Ringing short after the switching
There is a strong ringing which occurs after low to high switchings and that spreads in the whole board. This ringing is obviously a problem because the ringing interferes in the current measure which must be clean to run the converter in current mode.
The ringing appears when current is flowing through the converter and the more current is flowing, the stronger it gets. It appears about 150-250ns after the switching and its origin is unknown, but it is certainly related to the switching, because when the duty cycle changes, the ringing moves accordingly.
This problem has been observed on the Owntech converter V1.1.2 N3 and N2 whether running in vlotage mode or current mode.