Author Topic: Modding E3620A  (Read 1328 times)

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Offline 3141592Topic starter

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Modding E3620A
« on: June 19, 2014, 02:43:03 pm »
Hello everyone,

I'm thinking of making the current limiting (which is supposed to be set at a constant 1.05A) on my E3620A PSU adjustable, by swapping the current limit calibration trimpots for some multiturn ones, or something along these lines. Now I have already posed this question to others, and they said that this might cause trouble with the current limiter's frequency compensation resulting in overshoot and oscillation along with possibly making the switch to CC mode slower. So I've put the project on hold. My question is whether if this is true? If this is true, what is the purpose of the frequency compensation in a current limiting circuit and what does it do exactly?

I was thinking of measuring the step response with the current set to a low value to test this, but I have no digital scope at hand to do this.

I hope I've posted this in the right section, thanks for any input.
 


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