Design of a 330 W 700 kHz half-bridge LLC resonant converter
Abstract
In order to meet the demands for high efficiency and miniaturization in notebook power adapters, this paper designs a 330 W 700 kHz half-bridge LLC resonant converter based on GaN power devices. By analysing the operational principles and driving characteristics of the LLC converter, the Fundamental Harmonic Analysis (FHA) method is adopted to analyse the converter's gain and establish its model. Based on this model, the key parameters of the LLC converter are designed, including the transformer turns ratio, resonant tank parameters, and dead time. Finally, simulations are utilized to verify the rationality of the converter design, and a prototype is built for experimental validation.
Fields of Study & Subjects
Advanced DC-DC Converters
Induction Heating and Inverter Technology
Advanced Power Amplifier Design
Publication details
- Journal / source
- IET conference proceedings.
- Publisher
- Institution of Engineering and Technology (IET)
- Volume
- 2025
- Issue
- 42
- Pages
- 133–138
- Publication date
- 1 January 2026
- Language
- EN