SNVU628 February   2020 LM5155 , LM5155-Q1 , LM51551 , LM51551-Q1

 

  1.   LM5155EVM-SEPIC User's Guide
    1.     Trademarks
    2. 1 Features and Electrical Performance
      1. 1.1 Electrical Parameters
      2. 1.2 EVM Power Derating Curve
      3. 1.3 Terminals and Signal Test Points
    3. 2 Application Schematic
    4. 3 EVM Picture
    5. 4 Test Setup and Procedure
      1. 4.1 Bench Setup
      2. 4.2 Test Equipment
      3. 4.3 Precautions
    6. 5 Test Data
      1. 5.1 Efficiency
      2. 5.2 Output Regulation
      3. 5.3 Typical Power Up
      4. 5.4 Output Ripple Voltage
      5. 5.5 Coupled Inductor Currents
      6. 5.6 Dynamic DIR Change
      7. 5.7 Step Load Response
      8. 5.8 Bode Plots
      9. 5.9 Overloading Hiccup Mode
    7. 6 Design Files
      1. 6.1 Schematics
      2. 6.2 Bill of Materials
      3. 6.3 Board Layout

LM5155EVM-SEPIC User's Guide

The LM5155EVM-SEPIC Evaluation Module (EVM) is designed to showcase the LM5155 wide input voltage Boost/SEPIC/Boost controller, implementing a SEPIC converter with a coupled inductor. The EVM operates at 2.2 MHz, and it produces a regulated output of 12 V 24 W from an input of 5 V to 42 V. When the input voltage is between 3 V to 5 V, the output power is derated down to 10 W. The factory-installed controller is the LM5155-Q1. However, by replacing the IC, the EVM can also be used to demonstrate the performance of the LM51551-Q1, LM5155 and LM51551. The difference between the LM5155-Q1 and LM51551-Q1, or between the LM5155 and LM51551, is that the latter features the hiccup mode for overload protection.