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From: "Ian Buckner"
Subject: Re: Philips MKT cap failures - LV pulse application
Date: Thu, 26 Sep 2002 09:19:09 +0100
Organization: Agilent Technologies
References: <1546192.BeKxSd1CPM@mixdown.org> <email@example.com> <3D92AF0F.179A617@erckert-ibe.de>
NNTP-Posting-Date: Thu, 26 Sep 2002 08:19:11 +0000 (UTC)
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"ricardo" wrote in message
> There are different flavours of tantalum caps on the market.
> The original tantalum caps have very low Equivalen Serier Resistance
> (ESR). These are the ones that explode due to high inrush current.
> The second flavour has an intentionally increased ESR. These are
> rugged but their blocking capability of course is poorer due to the
> higher ESR.
> Manufacturer data sheets may help to find the right flavour.
> Alternative solution: Try ceramic caps. They meanwhile are available
> to some 10uF.
> Phil Allison schrieb:
> > "Bob" wrote in message
> > news:P1ck9.firstname.lastname@example.org...
> > >
> > > We're currently experiencing problems with tantalums exploding
due to too
> > > high inrush current when the power supply is first applied to
> > ** This is a very old problem with tants - one of their many
> > "tantrums". IME it only happens if you hot plug something into a
> > source. You could always use aluminium electros - they may be a
> > though.
> > >
> > > You see, capacitors are like women -- you can't live without
them and you
> > > can't live with them.
> > ** Ah, but you do have to pick the right one and make sure
it is happy
> > where you have put it.
> > Regards, Phil
Using high ESR tantalums or aluminium electrolytics kind of defeats
of using tantalum in the first place. Do a search on "surge robust"
terms for tantalums, you will find there are parts that have _much_
current capability than the usual suspects (and lower ESR).
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