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INA310A-Q1: Power dissipation

prema k
Prodigy 90 points

Part Number: INA310A-Q1

Hi Sir/Madam,

For Current sense amplifier (INA310A-Q1) how to calculate the power dissipation?

Please provide the formula.

  • 0
    TI__Genius 10835 points

    Hello,

    There are two main sources of power dissipation in a current-shunt amplifier system:

    The first is the power dissipated by the shunt resistor due to the current, calculated as P = I²R, where R is the shunt resistor resistance and I is the current flowing through the shunt resistor.

    The second is the power dissipated by the amplifier itself, which can be computed from the quiescent current, as well as the output currents you expect for your application:

    For the INA310A-Q1, the supply voltage is normally 5V*1.6mA = 8mW. This is in addition to the power dissipated by the output of the amplifier itself, which will depend on your system.

    Let me know if you have any more questions,

    Levi DeVries

  • 0 in reply to Levi DV
    TI__Genius 10835 points

    Also note this FAQ, which covers all the sources of power consumption for a typical CSA in more detail.

    Levi DeVries