Fly back converter transformer selection

[elec-engin]

Hi friends
I designed a universal Ac voltage converter and EE core was chosen for the transformer core. for example, I calculate the air gap about 25mil. how can i find the best part number of suitable EE core for my designation with that air gap. i will appreciate your assistance.
best regard

 

[cupoftea]

The catalog for TDK (epcos) and ferroxcube cores is in the "FERRITE CATALOGS" folder of the following...

SMPS course_Big folders
https://drive.google.com/file/d/17ij_pQLkAzzYeL_TRNci86sXHMirKHmD/view?usp=sharing

...quickest way is to choose one, work it through, and then go to next up or down size till you get nice Bmax and core loss etc....once youve a template going, you can quickly do this.

Best is to get a template going with all the parameters of each core, then just re-use that each time.

Or you can do on power integrations....then see what they use...then use that and see how it works for you.