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Electrolytic caps typically have low lifespans compared to other types of caps, especially over larger temp ranges.. even with proper construction. When I use to do design for circuits that needed a long lifetime I would really question any use of electrolytic caps.
Electrolytic caps typically have low lifespans compared to other types of caps, especially over larger temp ranges.. even with proper construction. When I use to do design for circuits that needed a long lifetime I would really question any use of electrolytic caps.
what would you use? tantalums? ive have the joy of recovering old equipment with dried tant caps on the power rails. (23 of 'em!) maybe tants are made better these days...
I'll say this for Dell though - they fixed every last one of those systems within 4 hours of our call.
I have to wonder whether Large Manufacturing organizations are aware that there is a good chance that going with subpar capacitor manufactures will cost them, but do so anyways because of the amount of money they save.
Earlier quoted context omitted.
That is a different sort of ripple. Your big electrolytic capacitors are used in the AC/DC conversion where the rectified sine wave is smoothed into a constant voltage. | | | _ _ _ ===>> | | / \ / \ / \ / |-------------- +V---V---V---V- +--------------- The capacitors store energy during the peaks and return it during the troughs. The ripple is the current in and out of the capacitor which heats them and does "stuff-…
It looks like lifetime is specified in hours of life at a high temperature - e.g.: http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_BXF.pd... Lifetime is specified at 10000hrs at 105deg C. As temperature decreases, lifetime appx doubles per 10deg C: http://www.low-esr.com/endurance.asp It looks like a cap rated at 4000h @ 105deg C should last around 60 years at 100deg F or so. Anecdotally I have a guitar amp mad…
Electrolytic caps typically have low lifespans compared to other types of caps, especially over larger temp ranges.. even with proper construction. When I use to do design for circuits that needed a long lifetime I would really question any use of electrolytic caps.
what would you use? tantalums? ive have the joy of recovering old equipment with dried tant caps on the power rails. (23 of 'em!) maybe tants are made better these days...
Earlier quoted context omitted.
what would you use? tantalums? ive have the joy of recovering old equipment with dried tant caps on the power rails. (23 of 'em!) maybe tants are made better these days...
In some cases you can use ceramic capacitors instead of electrolytic ones. I've done this exactly because I don't trust electrolytic capacitors to be anything more than big and cheap.
sooo...where are you buying these mystical 2200uF ceramic caps? :)
For about 6-9 months in 2006 We had a series of Dell Optiplex GX 270s that had a remarkable failure rate - close to 60% of our systems failed. We knew that Dell must have been having a tough time, when the FIRST question they asked on a support call was whether we saw any "Bulging Capacitors on the Motherboard" - I mean, not "Have you Tried Rebooting", or, "Have you tried powering down for 90 seconds", but "Do you ha…
Telekinesis? Teleportation?
Is there something I'm not understanding?
So, for hardware manufacturers, is there any reliable way to identify good quality caps?
For about 6-9 months in 2006 We had a series of Dell Optiplex GX 270s that had a remarkable failure rate - close to 60% of our systems failed. We knew that Dell must have been having a tough time, when the FIRST question they asked on a support call was whether we saw any "Bulging Capacitors on the Motherboard" - I mean, not "Have you Tried Rebooting", or, "Have you tried powering down for 90 seconds", but "Do you ha…
How did they fix a hardware failure in 4 hours? Telekinesis? Teleportation? Is there something I'm not understanding?