A planar 75% efficient GaN 1.2-GHz DC-DC converter with self-synchronous rectifier
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AuthorRamos, Ignacio; Ruiz Lavín, María de las Nieves; García García, José Ángel; Maksimovic, Dragan; Popovic, Zoya
This paper presents the design and characterization of a DC-DC converter operating at 1.2GHz with a maximum efficiency of 75% at 4.6W output power, and with a maximum output power of 13W at 58% efficiency. The microwave converter consists of a GaN class-E power amplifier coupled to a GaN class-E rectifier. The circuit is planar and exhibits a power density of approximately 0.65W/cm3 at the 75% efficiency point. The rectifier can be operated with input gate drive or selfsynchronously with a single RF input.