> The design is here:
>
http://picasaweb.google.com/schouse/Electronics/photo#5094485161260312626

Hi Mohit,

I doubt very much this circuit will work at 80KHz.
You'll need much stronger turnoff than a 10K resistor
on the gates of the MOSFETs.

Also I question your use of the entire N-channel part
of the circuit - throw it out and use a single
schottky rectifier there.

Next is your output filter - there's way too much
capacitance. You may not need very quick reaction
time, but it's a waste either way. Try 22 uH and 2.2
uF. Then you can use a ceramic capacitor. Your ripple
will be low enough. Use a bobbin ferrite inductor -
shielded preferably.

Use a P-channel MOSFET with lower resistance. You
don't need the 100 volt rating of the IRF9540n.

Cheerful regards,

Bob

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