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

3.4.1 Thermal Performance

LM251772 Thermal Image: VIN = 12.0V, VOUT = 5.0V, IOUT = 5.0A, No Forced Air CoolingFigure 3-2 Thermal Image: VIN = 12.0V, VOUT = 5.0V, IOUT = 5.0A, No Forced Air Cooling
LM251772 Thermal Image: VIN = 12.0V, VOUT = 28.0V, IOUT = 5.0A, No Forced Air CoolingFigure 3-3 Thermal Image: VIN = 12.0V, VOUT = 28.0V, IOUT = 5.0A, No Forced Air Cooling
LM251772 Thermal Image: VIN = 20.0V, VOUT = 5.0V, IOUT = 5.0A, No Forced Air CoolingFigure 3-4 Thermal Image: VIN = 20.0V, VOUT = 5.0V, IOUT = 5.0A, No Forced Air Cooling
LM251772 Thermal Image: VIN = 20.0V, VOUT = 12.0V, IOUT = 5.0A, No Forced Air CoolingFigure 3-5 Thermal Image: VIN = 20.0V, VOUT = 12.0V, IOUT = 5.0A, No Forced Air Cooling
LM251772 Thermal Image: VIN = 20.0V, VOUT = 20.0V, IOUT = 5.0A, No Forced Air CoolingFigure 3-6 Thermal Image: VIN = 20.0V, VOUT = 20.0V, IOUT = 5.0A, No Forced Air Cooling
LM251772 Thermal Image: VIN = 20.0V, VOUT = 48.0V, IOUT = 5.0A, No Forced Air CoolingFigure 3-7 Thermal Image: VIN = 20.0V, VOUT = 48.0V, IOUT = 5.0A, No Forced Air Cooling
LM251772 Thermal Image: VIN = 20.0V, ILIM (Current Limiter) = 5.0A, Load = Short, No Forced Air CoolingFigure 3-8 Thermal Image: VIN = 20.0V, ILIM (Current Limiter) = 5.0A, Load = Short, No Forced Air Cooling