TIDT294 June   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Dimensions
  5. 2Test Results
    1. 2.1 Efficiency Graphs
    2. 2.2 THD
    3. 2.3 Data
    4. 2.4 Thermal Performance
  6. 3Waveforms
    1. 3.1 Switching Waveforms

Description

This reference design is a high-density and high-efficiency, 5-kW power factor correction (PFC) converter implemented with TI's high-performance GaN power switches. A peak system efficiency of 99% with an open-frame power density of 120 W/in3 was measured. The power stage uses a two-phase totem pole PFC in a brand new topology and control mechanism. The new control method operates with variable frequency and maintains zero voltage switching (ZVS) over all operating conditions. The control is implemented with a TMS320F280049C high-performance microcontroller. The operating frequency range of the converter is approximately between 100 kHz and 800 kHz.