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

3.1.2 Start-up With Enable

Use the following instructions to power up with ENABLE:

  1. Configure the jumper J1 position to the desired slew rate as described in Jumper Descriptions and Default Positions.
  2. Set the input supply voltage VIN to 54V and current limit to 5A.
  3. Connect a capacitive load of 1mF between VOUT (connector T2) and PGND (connector T3).
  4. Connect the input supply between VIN (connector T1) and PGND (connector T3).
  5. Turn on the power supply by keeping the device disabled using the switch SW1.
  6. Enable the eFuses by releasing the switch SW1.
  7. Observe the waveform at VOUT (TP5) and input current using an oscilloscope to measure the slew rate and rise time of the VOUT with a given input voltage of 54V.

The start-up profile of TPS1689EVM with ENABLE using two devices in parallel is shown in Figure 3-3.

TPS1689EVM TPS1689EVM Start-up Profile With ENABLE (VIN = 54V, EN Stepped Up From 0V to 5V, COUT = 1mF, and CDVDT = 82nF) Figure 3-3 TPS1689EVM Start-up Profile With ENABLE (VIN = 54V, EN Stepped Up From 0V to 5V, COUT = 1mF, and CDVDT = 82nF)