Firstly I'll pay special thanks for the quick reply. You are right in thinking that it seems I am asking you to do all the work for me. I know the datasheet provides all the necessary information but being a professional your expert opinion may help me to get highest performance from the required transformer
below is the design considerations:
Output power (1)=350V.
Output power (2)=15V.
Output current (1&2)=3 Amperes
Input power = 10 to 13.2 VDC at more than 40A
frequency =20KHz
Please oblige me by providing turns ratio for all windings (primary & secondary) with the guage of wire.