Title :
Efficient hard-switching DC/DC converters for envelope-tracking applications
Author :
Leroy, Fabien ; Deblecker, Olivier ; Dualibe, Fortunato ; Delepaut, Christophe ; Le Gallou, Nicolas
Author_Institution :
Univ. of Mons, Mons, Belgium
Abstract :
This paper presents two buck converters switching at 50 MHz and based on Gallium Nitride dice. The first converter features a diode designed for power applications and demonstrates 87.9% peak efficiency. The diode mounted on the second one is aimed at higher-frequency operation and brings this value up above 91% in the same operating conditions. Loss contributions are evaluated, showing the influence of the diode alone on the efficiency of such converters.
Keywords :
DC-DC power convertors; III-V semiconductors; diodes; gallium compounds; radiofrequency power amplifiers; switching convertors; wide band gap semiconductors; GaN; buck converters; envelope-tracking applications; frequency 50 MHz; gallium nitride dice; hard-switching DC-DC converters; Capacitance; Gallium nitride; Radio frequency; Schottky diodes; Substrates; Transistors; Voltage measurement; Gallium Nitride (GaN); High frequency power converter; Schottky diode; Silicon Carbide (SiC);
Conference_Titel :
Power Electronics and Applications (EPE'14-ECCE Europe), 2014 16th European Conference on
Conference_Location :
Lappeenranta
DOI :
10.1109/EPE.2014.6910744
