SLVUD40 November   2024 TPS25984B

 

  1.   1
  2.   TPS25984BEVM: Evaluation Module for TPS25984B eFuse
  3.   Trademarks
  4. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  5. 2Description
  6. 3Schematic
  7. 4General Configurations
    1. 4.1 Physical Access
    2. 4.2 Test Equipment
      1. 4.2.1 Power Supplies
      2. 4.2.2 Meters
      3. 4.2.3 Oscilloscope
      4. 4.2.4 Loads
  8. 5Test Setup and Procedures
    1. 5.1  Hot Plug
    2. 5.2  Start-Up With Enable
    3. 5.3  Difference Between Current Limit and DVDT Based Start-Up Mechanisms
    4. 5.4  Power Up Into Short
    5. 5.5  Overvoltage Lockout
    6. 5.6  Transient Overload Performance
    7. 5.7  Overcurrent Event
    8. 5.8  Output Hot Short
    9. 5.9  Quick Output Discharge (QOD)
    10. 5.10 Thermal Performance of TPS25984BEVM
  9. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  10. 7Bill of Materials (BOM)

5.5 Overvoltage Lockout

Use the following instructions to perform the overvoltage protection test:

  1. Set the input supply voltage VIN to 12V and current limit to 100A. Apply the supply between VIN (Connector T1) and PGND (Connector T3) and enable the power supply.
  2. Apply a load of 1.2Ω between VOUT (Connector T2) and PGND (Connector T3).
  3. Increase the input supply VIN from 12V to 18V and observe the waveforms using an oscilloscope.

Figure 5-10 shows overvoltage lockout response of TPS25984B eFuse on TPS25984BEVM eFuse Evaluation Board.

Note: The input TVS diodes must be removed during the overvoltage protection test. Make sure to put the diodes back after this experiment.
TPS25984BEVM Overvoltage Lockout Response of TPS25984B eFuse
VIN Ramped Up from 12V to 18V, COUT = 470μF, and RLOAD = 1.2Ω
Figure 5-10 Overvoltage Lockout Response of TPS25984B eFuse