Can you check if you have supplied power to VDDA as well? Also can you probe the cmod pin and check it's voltage?
Thank you for answering！
vdda is 4.5v
cmod is 1.2v
When not working(AC12V5A )
vdda is 4.6v
cmod is 4.1v
Certainly I could confirm the difference.
I will check it for myself,
If there is a solution, please answer.
Can you please share the schematic of your interface so that we can try to find out the issue?