Re: flybacks & transformer leakage

Pooh Bear wrote:

> 
2% is just sweet. My current design has 3% IIRC ( non interleaved though ).



At that power level almost certainly.


Thanks for the reassurance. When I was doing calculations for the RDC snubber in order to clamp peak MOSFET Vds to 700V I get 1.2W dissipation in the resistor ! Is this typical for 25W offline supply ?

How about the "two switch" discontinuous flyback ?
 http://www.edn.com/contents/images/47173.pdf

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