Part Number: INA232
Tool/software:
Hey,
lets say I have an output voltage from a dc/dc converter at max 20V and max I_out = 3A
How should I wire up the INA232 to measure the current through a load resistor at the output of my dc dc converter? And what shunt do i need?
Put the shunt resistor below or above the load. (If you do not want a ground offset between the load and the rest of the system, use a high-side shunt.)
The INA232 can use a full-scale range of either 20 mV or 80 mV, so you should size the shunt resistor to generate that voltage drop for the maximum current that you want to be able to measure.
Stefan,
The difference in the 20mV and 80mV range is the resolution of your measurement, along with the maximum current you want to be able to measure. It's described here in section 8.1.1 of the datasheet.
I would suggest you watch our TIPL training video titled "How to choose a shunt resistor" here for help on picking your appropriate shunt resistor.
Please let us know if you have any other questions.
Louis
Stefan,
Yes, the CURRENT register returns a HEX number, noted by the h following the reset value.
Louis
