I'm having a large ripple in output voltage when mosfet turns off. It's about 2V. I would like to know if it's normal.
The image below shows it. In blue is the gate voltage, and in yellow is the output voltage. The output is suposed to be around 27V@3A
Here is the schematic file: ACDC.pdf
Besides that I would like to know, if possible, how can i measure the noise related to the MOSFET switching.