TI专家好,
最近在用BQ25895做一款移动电源时,但发现一个奇怪现象。当VBUS不接适配器时(此时应该为0V),经过PMID对外部进行放电,但负载电流大于1.6A左右时,VBUS电压会缓慢地抬升(抬升值随负载变大而增大),大于2.3A左右时,会加速抬升到电池电压。请帮忙看下这正常吗,是什么原因?谢谢!
下附VBUS波形图。
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