Manfred
Thanks for that detailed explanation: I like the way you use a sound card
to help with getting the stability right.
>> without switching regulation a smaller output capacitance (smaller size
>> and
>> weight) is needed as the guard band is very small compared to the
>> triangular
>> dip when using an inductor
>
> Sorry, I didn't get this...
Say you have a simple, non-stabilised switcher; then, in a push pull or
bridge design, a small guard band is needed between each side
energising/de-energising transition to allow for storage effects, to prevent
cross-conduction. This guard band is "filled in" with the output
capacitance. This value of capacitance would be a lot smaller than needed
in a stabilised design. Of course it does nothing for input ripple.
David
G3UNA
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