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.