SLVUCH6A July   2023  – November 2023 TPS25984

 

  1.   1
  2.   TPS25984EVM: Evaluation Module for TPS25984 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  Provision to Apply Load Transient and Overcurrent Event Using an Onboard Switching Circuit
    9. 5.9  Output Hot Short
    10. 5.10 Quick Output Discharge (QOD)
    11. 5.11 Thermal Performance of TPS25984EVM
  9. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  10. 7Bill of Materials (BOM)
  11. 8Revision History

5.10 Quick Output Discharge (QOD)

Use the following instructions to observe the Quick Output Discharge (QOD) functionality:

  1. Set the input supply voltage VIN to 12 V and current limit to 10 A. Turn ON the power supply.
  2. Use the switch SW1 to connect the EN/UVLO pin to ground to do power cycling.
  3. Use the switch SW2 to enable the QOD by making the voltage at EN/UVLO pin in the range of 0.8 V–1.1 V with the input voltage of 9.8 V–13.5 V.
  4. Observe the waveforms of VIN (TP5), VOUT (TP6), PG (TP20), and EN (TP22) using an oscilloscope.

In Figure 5-18, the turn-off performance of the TPS25984 eFuse with QOD enabled is shown, whereas Figure 5-19 illustrates the turn-off performance with QOD disabled on the TPS25984EVM eFuse evaluation board.

GUID-C70EC40F-A2BD-4729-9754-ED6B5FE367DB-low.svg
VIN = 12 V, COUT = 470 µF, and EN Pulled Low to 0.8 V
Figure 5-18 QOD Enabled on TPS25984 eFuse
GUID-EE7A3053-118B-4ACF-8609-4B876D08D8F8-low.svg
VIN = 12 V, COUT = 470 µF, and EN Pulled Low to 0 V
Figure 5-19 QOD Disabled on TPS25984 eFuse