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

2.4 Fault Detection Logic Summary

Figure 2-7 illustrates final flow of logic of the fault detection circuit.

GUID-20220810-SS0I-QK1Z-FFGD-473LLXR98NRP-low.png Figure 2-7 Discrete Fault Detection Logic Flowchart

As Figure 2-7 shows, the comparator output (Vcomp), is used to distinguish if a SG, OT or SB, OL has occurred. If a SB or OL has occurred, Vcomp can be used to further distinguish between the two after PWM is pulled LOW. For SG, OT conditions, the fault pin is used along with the PWM pin to distinguish between a SG or OT fault.