LM5025: Is there any reference to design transformer on PCB about LM5025's solution?

Hi Lian Wu,

There is introduction for transformer Design (Forward Converter and Flyback Converter) in this paper. https://www.ti.com/seclit/ml/slup112/slup112.pdf 

You can also refer to TI LM5025 reference design located here.

Active clamp forward converter with an input of 30-60V to 15V@1.5A isolated.  

http://www.ti.com/lit/ug/snvu096/snvu096.pdf     This paper provides layouts.

an input voltage range of 8V-to-14V and a regulates the output to 48Vout @ 0.8A active clamp forward converter,

http://www.ti.com/tool/PMP7840      

Regards,

Teng