SLVUCS1A july   2023  – august 2023 TPS7H2140-SEP

 

  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
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Connection Descriptions
      1. 2.1.1 Connectors
    2. 2.2 Variable Resistors for CS and CL
      1. 2.2.1 Current Sense Resistor
      2. 2.2.2 Current Limit Resistors
    3. 2.3 Open-Load Detection Pull-Up Resistors
    4. 2.4 Connecting Channels In Parallel
  7. 3Implementation Results
    1. 3.1 Separated Output Results
      1. 3.1.1 Power Up and Power Down
      2. 3.1.2 Enable and Disable
      3. 3.1.3 Current Sensing
      4. 3.1.4 Load Step Effects Across Output Channels
      5. 3.1.5 Overcurrent Protection
    2. 3.2 Modified Configuration Results
      1. 3.2.1 Short-to-GND (Fast-Trip) Overcurrent
  8. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials
  9. 5Additional Information
    1.     Trademarks
  10. 6Related Documentation
  11. 7Revision History

2.3 Open-Load Detection Pull-Up Resistors

  • For the most accurate and detailed guidance, please refer to the Open-Load Detection section of the TPS7H2140-SEP data sheet

The TPS7H2140-SP has the ability to detect an open load on a disabled output channel. For this feature to be functional, a pull-up resistor is required between VIN and the output channel. The TPS7H2140EVM board includes pull-up resistors and jumpers to toggle this functionality. By inserting shunts in J20-J24, each output channel can be pulled up through the included 20 kΩ resistors to enable the open-load detection. When an open load is detected on any disabled channel, the FAULT pin is pulled low. Therefore, when using the TPS7H2140EVM with less than all four channels being loaded, the shunts for each disabled and unloaded channel must be removed for the FAULT pin to report accurately.