Hi,
I'm working in referencing the design UCC28700EVM-068 and I have had some issues with. I took as reference for my design the attached files on TI home page, http://www.ti.com/tool/UCC28700EVM-068?keyMatch=UCC28700EVM-068&tisearch=Search-EN#Technical Documents. I made a board following user's guide for UCC28700EVM-068 and followed the specifications in the file (design & materials) and my AC/DC converter doesn't work. I tried to test UCC28700 separately to watch PWM output signal to drive the mosfet, according with the UCC28700 technical document, and I didn't get anything. What can it be my problem? or any suggestion to make working my board or modify it.