30A switch mode regulator

[Johan Wagener]

Where can I find a schematic of a good PWM regulator that I can use with my
12V 300VA transformer?

 

[John Popelish]

Johan Wagener wrote:

Where can I find a schematic of a good PWM regulator that I can use with my
12V 300VA transformer?

A design that uses two or more phases cuts way down on the ripple
current on both input and output filters and allows smaller switches
to be used. You might get some ideas from these datasheets.
http://cache.national.com/ds/LM/LM2642.pdf
http://cache.national.com/ds/LM/LM5642.pdf

--
John Popelish