Quote:
Originally Posted by MarkFromCA
It's nice to know that ripple current won't make much difference for most applications.
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To be more accurate:
Ripple current rating
does matter, but most modern electrolytic caps will meet or exceed the necessary ripple current rating for the majority of signaling and DC filtering applications for which a circuit designer would choose an electrolytic cap.
Designers will generally not use electrolytics for lower capacitance applications that require big ripple handling, they will use film caps.
However, film caps start getting really expensive when you crank up the capacitance, so you start having to use electrolytics for large values, and so it's only when you're dealing with spots that have big AC noise on them that you have to start gawking at ripple current figures on datasheets.