TIDUFF3 October   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
      1. 1.1.1 General TI High Voltage Evaluation User Safety Guidelines
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 GaN Power Stage
      2. 2.2.2 Inductor
      3. 2.2.3 Controller
      4. 2.2.4 Heat Sink
    3. 2.3 Highlighted Products
      1. 2.3.1 LMG3100R017
      2. 2.3.2 UCD3138A
      3. 2.3.3 TPSM365R6V5
      4. 2.3.4 TMP61
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Software Requirements
    3. 3.3 Test Setup
    4. 3.4 Test Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author

3.4 Test Results

The following test results show that for a 12V output, peak efficiency is approximately 98.05% at 480W output power and a 40V input voltage. Peak efficiency for a 48V input is 97.78% at mid load, and 96.82% at full load. These efficiency measurements include all bias supply requirements but exclude the output pin connector power loss.

TIDA-050089 Efficiency at 40V VINFigure 3-3 Efficiency at 40V VIN
TIDA-050089 Efficiency at 48V VINFigure 3-4 Efficiency at 48V VIN
TIDA-050089 Efficiency at 54V VINFigure 3-5 Efficiency at 54V VIN
TIDA-050089 Efficiency at 60V VINFigure 3-6 Efficiency at 60V VIN
TIDA-050089 Thermal Capture (48V–12V, 1.1kW, 25°C Ambient, 29.5 Cubic Feet per Minute Airflow)Figure 3-7 Thermal Capture (48V–12V, 1.1kW, 25°C Ambient, 29.5 Cubic Feet per Minute Airflow)