Hi Doug and the group,
If I told you of some of my experiences over the years with air traffic
control equipment design it would rival the exploding cap story or
worse.
Doug Smith
University of Oxford
Department for Continuing Education
Oxford, Oxfordshire, United Kingdom
--------------------------------------------------
Doug Smith
P.O. Box 60941
Boulder City, NV 89006-0941
TEL/FAX: 702-570-6108/570-6013
Mobile: 408-858-4528
Email: doug@xxxxxxxxxx
Web: http://www.dsmith.org
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On Thu, 04 Feb 2016 15:40:18 -0800, Doug Brooks
<dbrooks9@xxxxxxxxxxxxxxx> wrote:
I worked in a company once where we had caps burning up in airplane
cockpits. Gets the airlines attention real quick.------------------------------------------------------------------
The solution (which felt like a crutch to me) was to select
capacitors with low ESR. High ESR capacitors generated I^2*R heat and
melted explosively. Low ESR caps generated heat just low enough not
to explode.
Not particularly satisfying, but we all have been flying on planes
with that fix!!
Our caps were encapsulated in foam, so the heat couldn't dissipate.
Doug
Bni I wrote:
Hi expertspower on.
I am having issues with my 100uF 20V 1206 tantalum capacitor for 12V input.
The ripple is lower, but close to the limit (said in the DS) [~150mA]
I am facing 20% failure.Most of the time, it explodes on the first
Sadly I have a lot of PCB without any hope to change the PCB.
I haven't found much on the application of the tantalum.
I found that there is some condensation/crystallization time on the first
power up.
The article suggest to use 3xVin [Ohm] serial resistor.
I am not satisfied with this solution. I think it does not help on the
problem.
It only mitigates the problem and it will blow up in my customer hands.
Any experience or artical/book are welcome.
Thanks
Steve
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