SNVU852A September   2023  – March 2024

 

  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
    1. 2.1 Connector, Test Point, and Selection Switch Descriptions
      1. 2.1.1 Connector Descriptions
      2. 2.1.2 Jumper Descriptions
      3. 2.1.3 Test Point Descriptions
      4. 2.1.4 Selection Switch Descriptions
        1. 2.1.4.1 S1 and S2 CFG Setting
      5. 2.1.5 I2C Operation
  9. 3Implementation Results
    1. 3.1 Test Setup and Procedure
      1. 3.1.1 Test Setup
      2. 3.1.2 Test Procedure
      3. 3.1.3 Precautions
    2. 3.2 Test Data and Performance Curves
      1. 3.2.1 Thermal Performance
      2. 3.2.2 Efficiency
      3. 3.2.3 Steady State Waveforms
      4. 3.2.4 Step Load Response
      5. 3.2.5 AC Loop Response Curve
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6Revision History

1.1 Introduction

The LM51772EVM-HP evaluation module (EVM) is designed to conveniently evaluate the performance of the LM51772 Wide-VIN Buck-Boost Controller. The EVM is set up for a wide input voltage range from 9V to 48V and provides a default output voltage of 20V. The EVM operates with a switching frequency of 600kHz. Most settings of the device can be easily adjusted or set through jumpers, such as:

  • Operation mode (PSM or fPWM)
  • Bias supply
  • External clock synchronization

Through the optional usage of the I2C interface, the device covers additional parameters for configuration and adjustments of the switch mode power supply operation.

To check the performance, the I2C interface also gives an easy access to measure the typical signals of a Buck-Boost controller.