SNVU936 July   2025

 

  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 Setup
    2. 2.2 Header Information
    3. 2.3 Test Points
    4. 2.4 Assembly Instructions
    5.     General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  9. 3Implementation Results
    1. 3.1 Performance Data and Results
      1. 3.1.1 Conversion Efficiency
      2. 3.1.2 Output Voltage Regulation
      3. 3.1.3 Operating Waveforms
        1. 3.1.3.1 Start-Up
        2. 3.1.3.2 Switching
    2. 3.2 Thermal Performance
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials (BOM)
  11. 5Compliance Information
    1. 5.1 Compliance and Certifications
  12. 6Additional Information
    1. 6.1 Trademarks

1.1 Introduction

The LMR71915 Fly-Buck converter evaluation module (EVM), also known as LMR71915EVM-FLBK, is configured to deliver a regulated 12V output, with 0.625A at 500kHz switching frequency, and an additional 12V floating output also capable of 0.625A. The LMR71915 uses a COT control architecture, with input voltage feedforward to provide a constant frequency regulator with tightly regulated output voltage. This type of control requires adequate voltage ripple at the FB input to achieve stable regulation. The LMR71915EVM-FLBK is set up with type III ripple injection to minimize the output voltage ripple while making sure there is a stable regulator. The LMR71915EVM-FLBK also provides the option to use type I or type II ripple injection. See also LMR719xx 1.5A, 0.75A, 115V, Step-Down Converter With Fly-Buck™ Converter Capability data sheet for more information.

This user's guide describes the characteristics and operation of the EVM. This user's guide also provides examples and instructions on how to use the EVM, and presents typical performance curves and key waveforms. Throughout this document, the terms of evaluation board, evaluation module, and EVM are synonymous with the LMR71915EVM-FLBK. This document also includes the schematic, reference printed circuit board (PCB) layout, and the bill of materials (BOM).