SLUUCW7 july   2023 TPS25983

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Test Points and Connectors
    2. 2.2 Test Equipment and Set Up
      1. 2.2.1 Power Supplies
      2. 2.2.2 Meters
      3. 2.2.3 Oscilloscope
      4. 2.2.4 Loads
    3. 2.3 Test Setup and Procedures
      1. 2.3.1 Hot-Plug Test
      2. 2.3.2 Current Limit Test
      3. 2.3.3 Output Hot-Short Test
      4. 2.3.4 Wakeup into Short Test
      5. 2.3.5 Overvoltage Cut-off Test
  8. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layouts
    3. 3.3 Bill Of Materials (BOM)
  9. 4Additional Information
    1.     Trademarks

2.3.1 Hot-Plug Test

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

  1. For checking inrush current control capability, insert additional capacitance of 1800 uF at C16 terminals. Total output capacitance = 1800 uF + 220 uF approx. 2 mF.
  2. Set Jumper J12 in 3-4 position to set Cdvdt at 10 nF for o/p slew rate of 0.5 V/ms.
  3. Set the input supply voltage VIN to 12 V and current limit of 5 A. Enable the power supply.
  4. Hot-plug the supply between input connectors J1 and J3.
  5. Observe the waveform at VOUT (TP2) with an oscilloscope to measure the slew rate and rise time of the eFuse with a given input voltage of 12 V.

Figure 3-2 shows an example of inrush current captured on the TPS25983EVM eFuse Evaluation Board.

GUID-8993A194-D44D-458E-8188-532CB5E4A106-low.png Figure 2-2 TPS25983 Output Rise Profile (VIN = 12 V, CdVdT = 10 nF, COUT = 2 mF, No-load)