TPS92611-Q1: Designing a Short Circuit Detection and Continuity Check

Part Number: TPS92611-Q1
Other Parts Discussed in Thread: ATL431LI-Q1

Tool/software:

Hi everyone,

I'm in the process of designing a test jig/test bench and would really appreciate your suggestions and guidance.

The main objectives are:

  • Detect short circuits between two points and provide a clear indication (e.g., LED or buzzer).
  • Check for continuity between two other points and indicate whether the connection is good or not.
  • Send a signal to a controller (microcontroller or PLC) to log the result or trigger further action.
  • Ensure the overall system is safe for both the operator and the device under test (DUT) — no risk of damage or incorrect readings.

I'm looking for input on the following:

  • Reliable methods or circuit designs to detect shorts and verify continuity.
  • Techniques to prevent false positives/negatives, especially in noisy environments or with varying load conditions.
  • How best to interface the test jig with a controller for pass/fail status reporting.
  • Any recommended components (op-amps, comparators, opto-isolators, etc.) or reference designs you've found effective.

If you’ve worked on a similar system or have insights into best practices, I’d really appreciate your advice!

Thanks in advance!

  • Hello Viknesh,

    I see why you might be considering this device for short detection as its provides a constant current source.

    We have an app note that talks about discrete fault detection in the TPS92611-Q1 using the ATL431LI-Q1 as a comparator, however designing detection circuitry for other components would be outside the scope of this forum. www.ti.com/.../slvafe5

    Please let me know if I can assist you with any questions related to our LED drivers.

    Best,
    Isaiah