SNVU843B April   2023  – June 2025

 

  1.   1
  2.   LM5171 Evaluation Module
  3.   Trademarks
  4. 1Features and Electrical Performance
  5. 2Setup
    1. 2.1 EVM Configurations
    2. 2.2 Bench Setup
    3. 2.3 Test Equipment
    4. 2.4 Jumper Settings for Typical Operation Modes
      1. 2.4.1 Buck Mode with Voltage Regulation
      2. 2.4.2 Boost Mode with Voltage Regulation
      3. 2.4.3 Buck Mode with Current Regulation
      4. 2.4.4 Boost Mode with Current Regulation
      5. 2.4.5 Single Phase Operation
      6. 2.4.6 2-EVM Daisy-Chain for 3 or 4-Phase Operation
  6. 3Test Procedure
    1. 3.1 Buck Mode Power-Up and Power-Down Sequence
    2. 3.2 Boost Mode Power-Up and Power-Down Sequence
    3. 3.3 Bidirectional Operation Power-Up and Power-Down Sequence
    4. 3.4 Operating the EVM With External MCU or Other Digital Circuit
    5. 3.5 How to Adjust the Output Voltage
  7. 4Test Data
    1. 4.1 Efficiency and Thermal Performance
    2. 4.2 Step Load Response
    3. 4.3 Dual-Channel Interleaving Operation
    4. 4.4 Typical Start Up and Shutdown
    5. 4.5 DEM and FPWM
    6. 4.6 Mode Transition Between DEM and FPWM
    7. 4.7 ISET Tracking and Pre-Charge
    8. 4.8 Pre-charge
    9. 4.9 Protections
  8. 5Design Files
    1. 5.1 Schematics
    2. 5.2 Bill of Materials
    3. 5.3 Board Layout
  9. 6Revision History

3.1 Buck Mode Power-Up and Power-Down Sequence

For Buck Mode with Voltage Regulation,

  1. Refer to Buck Mode with Voltage Regulation for proper jumper settings.
  2. Set LV-E-Load to CC mode. Turn on the HV-PS power supply and LV-E-Load.
  3. Perform the test.
  4. After the tests are done, turn off the HV-PS and LV-E-Load.

For Buck Mode with Current Regulation,

  1. Refer to Buck Mode with Current Regulation for proper jumper settings.
  2. Set LV-E-Load to CV mode. Turn on the HV-PS power supply and LV-E-Load.
  3. Apply an analog voltage gradually rising from 1V to 2.2V at J17-pin 11 or J18-pin 11 (ISETA), or a PWM signal at J17-pin 13 or J18-pin 13.
  4. Perform the test.
  5. After the tests are done, set ISETA to 1V, and turn off the HV-PS and LV-E-Load.