[TCML] how to work out average current ?

["Chris Swinson" <list@xxxxxxxxxxxxxxxxxxxxxxxxx>]

Hi all,

If a curent spike peaks to 1A over 500uS then what is the average curent 
over that cycle ?  further complicates things as actual spike only lasts 
about 10uS then falls in current to zero over the rest of the 500uS period..

I am working on a DC res-charge circuit so it draws sharp current pulses. My 
NST will be current limited to maybe 100mA (depending on what NST I use) so 
just wondering if the 100mA limit will be enough to charge the smoothing 
caps up.

I think it works out at 150mA, at least that seems to be the RMS figure. 
150mA may take longer to charge the capacitor though I do not see this as a 
problem.

I was trying to think how to add a current limiter into my simulation 
without using a resistor but can't think of a way of doing it. 5,000uS seems 
to be the charge time on 80mA limit via a resistor though it takes a full 
second of time to charge the smoothing caps up..

Does these figures sound about right ?

cheers,
Chris

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