Recently I am designing 2 separate pcb. one of them will be controller with low current signal paths and the other one will have mosfets to control high currents(about 10A). I am thinking of connecting 2 boards with a board to board connector. I need to carry 3 signal paths, ground and 12V to the controller board. I have a regulator on controller board regulates 12V to 3.3V. both has own ground plane.
the question is I am not sure about connecting grounds with a standard male-female headers, on the controller side I have IC's with multiple ground connections. is there any possibility to occur ground loop, ground current? if yes how can I prevent? is there any special connector types or circuits that does the trick?
the power supply will be plugged into the high current side of course and I am talking about something like this: