SLVUCH6A July   2023  – November 2023 TPS25984

 

  1.   1
  2.   TPS25984EVM: Evaluation Module for TPS25984 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  Provision to Apply Load Transient and Overcurrent Event Using an Onboard Switching Circuit
    9. 5.9  Output Hot Short
    10. 5.10 Quick Output Discharge (QOD)
    11. 5.11 Thermal Performance of TPS25984EVM
  9. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  10. 7Bill of Materials (BOM)
  11. 8Revision History

5.5 Overvoltage Lockout

Use the following instructions to perform the overvoltage protection test:

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

Figure 5-10 shows overvoltage lockout response of TPS25984 eFuse on TPS25984EVM 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.
GUID-1C47FC6C-15DE-4CAF-A56F-5BBDF5134193-low.svg
VIN Ramped Up from 12 V to 18 V, COUT = 470 μF, and RLOAD = 1.2 Ω
Figure 5-10 Overvoltage Lockout Response of TPS25984 eFuse