MP2625B CHGOK waveform

It is suppose that the CHGOK is about 6Hz when temperature too high. But now we never saw 6Hz. The CHGOK is about 1Hz roughly. If no temperature fault, the CHGOK is low, normal.

Here’s schematic for reference. What cause the problem?

Hello Yihao,
Welcome to the forum. I would recommend to use the newer version of the part i.e. MP2625B and check again. Let us know if you have any further questions.

Yash Shah