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TPS389006-Q1: Interrupt Pin Fault

James Dougherty
Prodigy 20 points
Part Number: TPS389006-Q1

Tool/software:

Hi Folks,

We are testing out our HW and having great luck with this chip. However, we found an interesting interrupt occurs

and we are not sure why or what it means. 

We also found in the datasheet that the minimum voltage of the nIRQ pin is 0 and the max is 5V.

Does that just mean (since the chip operates from 2.5 to 5.5) it will provide a level interrupt at the same voltage as VDD?

What does 0 volts mean for the IRQ Pin?

Thank you very much!

-James

  • 0
    Prodigy 20 points

    Hi, can someone explain this interrupt to me?

  • 0 in reply to James Dougherty
    TI__Expert 8620 points

    Hello James, 

    We apologize for the delay, this thread was not properly assigned to our team. 

    In regards to the F_NIRQ this is typically due to the NIRQ pin being shorted to a “high” signal like VDD. For example, say a monitor fault just happened the NIRQ pin will attempt to enter a low state. Now if the NIRQ pin has a short path to a high voltage during this time, the device will signal a mis-match in NIRQ pin state (F_NIRQ).

    Regards, 

    Oscar Abmriz