Edward Bartolo:
...
> For voltage rectification Power Factor Correction (PFC) is not an
> issue.
...

For ac input, diodes gives you awful ac input currents, see e.g
fig. 2 in:

http://www.vishay.com/docs/88868/anpfc.pdf

which is (somewhat) corrected by PFC. It has nothing to do with a
switch mode power supply per se, the problem is in the rectifier.

Any further questions will answered off-list.

Regards,
/Karl Hammar

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