SLVUCK4A march   2023  – july 2023 TPS25948

 

  1.   1
  2.   TPS25948EVM: Evaluation Module for TPS25948 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 Loads
  8. 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
    6. 5.6 Priority Power Mux Test
  9. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  10. 7Bill Of Materials (BOM)
  11. 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 J5 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 9 A. Enable the power supply.
  3. Hot-plug the supply between VIN1 and PGND1 points of connector J2.
  4. Observe the waveform at VOUT1 (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 TPS25948EVM eFuse evaluation board.

GUID-20230213-SS0I-RJD2-DVLV-HPS1WB4LTZ5H-low.svg Figure 5-2 TPS25948 Output Rise Profile (VIN = 12 V, Cout = 220 µF, CdVdT = OPEN, RILM = 536 Ω, No Load)