SLVUD44A March   2025  – October 2025 TPS1689

 

  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
        1. 2.1.2.1 Power supplies
        2. 2.1.2.2 Meters
        3. 2.1.2.3 Oscilloscope
        4. 2.1.2.4 USB-to-GPIO Interface Adapter
        5. 2.1.2.5 Loads
  8. 3Implementation Results
    1. 3.1 Test Setup and Procedures
      1. 3.1.1 Hot Plug
      2. 3.1.2 Start-up With Enable
      3. 3.1.3 Power Up Into Short
      4. 3.1.4 Undervoltage Lockout
      5. 3.1.5 Overvoltage Lockout
      6. 3.1.6 Overcurrent Event
      7. 3.1.7 Output Hot Short
      8. 3.1.8 Thermal Performance of TPS1685EVM
  9. 4Using the TPS1689EVM-GUI
    1. 4.1 Access the TPS1689EVM-GUI
    2. 4.2 Introduction to the TPS1689EVM-GUI
    3. 4.3 Establishing Communication Between the EVM and GUI
    4. 4.4 Quick Info
    5. 4.5 Configuration
    6. 4.6 Telemetry
    7. 4.7 Register Map Page
  10. 5Hardware Design Files
    1. 5.1 Schematic
    2. 5.2 PCB Drawings
    3. 5.3 Bill OfmAterials (BOM)
  11.   Trademarks
  12. 6Revision History

3.1.4 Undervoltage Lockout

Use the following instructions to perform the overvoltage protection test:

  1. Set the input supply voltage VIN to 54V and current limit to 5A. Apply the supply between VIN (Connector T1) and PGND (Connector T3) and enable the power supply.
  2. Apply a load of 50Ω between VOUT (connector T2) and PGND (connector T3).
  3. Decrease the input supply VIN from 54V to 38V and increase to 54V again, and observe the waveforms using an oscilloscope.

The undervoltage lockout response of TPS1689 eFuse on TPS1689EVM is shown in Figure 3-5.

TPS1689EVM Undervoltage Lockout Response of TPS1689 eFuse (VIN Ramped Down From 54V to 38V and Ramped Up to 54V, VIN(UVP) = 40V, COUT = 1mF, and RLOAD = 50Ω) Figure 3-5 Undervoltage Lockout Response of TPS1689 eFuse (VIN Ramped Down From 54V to 38V and Ramped Up to 54V, VIN(UVP) = 40V, COUT = 1mF, and RLOAD = 50Ω)