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

Abstract

The LM5171EVM-BIDIR Evaluation Module (EVM) is designed to showcase the LM5171 high performance dual-channel bidirectional controller, which is an excellent choice for, but not limited to, the automotive 48V to 12V dual battery system applications.

The EVM can be configured as a bidirectional power converter in the form of either a current source or voltage source. The direction of power flow can be controlled either by an external command signal or by the on-board jumper. Through the onboard interface headers, the EVM can be operated by a DSP, an FPGA, an MCU, or other digital controllers. Two EVMs can be paralleled to make a 3 or 4 phases interleaved converter for higher power. More EVMs can be paralleled for greater number of phases. Many convenient jumper headers are also included for versatile configurations of the EVM.

Refer to the LM5171 Multiphase Bidirectional Current Controller Data Sheet (SNVSCM3) for detailed technical information of the LM5171 device.

CAUTION:
LM5171-Q1
Read the user's guide before use.
CAUTION:
LM5171-Q1
Hot surface! Contact can cause burns. Do not touch!