A few months ago I posted some questions about switching regulator design, and got quite a lot of useful info. One of the things briefly discussed was using a low-ESR ceramic on the input to the switcher to handle switching frequency ripple, and then big bulk electrolytics to handle 120Hz ripple from the rectifier, but with an inductor or choke between the ceramic and electrolytics to protect the bulk capacitors from the switching frequency ripple (which might age them prematurely).
DJ -- I notice from looking at your alarm clock boards that you seem to have tried something like this. Would you care to share your approach and results? I'd greatly appreciate it. Looks like you have a diode in there too -- for preventing resonance? Thanks, -- Randall _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
