High-Efficiency GaN-Based Synchronous Buck Converters for 48V to 1V Direct Conversion in Automotive Applications

This paper explores the design considerations and topologies for a 48V to 1V direct voltage conversion in automotive applications, focusing on Gallium Nitride (GaN) technology and a high switching frequency of 2MHz. Various converter topologies are compared, and the advantages of using GaN technology in high-frequency Synchronous Buck Converters are highlighted. This research outlines design guidelines, identifies challenges, and proposes potential solutions to attain high efficiency, compact size, and adherence to automotive Electromagnetic Compatibility (EMC) standards. Efficiency optimization is highlighted as a critical factor in minimizing power losses and extending battery life within automotive contexts. The paper further discusses the pivotal role of selecting an appropriate converter topology and control scheme in achieving high efficiency and maintaining stable and reliable operation across diverse load conditions.