TIDT306 October   2022


  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Test Setup
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs of PFC Stage
    2. 2.2 Efficiency Data of PFC Stage
    3. 2.3 Efficiency Graphs of LLC Stage
    4. 2.4 Efficiency Data of LLC Stage
    5. 2.5 Thermal Images
  6. 3Waveforms
    1. 3.1 Steady State
    2. 3.2 Switching
    3. 3.3 Load Transients


This reference design is a digitally controlled, compact 1.6-kW AC/DC power supply design for server power supply unit (PSU) and telecom rectifier applications. The highly-efficient design supports two main power stages, including a front-end continuous conduction mode (CCM) totem-pole bridgeless power factor correction (PFC) stage. The PFC stage features TI’s LMG341x GaN FET with integrated driver to provide enhanced efficiency across a wide load range. The design also supports a half-bridge LLC isolated DC/DC stage using LMG342x GaN FET to achieve a +12-V DC output at 1.6 kW. Two control cards use C2000™ Piccolo™ microcontrollers to control both power stages