Sizing Compact Transformers with Integrated Series Inductance Suitable for a 1 MHz DC/DC LLC Converter
Conference: PCIM Europe 2022 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/10/2022 - 05/12/2022 at Nürnberg, Germany
doi:10.30420/565822055
Proceedings: PCIM Europe 2022
Pages: 6Language: englishTyp: PDF
Authors:
Soupremanien, Ulrich; Bohnke, Marc; Delette, Gerard (Univ. Grenoble Alpes, CEA LITEN, Grenoble, France)
Demumieux, Pierre (CEA, CEA Tech Occitanie, Labege, France)
Perichon, Pierre (Univ. Grenoble Alpes, CEA LETI, Grenoble, France)
Marek-Favarel, Samuel (Capgemini Engineering, Altran TEC, Blagnac, France)
Sutto, Thierry (EXAGAN, STMicroelectronics, Labege, France)
Abstract:
A high frequency (1MHz) LLC DC/DC power converter using Gallium Nitride High Electron Mobility Tran-sistors (GaN HEMT) has been designed and prototyped. The objective was to reduce the footprint of the device as well as to optimize the efficiency of this converter devoted to large markets, such as power supplies for datacenters. In this study, we paid a specific attention to the downsizing of the magnetic passive components via the integration of the series inductor into the magnetic core without any detri-mental effect on volume and efficiency. This transformer has been modelled, then fabricated and finally integrated into the converter. The experimental results highlight the performance of this transformer in comparison with a commercial solution for which a discrete inductive component was implemented. For the two solutions the DC/DC converter efficiencies were similar (η>95%).