Electronics > Projects, Designs, and Technical Stuff
High power current sense resistor resistance/voltage drop during inrush current
aiq25:
--- Quote from: NANDBlog on February 20, 2019, 08:49:43 am ---Oh, OK, so the amplifier is not measured. Did you take care about ground loops then?
Also, the current clamp are not "broken", they just are not made to handle this situation well. It is combination of the core characteristics, and the hall effect sensor's characteristics, and the surrounding circuit's with their own problems.
--- End quote ---
I'm thinking it is some kind of parasitic component. I have tried to take care of ground loops and reviewed the layout extensively, don't see any way for it to be a ground loop. The reason I'm thinking its a parasitic component is under normal operating (load current < 1-2 Amps) the circuit behaves as expected. It is only during high inrush currents it has this weird behavior.
The current probe is 50MHz, so it should have quite good frequency response/bandwidth.
It is not the current sense resistors because I tried high power, pulse withstanding ones now.
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