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INA240: Check INA240A1 can be used in this condition

Chun Chang
Prodigy 10 points
Part Number: INA240

Hi there,

I just want to check is that possible INA240A1 can be used in this condition:

Vdc=48V

Current sensing type: 3phase inline current sense

Shunt resistor: 3mohm*2  in parallel

Maximum continues current: 110A

Maximum pulsed current: 200A @1ms

If those conditions is not recommand use INA240

Could you recommand another solution for those condition?

Thanks

Kevin

  • 0
    TI__Expert 3450 points

    Kevin,

    Chun Chang said:
    Current sensing type: 3phase inline current sense
    Chun Chang said:
    Maximum pulsed current: 200A @1ms

    Do you need to sense current during 200A or do you need this to be a bidirectional current sensor? If either of these things is true the gain of the INA240 will be too high for your application. I would reccomend the INA241x1 or INA296x1 which both have gains of 10V/V. The INA241 in particular is made for switching applications and so would be ideal for dealing with current pulses such as you describe. 

    Chun Chang said:
    Vdc=48V

    I am assuming that the voltage never goes below -4V, the operational limit of the device.

    Let me know if you have any more questions,

    Levi DeVries

  • 0 in reply to Levi Devries
    Prodigy 10 points

    Hi Levi,

    Levi Devries said:
    Do you need to sense current during 200A or do you need this to be a bidirectional current sensor?

    Yes, both condition are what I need.

    Thanks for your suggestion and I will consider INA241x1 for my design.

    Kevin