TIDT228 October   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Specifications
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Dimensions
  5. 2Testing and Results
    1. 2.1 Standby Power Consumption
    2. 2.2 Efficiency Graphs
    3. 2.3 Thermal Images
    4. 2.4 Bode Plots
    5. 2.5 Conducted EMI
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-Up

Description

This reference design is a high-density 60-W, 115-VAC input power supply for USB Type-C® applications. The typical application is a single-stage, USB Type-C charger that can support two ports which simultaneously provide the same output voltage. The maximum power rating is 60 W at 20-V or 15-V output, 54 W at 9-V output, and 30 W at 5-V output. This power supply is designed to minimize power loss at all output voltage configurations. The LMG2610 GaN half-bridge simplifies the power stage with the included integrated gate drivers, current sense emulation, and high-side level shifter. These integrated features eliminate the need for external gate-drive circuitry, current-sense transformer (and associated losses), and high-side isolator. The UCC28782 active clamp flyback controller and UCC24612 synchronous rectifier driver allow this design to achieve a peak efficiency of 94.8% within the compact dimensions of 1.5 in × 3.35 in × 1 in (37.5 mm × 85 mm × 25 mm) and minimize temperature rise.