3KW High Efficiency LLC Reference Design

A high density, high efficiency GaN-based 3kW LLC Resonant Converter to reduce design cycles, costs and time to market for data center, telecom, and industrial switching mode power supply (SMPS) applications. This full-bridge LLC resonant converter exceeds the 80+ Titanium standard for power supply units, achieving high power density (PFC+DC/DC) above 100W/inch3 and high efficiency of more than 96%.

Description and Specifications:

  • Input Voltage range: 380 Vdc~420 Vdc
  • Output Voltage: 54 V
  • Full Load Current: 55 A
  • Topology: Full Bridge LLC Resonant Converter with Synchronize Rectification
  • Target frequency: 250 KHz (resonant frequency)
  • Max Frequency: 450 KHz
  • PCBA board size: 80mm x 140mm x 30mm (including air-forced cooling)