SLVUCK3 December   2022 TPS25961

 

  1.   TPS25961EVM: Evaluation Module for TPS25961 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)

5.1 Hot-Plug Test

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

  1. Set the input supply voltage VIN to 12 V and current limit of 2 A. Enable the power supply.
  2. Hot-plug the supply between VIN and PGND points of connector J1.
  3. Observe the waveform at VOUT (TP2) 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 TPS25961EVM eFuse evaluation board.

Figure 5-2 TPS25961 Output Rise Profile (VIN = 12 V, Cout = 1uF,RILM = 23.2kΩ, No Load)