TIDUF59 March   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 PFC Inductance Design
      2. 2.2.2 Configuration of CS pin in LMG3622
      3. 2.2.3 AHB Topology and the VCC Design
      4. 2.2.4 LMG2610 for AHB Topology
    3. 2.3 Highlighted Products
      1. 2.3.1 UCC28056
      2. 2.3.2 LMG3622
      3. 2.3.3 LMG2610
  9. 3Hardware, Test Requirements, and Test Results
    1. 3.1 Hardware
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Switching Waveform
        1. 3.3.1.1 Switching Waveform on the PFC Stage
        2. 3.3.1.2 Switching Waveform on the AHB Stage
      2. 3.3.2 Efficiency Test Result
      3. 3.3.3 Thermal Test Result
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 Layout Prints {Optional Section}
    2. 4.2 Tools
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author

Features

  • Wide output power range from 5V to 28V for USB PD3.1 application
  • PFC is designed using a TI 120mΩ single GaN with driver integrated and UCC28056 TM PFC controller
  • AHB is designed with the TI half-bridge GaN as a 170mΩ, 248mΩ GaN device with driver, level shift, and integrated bootstrap diode
  • > 94% efficiency at 115VAC input and > 95.5% efficiency at 230VAC input
  • High power density design: 27.33W/in3 with PCB size: 50mm × 73mm × 23mm
  • PFC is turned off at 5V and 9V output
  • System feedback is designed using TL431. The output voltage (5V, 9V, 15V, 20V, and 28V) is set by the jumper