Great answer Volenti! Thanks! Now you see why I prefaced my remark with: I don't design PSU's. My power supply education is based upon a hobby book on PSU design (using those heavy 60Hz single or dual-tap transformers). Those simple designs didn't prefilter the AC or convert the AC into a higher frequency.
The one thing I'm vague on is the "chopped up" phase of the PSU circuit you describe. Perhaps you can expand on that Volenti?
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