SLVUCH7A september   2022  – june 2023 TPS25990

 

  1.   1
  2.   TPS25990EVM: Evaluation Module for TPS25990 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 and Setup
      1. 4.2.1 Power supplies
      2. 4.2.2 Meters
      3. 4.2.3 Oscilloscope
      4. 4.2.4 USB-to-GPIO Interface Adapter
      5. 4.2.5 Loads
  8. 5Test Setup and Procedures
    1. 5.1  Hot Plug
    2. 5.2  Start-up with Enable
    3. 5.3  Current Limit Based Start-up Behavior
    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 TPS25990EVM
  9. 6Using the TPS25990EVM-GUI
    1. 6.1 Access the TPS25990EVM-GUI
    2. 6.2 Introduction to the TPS25990EVM-GUI
    3. 6.3 Establishing Communication Between the EVM and GUI
    4. 6.4 Quick Info
    5. 6.5 Configuration
    6. 6.6 Telemetry
    7. 6.7 Blackbox
    8. 6.8 Register Map Page
  10. 7EVAL Board Assembly Drawings and Layout Guidelines
    1. 7.1 PCB Drawings
  11. 8Bill Of Materials (BOM)
  12. 9Revision 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 (QOD is disabled).
  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 (QOD is enabled).
  4. Observe the waveforms of VIN (TP3), VOUT (TP4), PG (TP21), and EN (TP22) using an oscilloscope.

In Figure 5-16, the turn-off performance of the TPS25990 eFuse with QOD enabled is shown, whereas Figure 5-17 illustrates the turn-off performance with QOD disabled on the TPS25990EVM.

GUID-9E05B515-9AB4-466E-AF5A-C92D72C70C75-low.svgFigure 5-16 QOD Enabled on TPS25990 eFuse (VIN = 12 V, COUT = 470 µF, and EN Pulled Low to 0.8 V)
GUID-C3E61C1A-15CC-4CF5-8E07-7FC9CAC5C713-low.svgFigure 5-17 QOD Disabled on TPS25990 eFuse (VIN = 12 V, COUT = 470 µF, and EN Pulled Low to 0 V)