SNVU797C April   2022  – October 2024 LM5177

 

  1.   1
  2.   LM5177 Wide-VIN Buck-Boost Controller EVM
  3.   Trademarks
  4. 1Features
  5. 2Connector, Test Point, and Selection Switch Descriptions
    1. 2.1 Connector Descriptions
    2. 2.2 Jumper Descriptions
    3. 2.3 Test Point Descriptions
    4. 2.4 Selection Switch Descriptions
      1. 2.4.1 S1 and S2 CFG setting
  6. 3Test Setup and Procedure
    1. 3.1 Test Setup
    2. 3.2 Test Procedure
    3. 3.3 Precautions
  7. 4Test Data and Performance Curves
    1. 4.1 Thermal Performance
    2. 4.2 Efficiency
    3. 4.3 Steady State Waveforms
    4. 4.4 Step Load Response
  8. 5Schematic
  9. 6Optional Components
  10. 7Board Layout
  11. 8Bill of Materials
  12. 9Revision History

Test Procedure

  1. Set the power supply current limit to 10 A. Turn off the power supply. Connect the positive output of the power supply to J1 and the negative output to J3.
  2. Connect the load to J2 for the positive connection and J4 for the negative connection.
  3. Set the power supply voltage to 16 V and the electronic load to 0.1 A. The electronic load voltage must be in regulation with a nominal 16-V output.
  4. Slowly increase the load while monitoring the output voltage between J6-VCC and J6-GND. The output voltage must remain in regulation with a nominal 16-V output as the load is increased up to 9.4 A.
  5. Slowly sweep the input voltage from 16 V to 36 V. The output voltage must remain in regulation with a nominal 16-V output.
  6. Decrease the load to 2.5 A.
  7. Slowly sweep the input voltage from 36 V to 5 V. The output voltage must remain in regulation with a nominal 16-V output.
  8. Decrease the input voltage down to 0 V to shut down the buck-boost converter, and then turn off the load.