At 02:52 AM 9/5/2005 +0800, you wrote:
>Hi,
>         Sorry for my ignorance, but could you please elaborate on what
>you mean by inrush currents and how would one go about figuring them
>out?

What's the peak current that can flow through the capacitor (eg.
suppose it supplies *all* the peak motor current), or what is the
peak current that will charge the capacitor. Is it limited, and if so,
to what maximum current? Think about all possible conditions.

Generally, tantalums are most *un* suitable for power supply applications.
They are quite prone to failure, sometimes in spectacular fashion. A
low-Z aluminum is a much safer bet.

If you *must* use them, then heavily derate the voltage (use a capacitor
rated for 3 times as high as the working voltage), and follow all data
book recommendations to the letter.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
->> Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZspeff


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