SLVT255 July   2026

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Safety Warning
    3. 1.3 Dimensions
    4. 1.4 Test Setup
  8. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  9. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Start-Up Sequence
    4. 3.4 Dynamic Response
  10.   Trademarks

Description

This reference design demonstrates a half-bridge LLC converter with an input voltage range from 450V to 800 (950V) by using the UCC256612. The design implements HV start-up and isolated gate driver, UCC5350 for 800 (950V) operation. The design replaces the optocoupler with an opto-emulator ISOM8110 to mitigate the signal degradation by current transfer ratio (CTR) over time. The design is an excellent choice for automotive μDC-DC and data center AUX applications.