M. Adam Davis wrote:
> I, for one, still look at 'switching' power supply design as a black
> art, such that I'm not comfortable trusting something I design even
> though it works and I mostly understand it.
>
> So if you have or can design a solution almost effortlessly then it
> sounds like you'd have an eager audience here.
>
> I know I would love a very cheap, poorly regulated, isolated 5v-5v ps.

If the input voltage is known well, then it becomes particularly easy.  All
you need is a free running oscillator that can turn a pass element on and
off, or two of them out of phase.  You don't even need feedback since the
output will be the input (minus some losses) times the transformer ratio.

> Especially if the same general design can scale from 5mA to 500mA
> with minor changes or component choices.

Perhaps the topology can be similar, but some things are going to change
when you change the current by 100 times.


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