Okay. I've seen the schematic. So what's the value of R22 - the upper divider resistor at the 3.3V output?
Okay. I've seen the schematic. So what's the value of R22 - the upper divider resistor at the 3.3V output?
Zip file? I'm afraid that a lot of people are very cautious with dealing with zip files. Can you post it in a picture format?
HERE IS A CALC DOC for a 2 tran forward preceeded by a pfc...
you dont need that much in the way of calculations.
One page shows basic 2tf calcs...then theres a few calcs of doing it with various cores, and checking out the Bpk etc
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also attached is the checking ltspice sim of it
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also attached another 2tf sim in ltspice.
I am sure you know that a 2tf is just a full bridge with the diagonally opposite fets just done as diodes.
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Also, a full bridge smps, is just two interleave switched 2tf's.
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all the maths you need for a 2tf trxformer is in the attached doc (Theres more than that in there too)
HERE IS A CALC DOC for a 2 tran forward preceeded by a pfc...
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