Re: Tantalum cap failures

Well, if parasitics in the caps led to high dI/dt causing excessive
voltage, I could see the problem, but that's not the case here - I've
done extensive measurement using a 100MHz DSO during the high current
events and there are no troublesome voltage spikes on the caps and
voltage remains comfortably within rated operation throughout.

(We have an array of 14x470nF sm ceramics in parallel with the tants to
help deal with the HF content and this seems to work well in that
respect).

If there's another problem mechanism in tantalums relating to high
dI/dt, I'm very interested to hear about it.

Ted

.

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