Wide Bandgap Advancements in USB Power Delivery

This article is a technical report discussing the evolution of USB technology, particularly focusing on the USB Power Delivery (USB PD) 3.1 specification and the role of Gallium Nitride (GaN) technology in enhancing power delivery efficiency and density. It outlines the challenges posed by the increasing power demands of modern electronic devices and explains how GaN technology addresses these challenges. The report presents a case study of the EPC9195, a reference design for a high-power density USB PD charger, showcasing the advantages of GaN transistors and an analog controller in achieving high efficiency and compactness. Experimental results demonstrate the performance and efficiency of the design, making it suitable for next-generation electronic devices requiring USB PD 3.1 compatibility. The report includes detailed descriptions of the converter's components, operational characteristics, and validation results, emphasizing the significant improvements in efficiency and power density achieved through the use of GaN technology.