PI expert suggested an N27 core for flyback design
Posted by: treez
on
Hello,
I just did a 90-265vac flyback (TOP266EG) in PI expert. Vout = 40v, 1A.
It suggested a EF25/13/7 core by TDK/Epcos of N27 material. It suggested 132KHz switching frequency.
This core also comes with N87 material. The N87 material has far less core loss at this frequency. Why did PI expert suggest N27 material instead of N87 material?
Hi.
This simply has to do with the default library PIExpert is using to calculate the transformer. On the standalone software you can create your own library of core materials (check here for a video tutorial on adding your own cores)