[SI-LIST] Re: Capacitors
- From: Doug Brooks <doug@xxxxxxxxxx>
- To: jackmosleyus@xxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Wed, 07 Nov 2007 09:44:33 -0800
Before the short, there is a charge on the capacitor (defined by the
voltage across the cap and the size of the cap.)
If the cap is shorted, this charge "dumps" through the cap. How high
that current "dump" is depends on the amount of charge, the time it
takes for the cap to short (probably not instantaneous), and the
internal resistance of the cap. That current "dump" is likely to be
more than the steady state limiting current defined by the voltage
and the resistor. So, yes, there will likely be a very short,
high-current spike that exceeds the resistor current at the moment of
the short.
At 07:07 PM 11/6/2007, Jack Mosley wrote:
>Hello,
>To evaluate capacitor reliability in THB condition, a circuit using
>power supply and limiting current resistor connected to the
>capacitor is used. If a short occurs between the capacitor pin, is
>the current will exceed the resistor limited current for a short
>period of time ?
>
>
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