I have a requirement wherein I have to measure a 12V that powers stepper motor ICs, the current can range from a few milliamps to 1.5A. Since the stepper motor IC has internal H bridges and I had to do high-side current sensing, so I settled upon INA220 IC.
Following are my queries (Please refer to the attached reference Image ) -
- What junction should the VBUS be connected to, IN+ or IN-, and what is the role of the VBUS connection in each case? I have seen in the datasheet it's connected to IN+ or IN- in different instances.
- What would be the apt Sense resistor in this case(5mA - 1.5A)?
- I have attached the schematic and Layout snips, I'd appreciate some feedback or corrections if necessary.