SLVUDB5A June   2025  – November 2025

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 General Configurations
      1. 2.1.1 Physical Access
      2. 2.1.2 Test Equipment and Setup
  8. 3Implementation Results
    1. 3.1 Test Setup and Procedures
      1. 3.1.1 Supply Ramped From 0V to 54V — Start-up
      2. 3.1.2 Power Up Into Short
      3. 3.1.3 Undervoltage Lockout
      4. 3.1.4 Overvoltage Lockout
      5. 3.1.5 Overcurrent Event
      6. 3.1.6 Output Hot Short
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Drawings
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Revision History

3.1.3 Undervoltage Lockout

Follow the instructions to perform the undervoltage protection test:

  1. Set the input supply voltage VIN2 to 54V and current limit to 10A.
  2. Apply the supply between VIN2 (Connector J13) and PGND (Connector J11) and enable the power supply.
  3. Apply a load of 5A between VOUT2 (connector J14) and PGND (connector J12).
  4. Turn off the supply. Observe the waveforms using an oscilloscope.
TPS1686-87EVM Undervoltage Lockout Response of TPS1686 eFuse
Supply turned off, VIN(UVP) = 40V, COUT = 100uF, and ILOAD = 5A
Figure 3-4 Undervoltage Lockout Response of TPS1686 eFuse