SLVUCE5A April   2022  – June 2022

 

  1.   TPS25981EVM: Evaluation Module for TPS25981 eFuse
  2.   Trademarks
  3. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  4. 2Description
  5. 3Schematic
  6. 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 Loads
  7. 5Test Setup and Procedures
    1. 5.1 Hot-Plug Test
    2. 5.2 Overcurrent Test
    3. 5.3 Output Hot-Short Test
    4. 5.4 Wakeup into Short Test
    5. 5.5 Overvoltage Test
  8. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  9. 7Bill Of Materials (BoM)
  10. 8Revision History

5.1 Hot-Plug Test

Use the following instructions to measure the inrush current during the Hot-Plug event on channel 1:

  1. Set Jumper J15 position to the desired slew rate as mentioned in Table 4-3.
  2. Set the input supply voltage VIN to 12 V and current limit of 12 A. Enable the power supply.
  3. Hot-plug the supply between VIN1 and PGND1 points of connector J9.
  4. Observe the waveform at VOUT1 (TP30) and input current with an oscilloscope to measure the slew rate and rise time of the eFuse with a given input voltage of 12 V.

Figure 5-2 shows an example of inrush current captured on the TPS25981EVM eFuse evaluation board.

GUID-20220327-SS0I-GV56-SFNG-N09R2C5BHXCR-low.pngFigure 5-2 TPS259814 Output Rise Profile (VIN = 12 V, Cout = 10 uF, CdVdT = OPEN, RILM = 604 Ω, No Load)