keep the rush in current in mind. It will heat up the part as well as the
ripple current.
And does the ripple current in the datasheet valid for the frequency of your
ripple?
BR
Gert
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-----Ursprüngliche Nachricht-----
Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im ;
Auftrag von Bni I
Gesendet: Donnerstag, 4. Februar 2016 16:50
An: si-list@xxxxxxxxxxxxx
Betreff: [SI-LIST] Tantalum explode
Hi experts
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 power on.
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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