TIDT309 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 Board Dimensions
    4. 1.4 Test Setup
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Load Regulation and Cross Regulation
    4. 2.4 Regulation Test Data
    5. 2.5 Thermal Images
  6. 3Waveforms
    1. 3.1 Switching

Description

This reference design demonstrates ultra-compact isolated bias power, which can be used for the half-bridge of TI GaN. The design uses the UCC25800 to generate two isolated 12-V power supplies for the two FETs of the half-bridge, and converts the single 12-V DC into two 12-V DC lines with isolation. The UCC25800 features a 1-MHz switching ability, LLC resonant topology, and an ultra-compact transformer (4.5 mm × 3.2 mm × 3.5 mm). Using these features of the device, 1.2 W of power with relatively high efficiency can be delivered to the reference design.