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

3.1.9 Quick Output Discharge (QOD)

Use the following instructions to observe the Quick Output Discharge (QOD) functionality:

  1. Set the input supply voltage VIN to 54V and current limit to 10A. Turn ON the power supply.
  2. Use the switch SW1 to connect the EN/UVLO pin to ground to do power cycling.
  3. Use the switch SW2 to enable the QOD by making the voltage at EN/UVLO pin approx. 1.1V.
  4. Observe the waveforms of VIN (TP1), VOUT (TP2), EN (TP3), and SWEN (TP4) using an oscilloscope.

The turn-off performance of the TPS1685 eFuse with QOD enabled is shown in Figure 3-11. The turn-off performance with QOD disabled on the TPS1685EVMuse Evaluation Board is shown in Figure 3-12.

TPS1685EVM QOD Enabled on TPS1685 eFuse (VIN = 54V, COUT = 1mF, and EN Pulled Low to 1V)Figure 3-11 QOD Enabled on TPS1685 eFuse (VIN = 54V, COUT = 1mF, and EN Pulled Low to 1V)
TPS1685EVM QOD Disabled on TPS1685 eFuse (VIN = 54V, COUT = 1mF, and EN Pulled Low to 0V)Figure 3-12 QOD Disabled on TPS1685 eFuse (VIN = 54V, COUT = 1mF, and EN Pulled Low to 0V)