Do a search for:
design flyback transformer
There are dozens of design aid tools out there.
http://www.te.com/japan/corp/press/pdf/Media_digest12_Flyback_Transformers_e.pdf
design flyback transformer
There are dozens of design aid tools out there.
http://www.te.com/japan/corp/press/pdf/Media_digest12_Flyback_Transformers_e.pdf