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TPS2HB08-Q1: Fault acknowledgement

Naveen Bevara
Intellectual 1970 points
Part Number: TPS2HB08-Q1

Hi, 

One of my customer is interested to evaluate TPS2HB08-Q1. They have below query. Can you please comment. 

"It looks like the device provides a common fault indication for open-load and short circuit condition. Is there a way differentiate whether the fault indication is due to open-load or short circuit?"

  • 0
    TI__Genius 16095 points

    Hi Naveen,

    Thanks for reaching out on E2E!

    By looking at the fault indicator, there is not a way to differentiate between a fault indication due to an open-load versus a fault indication due to a short circuit. Could you elaborate on why you want to distinguish these conditions?

    Best Regards,

    Elizabeth

    Please click "This resolved my issue" button if this post answers your question.

  • 0 in reply to Elizabeth Higgins
    TI__Intellectual 1970 points

    Hi Elizabeth, 

    Customer did not disclose the reason to distinguish the conditions. He is interested to test the device, if there is a way to differentiate, even using some additional circuit around the device. 

  • 0 in reply to Naveen Bevara
    TI__Genius 16095 points

    Naveen,

    To differentiate between an open circuit and a short to battery condition, you can set EN = 0, DIAG_EN = high. and if SNS is high (if there is a fault), check the output. If the output voltage is equal to the supply voltage, then you have a short to battery. If the output is not equal to the input voltage, then you have an open circuit. This could be done through resistor dividers and logic circuitry at the output.

    Best Regards,

    Elizabeth

    Please click "This resolved my issue" button if this post answers your question.