电MOS给电池充电。