I purchased UCC25600EVM board and I need to study the transformer and resonant inductor, and work out the losses and AC resistance, would it be possible to get details of the transformer and resonant inductor build up ( T2 and L1 ).
Hello Ala,
Thank you for your interest in the UCC25600 LLC controller and its EVM board.
Some information on the transformer can be found here: 
However, I am unable to find any information on the L1 inductor. This is not a part that TI designed. Perhaps you can enquire to the supplier Vitec, part number 75P8106, for information.
Regards,
Ulrich
