>
>In particular I am worried about what will happen if the current sunk by the
>load attached is rapidly changing.. Would the whole thing start to
>oscillate? (More current sunk, so the dutycycle is increased. Not-so-much
>current sunk, it is decreased. What if this happens faster than the PIC can
>complete a D/A and adjust PWM?)

You need separate magnetics and control loops for each regulated output,
otherwise you can only regulate one output.
Me, I'd use a CS384X series chip to do the regulation.
Have the pic measure things, and feed it the appropriate ref voltage if you
must.


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