SLVAFE5 September   2022 TPS92610-Q1 , TPS92611-Q1 , TPS92612-Q1 , TPS92613-Q1

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2TPS9261x-Q1 Fault Detection and Discrete Fault Detection Introduction
    1. 2.1 Discrete Fault Detection
    2. 2.2 Open Load vs Short-to-Battery Detection
    3. 2.3 Short to Ground vs Overtemperature Detection
    4. 2.4 Fault Detection Logic Summary
  5. 3Discrete Fault Detection Circuit Details
    1. 3.1 Simulation
    2. 3.2 PCB Implementation
    3. 3.3 Test Setup
    4. 3.4 Thermal Testing for Overtemperature Conditions
  6. 4Conclusion
  7. 5References

4 Conclusion

The discrete fault detection circuit utilizes the ATL431LI-Q1 to differentiate fault conditions that affect the TPS9261x-Q1 output. With the addition of the ATL431L1-Q1 and simple MCU logic, the MCU can differentiate between an overtemperature, short to battery, short to ground, and open load condition. Furthermore, this discrete solution is both cost-effective and compact requiring only a single additional comparator and minimal passive components. By implementing this simple fault detection circuit customers can detect specific faults that occur on the TPS9261x-Q1 output and report this information to the driver and other vehicle electronic control units.