SLVUCY3 October   2024 LM65680-Q1

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Test Setup and Procedure
      1. 2.1.1 EVM Connections
      2. 2.1.2 Test Equipment
      3. 2.1.3 Recommended Test Setup
        1. 2.1.3.1 Input Connections
        2. 2.1.3.2 Output Connections
      4. 2.1.4 Test Procedure
        1. 2.1.4.1 Line, Load Regulation, and Efficiency
  8. 3Implementation Results
    1. 3.1 Performance Data and Results
      1. 3.1.1 EVM Characteristics
      2. 3.1.2 Conversion Efficiency
      3. 3.1.3 Operating Waveforms
        1. 3.1.3.1 Switching
        2. 3.1.3.2 Load Transient Response
        3. 3.1.3.3 Short-Circuit Recovery
        4. 3.1.3.4 Start-Up and Shutdown With EN
        5. 3.1.3.5 Start-Up With VIN
      4. 3.1.4 Bode Plot
      5. 3.1.5 CISPR 25 EMI Performance
      6. 3.1.6 Thermal Performance
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
      1. 4.2.1 Component Drawings
      2. 4.2.2 Multi-Layer Stackup
    3. 4.3 Bill of Materials
  10. 5Compliance Information
    1. 5.1 Compliance and Certifications
  11. 6Related Documentation
    1. 6.1 Supplemental Content
      1. 6.1.1 Development Support
      2. 6.1.2 PCB Layout Resources
      3. 6.1.3 Thermal Design Resources
  12. 7Additional Information
    1. 7.1 Trademarks

2.1.4.1 Line, Load Regulation, and Efficiency

  • Set up the EVM as described in EVM Connections.
  • Set load to constant resistance or constant current mode to sink 0A.
  • Increase the input source voltage from 0V to 70V; use voltmeter 1 to measure the input voltage.
  • Increase the current limit of the input supply to 8A.
  • Use voltmeter 2 to measure the output voltage, VOUT, and vary the load current from 0A to 8A DC; VOUT must remain within the load regulation specification.
  • Set the load current to 4A (50% rated load) and vary the input source voltage from 6V to 70V; VOUT must remain within the line regulation specification.
  • Set the load current to 8A (100% rated load) and measure the efficiency at typical input voltages (12V, 24V, 36V, 48V and 65V).
  • Decrease the load to 0A. Decrease the input source voltage to 0V.
CAUTION:

Extended operation at high output current can raise component and EVM board temperatures above 55°C. To avoid risk of a burn injury, do not touch the components and the EVM board until cooled sufficiently after disconnecting power.