SLVSHM2B March   2025  – October 2026 TPS2HC120-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 SNS Timing Characteristics
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Pin Current and Voltage Conventions
      2. 7.3.2 Low Power Mode
        1. 7.3.2.1 Entry Into LPM
        2. 7.3.2.2 During LPM
        3. 7.3.2.3 Exiting LPM
      3. 7.3.3 Accurate Current Sense
      4. 7.3.4 Adjustable Current Limit
      5. 7.3.5 Inductive-Load Switching-Off Clamp
      6. 7.3.6 Fault Detection and Reporting
        1. 7.3.6.1 Diagnostic Enable Function
        2. 7.3.6.2 Multiplexing of Current Sense
        3. 7.3.6.3 FLT Reporting
        4. 7.3.6.4 Fault Table
      7. 7.3.7 Full Diagnostics
        1. 7.3.7.1 Short-to-GND and Overload Detection
        2. 7.3.7.2 Open-Load Detection
          1. 7.3.7.2.1 Channel On
          2. 7.3.7.2.2 Channel Off
        3. 7.3.7.3 Short-to-Battery Detection
        4. 7.3.7.4 Reverse-Polarity and Battery Protection
        5. 7.3.7.5 Thermal Fault Detection
          1. 7.3.7.5.1 Thermal Protection Behavior
      8. 7.3.8 Full Protections
        1. 7.3.8.1 UVLO Protection
        2. 7.3.8.2 Loss of GND Protection
        3. 7.3.8.3 Loss of Power Supply Protection
        4. 7.3.8.4 Reverse Battery Protection
        5. 7.3.8.5 Protection for MCU I/Os
    4. 7.4 Device Functional Modes
      1. 7.4.1 Working Modes
        1. 7.4.1.1 SLEEP
        2. 7.4.1.2 DIAGNOSTIC
        3. 7.4.1.3 ACTIVE
        4. 7.4.1.4 STANDBY DELAY
        5. 7.4.1.5 LOW POWER MODE
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 EMC Transient Disturbances Test
    3. 8.3 Typical Application
      1. 8.3.1 Design Requirements
      2. 8.3.2 Detailed Design Procedure
      3. 8.3.3 Application Curves
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Examples
        1. 8.5.2.1 Without a GND Network
        2. 8.5.2.2 With a GND Network
  10. 9 Device and Documentation Support
    1. 9.1 Third-Party Products Disclaimer
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.3.8.3 Loss of Power Supply Protection

When loss of supply occurs, output is turned off regardless of whether the input is high or low. For a resistive or capacitive load, loss of supply protection is easy to achieve due to no more power. The worst case is a charged inductive load. In this case, the current is driven from all of the IOs to maintain the inductance output loop. TI recommends either the MCU serial resistor plus the GND network (diode and resistor in parallel) or external free-wheeling circuitry.

TPS2HC120-Q1 Loss of BatteryFigure 7-22 Loss of Battery