SDAA490A September   2026  – October 2026 UCC25661

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Full-Bridge LLC Operating Principle
  6. 3Implementation With UCC25661x
    1. 3.1 Gate Drive Architecture
    2. 3.2 ISNS Circuit Modification
    3. 3.3 Auxiliary Logic Implementation
    4. 3.4 Logic Level Signal Translation
  7. 4Hardware Results
  8. 5Summary
  9. 6References
  10. 7Revision History

Abstract

This application note describes the implementation of a full-bridge LLC resonant converter based on the UCC25661x LLC controller. Since the controller is primarily intended for half-bridge applications, additional circuitry is employed to generate the required gate-drive signals and necessary features for full-bridge operation.