SLVUCH7A september   2022  – june 2023 TPS25990

 

  1.   1
  2.   TPS25990EVM: Evaluation Module for TPS25990 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 and Setup
      1. 4.2.1 Power supplies
      2. 4.2.2 Meters
      3. 4.2.3 Oscilloscope
      4. 4.2.4 USB-to-GPIO Interface Adapter
      5. 4.2.5 Loads
  8. 5Test Setup and Procedures
    1. 5.1  Hot Plug
    2. 5.2  Start-up with Enable
    3. 5.3  Current Limit Based Start-up Behavior
    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 TPS25990EVM
  9. 6Using the TPS25990EVM-GUI
    1. 6.1 Access the TPS25990EVM-GUI
    2. 6.2 Introduction to the TPS25990EVM-GUI
    3. 6.3 Establishing Communication Between the EVM and GUI
    4. 6.4 Quick Info
    5. 6.5 Configuration
    6. 6.6 Telemetry
    7. 6.7 Blackbox
    8. 6.8 Register Map Page
  10. 7EVAL Board Assembly Drawings and Layout Guidelines
    1. 7.1 PCB Drawings
  11. 8Bill Of Materials (BOM)
  12. 9Revision 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 the current limit to 100 A. Connect 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.
Note:

The input TVS diodes need to be removed during the overvoltage protection test. Make sure to put them back after this experiment.

Figure 5-8 shows overvoltage lockout response of TPS25990 eFuse on TPS25990EVM.

GUID-315486CB-8219-46CF-B5B8-6BF5A1341916-low.svg Figure 5-8 Overvoltage Lockout Response of TPS25990 eFuse (VIN Ramped Up from 12 V to 18 V, COUT = 470 μF, and RLOAD = 1.2 Ω)