SLVUCW7A September   2024  – April 2025 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
  11. 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 TPS1685 eFuse on TPS1685EVM is shown in Figure 3-5.

TPS1685EVM Undervoltage Lockout Response of TPS1685 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 TPS1685 eFuse (VIN Ramped Down from 54V to 38V and Ramped Up to 54V, VIN(UVP)=40V, COUT = 1mF, and RLOAD = 50Ω)