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Groups > sci.electronics.design > #431300
| From | krw <krw@nowhere.com> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: bipolar aluminum caps |
| Organization | None |
| Message-ID | <n3h40cdfr7bo7lnfs16gd9oadn45ppcf70@4ax.com> (permalink) |
| References | <3i4vvb5pl7ac7o3h0uqhpotjp1bk257li0@4ax.com> <6fbcf79f-bf44-4c96-b7e0-5814e4c0dc20@googlegroups.com> <gravvbt5m6gi1ol9g8hl4vr74ui5b9b5hd@4ax.com> <38lMz.55783$SB2.10753@fx17.iad> |
| Date | 2016-10-15 11:06 -0400 |
On Sat, 15 Oct 2016 00:45:01 -0800, Robert Baer <robertbaer@localnet.com> wrote: >John Larkin wrote: >> On Thu, 13 Oct 2016 07:34:23 -0700 (PDT), tabbypurr@gmail.com wrote: >> >>> On Thursday, 13 October 2016 15:02:02 UTC+1, John Larkin wrote: >>>> High-K ceramic caps are awful. They lose 90% of their capacitance at >>>> rated voltage. >>>> >>>> Are bipolar aluminum caps reliable? >>>> >>>> I would think that polymer aluminum caps would make good nonpolarized >>>> things, but there don't seem to be any. >>> >>> Tants make good bipolars ;) >>> >>> >>> NT >> >> For a while. There's engineering lore that dry tants are OK at -10% of >> rated voltage, or something. >> >> > Yes; that is the "standard trick" of order-of-magnitude derating. > But even so, still having the possibility of fireworks. When I was in IBM, we used tantalums by the millions (perhaps a thousand per system). The only problems we ran into were reverse insertion but that could be spectacular and occur years later. Our design ground rules called for a voltage de-rating of 2-3 times (no more), not much different that ceramics (though for different reasons;-). We didn't use aluminums. These were 100K hour applications.
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bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-13 07:01 -0700
Re: bipolar aluminum caps George Herold <gherold@teachspin.com> - 2016-10-13 07:11 -0700
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-15 00:38 -0800
Re: bipolar aluminum caps tabbypurr@gmail.com - 2016-10-13 07:34 -0700
Re: bipolar aluminum caps Reinhardt Behm <rbehm@hushmail.com> - 2016-10-13 22:58 +0800
Re: bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-13 08:44 -0700
Re: bipolar aluminum caps tabbypurr@gmail.com - 2016-10-13 08:59 -0700
Re: bipolar aluminum caps George Herold <gherold@teachspin.com> - 2016-10-13 09:14 -0700
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 03:40 -0500
Re: bipolar aluminum caps Syd Rumpo <usenet@nononono.co.uk> - 2016-10-14 09:52 +0100
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 03:59 -0500
Re: bipolar aluminum caps Syd Rumpo <usenet@nononono.co.uk> - 2016-10-14 11:01 +0100
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 21:48 -0500
Re: bipolar aluminum caps tabbypurr@gmail.com - 2016-10-14 02:18 -0700
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-15 00:45 -0800
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-15 11:06 -0400
Re: bipolar aluminum caps tabbypurr@gmail.com - 2016-10-15 08:23 -0700
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-15 19:39 -0400
Re: bipolar aluminum caps Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2016-10-18 21:23 -0400
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-15 00:42 -0800
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-15 11:07 -0400
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-17 09:28 -0800
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-17 19:52 -0400
Re: bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-17 17:29 -0700
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-19 13:06 -0800
Re: bipolar aluminum caps Joerg <news@analogconsultants.com> - 2016-10-13 09:14 -0700
Re: bipolar aluminum caps Frank Miles <fpm@u.washington.edu> - 2016-10-13 17:15 +0000
Re: bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-13 11:42 -0700
Re: bipolar aluminum caps Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2016-10-13 14:52 -0400
Re: bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-13 11:56 -0700
Re: bipolar aluminum caps "David Eather" <eather@tpg.com.au> - 2016-10-15 14:53 +1000
Re: bipolar aluminum caps "David Eather" <eather@tpg.com.au> - 2016-10-15 14:52 +1000
Re: bipolar aluminum caps Tim Wescott <tim@seemywebsite.really> - 2016-10-13 19:41 -0500
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 03:43 -0500
Re: bipolar aluminum caps Tim Wescott <seemywebsite@myfooter.really> - 2016-10-14 12:19 -0500
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 22:18 -0500
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-13 20:57 -0400
Re: bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-13 18:05 -0700
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-13 21:39 -0400
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 03:44 -0500
Re: bipolar aluminum caps whit3rd <whit3rd@gmail.com> - 2016-10-14 12:22 -0700
Re: bipolar aluminum caps whit3rd <whit3rd@gmail.com> - 2016-10-13 18:01 -0700
Re: bipolar aluminum caps alpibucky <alpibucky@mail.be> - 2016-10-14 22:23 +0200
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-15 00:35 -0800
Re: bipolar aluminum caps Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2016-10-18 21:22 -0400
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