datasheet上说Ichg pin用来设定充电电流的参考值,充电电流指的是流入电池的电流么,此外,充电电流的反馈是从哪儿得到的?是通过RBAT_SNS得到的电流反馈到BQ芯片内部的?RBAT_SNS的阻值为啥要是5mΩ,要是有偏差对电流影响大不大?
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是通过RBAT_SNS两端的电压降进行电流反馈,但数据表上没有具体的计算方法或内部结构。
相关内容请参考数据表的9.2.1.2.7 Sense Resistor (RAC_SNS and RBAT_SNS) and Current Programming章节: