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INA219: maximum current value

Lillian Liu(SH)
Expert 4620 points
Part Number: INA219


Hi team, 

Asus is using the INA219 in their notebook applications. What is the maximum current value that INA219 can detect? Can 200A be detected? If so, can you recommend a suitable peripheral circuit design? If not, can you recommend another suitable IC?

Thanks 

Lillian

  • 0
    TI__Expert 6602 points

    Lillian, 

    Any of our current sense amplifiers with an external shunt resistor may be used to detect 200A. In order for us to recommend a suitable peripheral design, we would need more information on the desired parameters:

    • What power budget is the customer working with? Power consumption is a major factor in choosing a shunt resistor. 
    • What common mode voltage will be applied?
    • What is the minimum current you are trying to measure? 
    • Will the 200A be consistent, or will it peak at 200A and then remain at a constant lower current? Any more information on the current waveform being applied would be helpful. 

    All of these factors will help us determine whether or not the INA219 would be suitable for the application. Another option would be the INA234, which is a newer IC which behaves similarly to the INA219 while also being slightly cheaper. More information on choosing a shunt resistor can be found in our TIPL series. Navigate to the "How to choose a shunt resistor" video in the Current sense amplifier applications section. 

    Best, 

    Mohamed