SLVUCW7 September   2024 TPS1685

 

  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 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  Transient Overload Performance
      7. 3.1.7  Overcurrent Event
      8. 3.1.8  Output Hot Short
      9. 3.1.9  Quick Output Discharge (QOD)
      10. 3.1.10 Thermal Performance of TPS1685EVM
  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

3.1.1 Hot Plug

Use the following instructions to measure the inrush current during a hot plug event:

  1. Configure the jumper J1 position to the desired start-up slew rate as detailed in 7.
  2. Connect a capacitive load of 1mF between VOUT (Connector T2) and PGND (Connector T3).
  3. Connect the negative terminal of the power supply to connector T3.
  4. Set the input supply voltage VIN to 54V and current limit to 5A. Enable the power supply.
  5. Hot plug the positive terminal of the power supply at connector T1.
  6. Observe the waveforms at VOUT (TP2) 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 examples of the hot plug event captured on the TPS1685EVM with two TPS1685 devices in parallel are shown in Figure 3-2.

TPS1685EVM TPS1685 eFuse Hot Plug Profile (VIN Stepped Up from 0V to 54V, COUT = 1mF, and CDVDT = 82nF) Figure 3-2 TPS1685 eFuse Hot Plug Profile (VIN Stepped Up from 0V to 54V, COUT = 1mF, and CDVDT = 82nF)