SNVU820 February   2022 LM5149-Q1

 

  1.   Trademarks
  2. 1High Density EVM Description
    1. 1.1 Typical Applications
    2. 1.2 Features and Electrical Performance
  3. 2EVM Characteristics
  4. 3Application Circuit Diagram
  5. 4EVM Photo
  6. 5Test Setup and Procedure
    1. 5.1 EVM Connections
    2. 5.2 Test Equipment
    3. 5.3 Recommended Test Setup
      1. 5.3.1 Input Connections
      2. 5.3.2 Output Connections
    4. 5.4 Test Procedure
      1. 5.4.1 Line and Load Regulation, Efficiency
  7. 6Test Data and Performance Curves
    1. 6.1 Conversion Efficiency
    2. 6.2 Operating Waveforms
      1. 6.2.1 Switching
      2. 6.2.2 Load Transient Response
      3. 6.2.3 Line Transient Response
      4. 6.2.4 Start-Up and Shutdown With EN
      5. 6.2.5 Start-Up and Shutdown with VIN
    3. 6.3 Bode Plot
    4. 6.4 CISPR 25 EMI Performance
    5. 6.5 Thermal Performance
  8. 7EVM Documentation
    1. 7.1 Schematic
    2. 7.2 List of Materials
    3. 7.3 PCB Layout
    4. 7.4 Component Drawings
  9. 8Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
        1. 8.2.1.1 PCB Layout Resources
        2. 8.2.1.2 Thermal Design Resources

5.4.1 Line and Load Regulation, Efficiency

  1. Set up the EVM as previously described.
  2. Set the load to constant resistance or constant current mode and to sink 0 A.
  3. Increase input source from 0 V to 48 V; use voltmeter 1 to measure the input voltage.
  4. Increase the current limit of the input supply to 12 A.
  5. Using voltmeter 2 to measure the output voltage, VOUT, vary the load current from 0 A to 8 ADC; VOUT must remain within the load regulation specification.
  6. Set the load current to 4 A (50% rated load) and vary the input source voltage from 15 V to 72 V; VOUT must remain within the line regulation specification.
  7. Decrease load to 0 A. Decrease input source voltage to 0 V.