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REVERSE VOLTAGE PROTECTION ON INA3221

Terry Ding1
Prodigy 10 points

Hi,

I've been testing this part and have noticed that this part gets very hot when the voltage is reversed. I thought the IN+ and IN- pins are only sensing?

Other than using a diode to prevent reverse currents is there some method to allow this chip to work in reverse voltage conditions?

Thanks.

  • 0
    TI__Genius 14825 points

    Terry,


    Are the voltages on the VIN+ and VIN- pins, referenced to GND, going below -0.3V?


    Per the data sheet, page 2, the difference between VIN+ and VIN- can be -26V to 26V, however, at no time can VIN+ or VIN- be below -0.3V or above 26V. (Absolute maximum ratings table, footnote 2.)

    Best regards,

    Jason Bridgmon