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

3.1.2 Start-up with Enable

Use the following instructions to power up the TPS1685 eFuse with ENABLE:

  1. Configure the jumper J1 position to the desired slew rate as described in 7.
  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 (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 start-up profile of TPS1685 eFuse with ENABLE using two devices in parallel is shown in Figure 3-3.

TPS1685EVM TPS1685 eFuse Start-up Profile with ENABLE (VIN = 54V, EN Stepped Up from 0V to 5V, COUT = 1mF, and CDVDT = 82nF)Figure 3-3 TPS1685 eFuse Start-up Profile with ENABLE (VIN = 54V, EN Stepped Up from 0V to 5V, COUT = 1mF, and CDVDT = 82nF)