TIDUF59
March 2024
1
Description
Resources
Features
Applications
6
1
System Description
1.1
Key System Specifications
2
System Overview
2.1
Block Diagram
2.2
Design Considerations
2.2.1
PFC Inductance Design
2.2.2
Configuration of CS pin in LMG3622
2.2.3
AHB Topology and the VCC Design
2.2.4
LMG2610 for AHB Topology
2.3
Highlighted Products
2.3.1
UCC28056
2.3.2
LMG3622
2.3.3
LMG2610
3
Hardware, Test Requirements, and Test Results
3.1
Hardware
3.2
Test Setup
3.3
Test Results
3.3.1
Switching Waveform
3.3.1.1
Switching Waveform on the PFC Stage
3.3.1.2
Switching Waveform on the AHB Stage
3.3.2
Efficiency Test Result
3.3.3
Thermal Test Result
4
Design and Documentation Support
4.1
Design Files
4.1.1
Schematics
4.1.2
BOM
4.1.3
Layout Prints {Optional Section}
4.2
Tools
4.3
Documentation Support
4.4
Support Resources
4.5
Trademarks
5
About 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 115V
AC
input and > 95.5% efficiency at 230V
AC
input
High power density design: 27.33W/in
3
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