SDAA247 January   2026 TPS2HCS10-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Melting Fuse Performance
    1. 2.1 Current Rating
    2. 2.2 Rerating Curve
    3. 2.3 I2T Values
      1. 2.3.1 Melting I2T
      2. 2.3.2 Arcing I2T
      3. 2.3.3 Total Clearing I2T
      4. 2.3.4 Fuse I2T Considerations
    4. 2.4 Opening Time
    5. 2.5 Voltage Rating
  6. 3TI Smart eFuse High-Side Switch Performance
    1. 3.1 Process/Voltage/Temperature Considerations
      1. 3.1.1 Max Operating Temperature
    2. 3.2 I2T Curve
      1. 3.2.1 Nominal Current Threshold (INOM)
      2. 3.2.2 I2T Fuse Threshold
      3. 3.2.3 Fixed-Delay Shutdown Threshold
      4. 3.2.4 Immediate Overcurrent Protection Threshold (IOCP)
    3. 3.3 Additional Protections and Diagnostics
      1. 3.3.1 Additional Protections
        1. 3.3.1.1 Short-to-Ground Protection
        2. 3.3.1.2 Capacitive Charging
        3. 3.3.1.3 Limp Home Mode/Watchdog/CRC
        4. 3.3.1.4 Reverse Battery Protection
        5. 3.3.1.5 Loss of Battery/Ground Protection
        6. 3.3.1.6 Integrated Inductive Discharge
      2. 3.3.2 Additional Diagnostics
  7. 4Switching from Melting Fuse to TI Smart eFuse High-Side Switch
    1. 4.1 Melting Fuse Design
    2. 4.2 Current Rating
    3. 4.3 I2T Trip Times
  8. 5Summary
  9. 6References

2.3.1 Melting I2T

Melting I2T is the thermal energy needed to melt the fuse's internal wire. This value is used when determining if a fuse is fit for allowing a specific transient current pulse.