Quick question about winding your own toroids for SMPS

[MikeHunt79]

How do I know how much my toroid will be able to handle?

Basically, primary to secondary ratio = 1:2, centre tapped. 33khz switching frequency.

I'm not sure how big the core or enameled wire needs to be... is there a rough guide somewhere? I want around 250W really.

 

[poobah]

This will take you to an index of pdf's.

http://www.mag-inc.com/ferrites/fc601.asp

Transformer design, design, design, design, requires some amount of repetition. It begs for a spreadsheet.

Watch your units carefully... there at least 8 million different magnetic units... even the metric ones are screwed up.

Someday... there will one magnetic unit: the "Poo". Until then, have at it.