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BQ24640充电电压

Other Parts Discussed in Thread: BQ24640

我设计了一款基于BQ24640的超级电容充电器,充电电压、电流可调的充电器,原理图和官方提供的基本一致,通过直流稳压电源供电。

当输入电压为5v时,输出电压可以正常设置。当输入电压大于5v时,输出电压保持在1.7v左右,且不可调。

请问有什么原因会导致这样的情况发生?