TI中文支持网Part Number:BQ25890
Hi ti team，
我客户使用BQ25890 OTG时，在插入OTG设备瞬间会出现高达2.9A峰值电流，这个电流瞬间会把3.6V电池拉到2.6V，造成系统重启.请问有没有办法或者设置哪个寄存器限制这个瞬间峰值电流（有设置寄存器OTG 500mA限流无用）.thanks！
Star Xu：
您好，是否方便将电路发过来看一下？
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switch：
Hi Star,
原理图如下
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Star Xu：
您好，正在查看电路，稍后回复。
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Star Xu：
您好，
If the boost mode current limit set in REG0A response time is too slow to prevent the battery voltage from dropping then there is not much which can be done from the perspective of the charger IC.
Also section 9.2.14.2.1 on page 31 of the datasheet outlines the BQ25890s response to a overcurrent event. It is expected for the charger to briefly cutoff the path to the OTG device.
The BQ25890 is only rated for OTG current up to 2.4A. You will need to determine a way to soft start or limit the current draw from the OTG device.
