SLVUD40 November   2024 TPS25984B

 

  1.   1
  2.   TPS25984BEVM: Evaluation Module for TPS25984B 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
      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
    2. 5.2  Start-Up With Enable
    3. 5.3  Difference Between Current Limit and DVDT Based Start-Up Mechanisms
    4. 5.4  Power Up Into Short
    5. 5.5  Overvoltage Lockout
    6. 5.6  Transient Overload Performance
    7. 5.7  Overcurrent Event
    8. 5.8  Output Hot Short
    9. 5.9  Quick Output Discharge (QOD)
    10. 5.10 Thermal Performance of TPS25984BEVM
  9. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  10. 7Bill of Materials (BOM)

5.1 Hot Plug

Use the following instructions to measure the inrush current during hot plug event:

  1. Configure the jumper J2 position to the desired slew rate mentioned in Table 4-3.
  2. Configure the jumpers J5 and J7 positions to the desired current limits as mentioned in Table 4-3.
  3. Configure the jumper J6 position to desired reference voltage for overcurrent protection as specified in Table 4-3.
  4. Connect a load of 1.2Ω between VOUT (Connector T2) and PGND (Connector T3).
  5. Connect the negative terminal of the power supply to connector T3.
  6. Set the input supply voltage VIN to 12V and current limit to 100A. Enable the power supply.
  7. Hot plug the positive terminal of the power supply at connector T1.
  8. Observe the waveforms at VOUT (TP6) and input current using an oscilloscope to measure the slew rate and rise time of the VOUT with a given input voltage of 12V.

Figure 5-2 and Figure 5-3 show the examples of inrush current captured on the TPS25984BEVM eFuse evaluation board with two (2) devices in parallel during the hot plug event.

TPS25984BEVM TPS25984B eFuse Hot Plug Profile-1
VIN stepped up from 0V to 12V, COUT = 18.47mF, CDVDT = 43nF, and RLOAD = 1.2Ω
Figure 5-2 TPS25984B eFuse Hot Plug Profile-1
TPS25984BEVM TPS25984B eFuse Hot Plug Profile-2
VIN stepped up from 0V to 12V, COUT = 18.47mF, CDVDT = 43nF, and RLOAD = 0.37Ω
Figure 5-3 TPS25984B eFuse Hot Plug Profile-2