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Evaluation of gallium nitride transistors in high frequency resonant and soft-switching DC-DC converters
Ist Teil von
2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014, 2014, p.464-470
Ort / Verlag
IEEE
Erscheinungsjahr
2014
Quelle
IEEE Electronic Library (IEL)
Beschreibungen/Notizen
The emergence of gallium nitride (GaN) based power devices offers the potential to achieve higher efficiencies and higher switching frequencies than possible with aging silicon (Si) power MOSFETs. In this paper, we will evaluate the ability of gallium nitride transistors to improve efficiency and output power density in high frequency resonant and soft-switching applications. To experimentally verify the benefits of replacing Si MOSFETs with enhancement mode GaN transistors (eGaN ® FETs) in a high frequency resonant converter, 48 V to 12 V unregulated isolated bus converter prototypes operating at a switching frequency of 1.2 MHz and an output power of up to 400W are compared using Si and GaN power devices.