SLVUD02A April   2025  – May 2026

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
      1. 1.3.1 Negative Rail Sensing
      2. 1.3.2 Configuration for Push-Pull vs Open-Drain
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Important Usage Notes
    3. 2.3 Connector Descriptions
  7. 3Implementation Results
    1. 3.1 Default Configuration Results
    2. 3.2 Enable and Disable
    3. 3.3 Undervoltage and Overvoltage Monitoring (MODE=0)
    4. 3.4 Window and Overvoltage Monitoring (MODE=1)
    5. 3.5 WDOb
  8. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials (BOM)
    3. 4.3 PCB Layouts
  9. 5Compliance Information
    1. 5.1 Compliance and Certifications
  10. 6Related Documentation
  11. 7Revision History

1.3.1 Negative Rail Sensing

The TPS7H3xx4EVM-CVAL board allows Channel 3 and 4 to be configured for sensing negative rails. This is done by removing a 0-ohm resistor that connects from the SENSEx resistor dividers to GND and replacing it with a 0-ohm resistor that instead sets VLDO as the reference. The datasheet contains more detailed information and equations for how to select appropriate resistor values when using this configuration.

TPS7H3xx4EVM-CVAL Negative Rail Sensing CircuitryFigure 1-2 Negative Rail Sensing Circuitry