HI,
CAN ANYONE GUIDE ME THE DETAILED PROCEDURE INVOLVED IN DESIGN OF PLANAR TRANSFORMER FOR FLYBACK CONVERTER. (Pout power 9W)
planar transformers are not that different from normal ones technique wise... back in the day the go to company was philips.... then ferroxcube bought the division and rebranded all the stuff
how to design them including safety issues, though it references outdated standards:
www.ferroxcube.com/.../plandesi.pdf
and the magnetics designer that even transformer shop engineers are impressed by:
that said you did not say if you needed safety isolation. planars lend themselves to higher powers than 10W and you can not get safety isolation in one under a 60W capable core due to spacing and isolation ratings. For DC/DC converters i recommend clip cores with separate high turns side in a separate multilair PBC... for the real small stuff you run into winding depth not holding the PCBs instead of winding width holding turns
in a 10W DC/DC you end up putting everything in a custom thickness PCB with edge solder contacts and a hole in the main PCB for the core ... all this and more is covered in that PDF
Dan
