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

Fault Indication

The fault indication is an important feedback from the IC to the BMS. In an event of a short circuit fault, gate driver UVLO, UVLO and SCP_TEST, the FLT is asserted. The FLT is an open drain pin, and when pulled up to a voltage source with the help of a resistor, the FLT reads high when there is no fault and during a fault condition, the pin reads low. The value of resistor to be used can be determined from the specifications of the FLT pin from the data sheet.