Power Supply Bypass Caps


A number amps have film bypass caps on the big electrolytic caps in the power supply. Is there a certain value bypass cap that works well in all cases, or should it be sized based on the value of the main power supply caps?

Any recommendation on brands of caps that work well in this application would also be welcome.
kana813

Showing 1 response by rannagarden

I usually just use a Wima or Rifa filmcap valued 0.1uF - 0.47uF

These values usually just do the trick with out all the spec. searching. Takes out some ugly ripple. And as Sadownic says; caps in parallel and smaller value is also to recommend, but not a have-to-do. Film cap does just fine to smoothen.

But then again - if you wanna do it like a pro - read Sadownics answer and get your calculator.

Best,
Mike