A 48-to-4.8V multi-path gan-based hybrid dc-dc converter

Abstract

This thesis presents the development of a high-efficiency, high-power output multi-path resonant DC-DC converter, designed to meet the growing demands of modern electronic systems that require robust load capability and effective thermal management. The proposed converter architecture leverages advanced semiconductor technologies, innovative design strategies, and optimized control techniques to achieve exceptional power density and efficiency.

In addressing the challenges associated with heat dissipation in high-power converters, the research focuses on minimizing power loss, which directly impacts the reliability and longevity of electronic components. The converter targets a frequency efficiency of 96.5%, ensuring optimal performance across a wide output range.

The work begins with a comprehensive review of existing DC-DC converter types, including their advantages and limitations. This sets the stage for the introduction of a novel multi-path resonant converter topology, which combines the strengths of inductive and capacitive conversion techniques to reduce conduction losses and enhance overall efficiency.

Control techniques for powering floating gate drivers are also explored, providing the necessary support for the converter’s operation under varying load conditions. The design is validated through extensive simulations, demonstrating the converter’s ability to handle high currents while maintaining high efficiency. A PCB prototype is also developed to further validate the proposed design.

The results of this research indicate that the proposed converter not only meets but exceeds current performance benchmarks, offering a viable solution for high-power density applications in data centres, telecommunications, and other industrial systems.