SNVU935 March   2025 LM251772

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware Connector, Test Point, and Selection Switch Descriptions
    1. 2.1 Connector Descriptions
    2. 2.2 Jumper Descriptions
    3. 2.3 Test Point Descriptions
  9. 3Implementation Results
    1. 3.1 Test Setup
    2. 3.2 Test Procedure
    3. 3.3 Precautions
    4. 3.4 Test Data and Performance Curves
      1. 3.4.1 Thermal Performance
      2. 3.4.2 Efficiency
      3. 3.4.3 Steady State Waveforms
      4. 3.4.4 Step Load Response
      5. 3.4.5 AC Loop Response Curves
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 Board Layout
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1.     Trademarks

3.2 Test Procedure

  1. Set the power supply current limit to 15 A.
  2. Turn off the power supply.
  3. Connect the positive output of the power supply to J2 and the negative output to J6.
  4. Connect the load to J1 for the positive connection and J5 for the negative connection.
  5. Set the power supply voltage to 8V and the electronic load to 0.1 A. Make sure the electronic load voltage is in regulation with a nominal 5V output.
  6. Slowly increase the load while monitoring the output voltage between J4-VOUT and J4-GND. The output voltage must remain in regulation with a nominal 4V output as the load is increased up to 3A.
  7. Slowly sweep the input voltage from 8V to 36V. The output voltage must remain in regulation with a nominal 5V output.

  8. Set the output voltage to 48V via I2C and GUI

  9. Increase the load to 5A.
  10. Slowly sweep the input voltage from 36V to 20V. Make sure the output voltage remains in regulation with a nominal 48V output.
  11. Decrease the input voltage down to 0V to shut down the buck-boost converter, and then turn off the load.