USB-PD sink not working with some Ac adapters

[AWack]

Hi,

I´m using USB-PD (with STM32G0B1CEU6) succesfully with a lot of own boards and different AC adapters. But with one adapter I don´t get the 20V despite the source has this capability.

Using a PD analyzer I can see, that with the not working adapter the sink doesn´t send an ACK. What could be the reason?

 

[FBL]

Hi @AWack 

Would you share your .cpd traces?