High current sensor board

Thread Starter


Joined Dec 27, 2016

My boss asked me to design a high current ( up to 50 A) sensor board for a research prototype and after not having done anything analog related for a couple of years now( We are EE but we are in the power industry) it's been a bit of a relearning curve. However, I can't seem to get an differential output for any currents that I'm putting across my chip. I was very careful when soldering and did continuity checks to make sure that the connectors were indeed connected to the polygons. I'm starting to wonder if its something wrong with my design. Any help would be much appreciated!

Design assumptions:
IPC-2221 and assumed a trace width of 16.6 mm.
Used a MLX91210 hall effect current sensor
Boss wanted a voltage divider off the main current input as a means to detect voltage.