SLUUCB4 June   2020 TPS25980

 

  1.   TPS25980EVM: Evaluation Module for TPS25980x efuse
    1.     Trademarks
    2. 1 Introduction
      1. 1.1 EVM Features
      2. 1.2 EVM Applications
    3. 2 Description
    4. 3 Schematic
    5. 4 General Configurations
      1. 4.1 Physical Access
      2. 4.2 Test Equipment and Set up
        1. 4.2.1 POWER SUPPLIES
        2. 4.2.2 METERS
        3. 4.2.3 OSCILLOSCOPE
        4. 4.2.4 LOADS
    6. 5 Test Setup and Procedures
      1. 5.1 Hot-Plug Test
      2. 5.2 Current Limit Test
      3. 5.3 Output Hot-Short Test
      4. 5.4 Wakeup into Short Test
      5. 5.5 Overvoltage Cut-off Test
    7. 6 EVAL Board Assembly Drawings and Layout Guidelines
      1. 6.1 PCB Drawings
    8. 7 Bill Of Materials (BoM)

5.2 Current Limit Test

Use the following instructions to perform current limit test:

  1. Place jumper J9 in 3-4 Position to set 2 ms for ITIMER.
  2. Set the input supply voltage VIN to 12 V and current limit of 15 A and enable the power supply.
  3. Place jumper J10 in 7-8 Position to set 8 A current limit.
  4. Set the electronic load to 6 A and connect between VOUT and GND. Enable the electronic load.
  5. Now apply overload of 4 A (using resistive load of 3 Ohm) between VOUT and GND.
  6. The device allows the overload current for the programmed ITIMER period for example, 2 ms and then switches OFF.
  7. Place jumper J10 at other settings to test at various current limits.

Figure 4 shows an example of current limit at 8 A on the TPS25980EVM eFuse Evaluation Board.

TPS25980 CB-zoom.pngFigure 4. Over Current Response of TPS259804O for 8 A Current Limit Setting