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)

5.2 Start-Up With Enable

Use the following instructions to power up the TPS25984B eFuse with ENABLE:

  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 mentioned in Table 4-3.
  4. Set the input supply voltage VIN to 12V and current limit to 100A.
  5. Connect a load of 1.2Ω between VOUT (Connector T2) and PGND (Connector T3).
  6. Connect the input supply between VIN (Connector T1) and PGND (Connector T3).
  7. Turn on the power supply by keeping the device disabled using the switch SW1.
  8. Enable the eFuses by releasing the switch SW1.
  9. Observe the waveform 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 5-4 and Figure 5-5 show the start-up profile of TPS25984B eFuse with ENABLE using two (2) devices in parallel.

TPS25984BEVM TPS25984B eFuse Start-Up Profile With ENABLE
VIN = 12V, EN stepped up from 0V to 3V, COUT = 18.47mF, RLOAD = 1.2Ω, and CDVDT = 43nF
Figure 5-4 TPS25984B eFuse Start-Up Profile With ENABLE
TPS25984BEVM Start-Up Profile With ENABLE: Current Sharing Between Two (2) TPS25984B eFuses
VIN = 12V, EN stepped up from 0V to 3V, RILIM = 1.65kΩ, RLIMI2 = 1.65kΩ, RIREF = 50kΩ, COUT = 25.27mF, RLOAD = 0.5Ω, and CDVDT = 27nF
Figure 5-5 Start-Up Profile With ENABLE: Current Sharing Between Two (2) TPS25984B eFuses