SLVUC34 March   2021 TPS2521

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  3. 2Description
  4. 3Schematic
  5. 4General 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. 5Test Setup and Procedures
    1. 5.1 Start up the eFuse
    2. 5.2 Over Current Test
    3. 5.3 Output Hot-Short Test
    4. 5.4 Power Up into Short Test
    5. 5.5 Overvoltage Clamp Test
    6. 5.6 Reverse Current Blocking Test
  7. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  8. 7Bill Of Materials (BoM)

5.1 Start up the eFuse

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

  1. Set Jumper J3 position to desired slew rate as mentioned in Table 4-3.
  2. Set the input supply voltage VIN to 5 V and current limit of 10 A.
  3. Connect the supply between VIN and PGND points of connector J1. Enable the power supply.
  4. 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 5 V.

Figure 5-2 and Figure 5-3 shows example of inrush current captured on the TPS25210EVM eFuse Evaluation Board.

GUID-20210329-CA0I-RSZ1-TJ02-HLJ0KTTVF3GS-low.gifFigure 5-2 TPS25210x Start Up with Enable at VIN = 5 V, Cout = 220 uF, CdVdT = OPEN
GUID-20210329-CA0I-LDNK-5LRZ-BSN7RLCL9NMP-low.gifFigure 5-3 TPS25210x Inrush Current with Capacitive Load at VIN = 5 V, Cout = 690 uF, CdVdT = 3300 pF