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TPS2H160-Q1: How to distinguish which channel the fault occurred in？

Ansel Song
Expert 3890 points
Part Number: TPS2H160-Q1

Hi team,

As we know, this device has 2 channels output. How to distinguish which channel the fault occurred in? like short or open? Thank you.
Best regards,
Ansel
  • 0
    TI__Mastermind 34905 points

    Ansel,

    The fault pin is ORed together for the two channels so there is no way to actually tell from the fault pin alone which channel the fault occured on. You can possibly use the current sense to detect on an attached MCU the load current the device is drawing and determine from there which load is connected/faulted.

  • 0 in reply to Timothy Logan
    TI__Expert 3890 points

    Hi Timothy,

    Yes, you are right. But I can read the ST1 & ST2  status, each pin for its respective channel for the version A. 

    But what is the difference between ST1 and ST2 relative to Fault? When ST1 or ST2 is faulty, Fault must also be faulty?
    Thanks.
    Ansel
  • 0 in reply to Ansel Song
    TI__Mastermind 34905 points

    Ansel,

    Maybe I am misunderstanding your question...

    On version A of the device you can differentiate between each channel's fault with ST1 and ST2. There is no FAULT pin on Version A.

    On version B of the device the FAULT pin will go low when a fault exists on the device and the CS pin will output a voltage of VCS(H). There is no way to differentiate channel faults on Version B without going through the CS pin on an MCU.