Hello, I would like to design a flyback topology using UCC28740 and the efficiency of the topology should be as high as possible.
Some parameters are as follows:
Vin =350V~390V DC,
Vout= 48V
Iout=A
Here are the transformer calculations:
1. Will Ippmax changes when the switching frenquecy changes? If yes, then how will Ippmax change?
2. When the switching frequency goes down to 30kHz, is Npri= 56 enough for the topology?
2. Do you think it's OK to design the topology and could you pls give some comments and guidance or help to correct it?
Thanks!