Some background info:
I'm working on building a full bridge SMPS power supply. It will take
the 13.8v nominal automotive source and boost it to about 50 volts. This
is done through a high frequency transformer.
The primary is driven by a MOSFET H bridge [hence "full bridge"]
To keep the flux matched for both current directions, each directional
pulse from the H bridge must have the same on-time duration. To clarify,
if you had a 50% PWM signal coming out from a controller, you could take
the inverse and have the two signals you would need to drive the H
bridge, however; if you had a 40% PWM signal and you inverted it, the
on-times would be 40% and 60% [POP goes the MOSFET - unbalanced flux in
the transformer core].
So if anyone has any ideas on how to do this, I'd be glad to hear them.
I prefer using PICs or logic gates where possible because they are
easier to breadboard and cheap, but I will take any advice.
Thanks everyone.

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Martin Klingensmith
http://infoarchive.net/
http://nnytech.net/

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