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#### mook Johnson

- Jan 1, 1970

- 0

same amount or heat in a resistive load as a DC current. This as always

been with sinusoidal currents.

In this case I have narrow 50uS pulses of current at 5 amps with repetition

rates of 500uS.

If I calculate the RMS current vs. the average current there is a sizable

difference. the average current is 0.5A the RMS current(from spice

simulation) is 1.6A.

Which if the two should be used when determining the heat generated by a

power resistor.

Assume the resistor chosen can handle the instantaneous power during the

current spikes.

I'm more concerned about the heatload this will add to the heatsink.

There is a 10X difference in power between the two.

thanks