SLUAAS8 November   2024 TPS1210-Q1 , TPS4810-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2BMS System Overview
  6. 3Application of TPS1210-Q1 and TPS4810-Q1 to accomplish the Battery Disconnect Switch Design
    1. 3.1 Separate Charge and Discharge FET Control
    2. 3.2 Charge, Discharge FET Control With Pre-Charge Functionality
    3. 3.3 Current Sensing for Short Circuit Protection
    4. 3.4 Reverse Polarity Protection
    5. 3.5 Diagnostics
      1. 3.5.1 FET Diagnostics
      2. 3.5.2 Short Circuit Protection Comparator Diagnostics
      3. 3.5.3 Fault Indication
  7. 4Summary
  8. 5References

Short Circuit Protection Comparator Diagnostics

The short circuit event is highly critical for any system especially the BMS. The integrated short circuit protection comparator can be diagnosed to check its functionality by using the SCP_TEST pin. When the SCP_TEST pin is driven low to high then, a voltage is applied internally across the SCP comparator inputs to simulate a short circuit event. If the gate drive and FLT goes low then it indicates that the internal short circuit protection comparator is good otherwise it is to be treated as SCP feature is not functional. If the SCP_TEST feature is not used, then connect SCP_TEST pin to GND. The SCP comparator diagnosis can be performed before system startup.