4 ms·
Surge current is potentially an even bigger issue. I use a lot of tantalums (more than many engineers), and my personal rule is basically that they are great fo
by exmadscientist 4y ago
Surge current is potentially an even bigger issue. I use a lot of tantalums (more than many engineers), and my personal rule is basically that they are great for anything that never leaves my board and very, very sketchy for anything that does. This works out pretty well!
- magicalhippo 4y agoAh I probably misremembered a bit. I did some digging and found this[1] paper which goes into some detail. It contains this interesting section: Experiments show that solid tantalum capacitors can tolerate discharge currents at much higher levels of voltage (typically, close to the scintillation breakdown) than the charge currents, so current spikes are much more “dangerous” in combination with the increasing voltage that happens during charging. This indicates that a fast voltage increase to sufficiently high level is critical for surge current failures, and high current spikes are byproducts of the fast voltage increase rather than the prime cause of failure. [1]: https://nepp.nasa.gov/files/24745/2013_n240_Teverovsky_ESTEC_Derating_paper.pdf https://nepp.nasa.gov/files/24745/2013_n240_Teverovsky_ESTEC...