A Stacked Piezoelectric Converter Using a Segmented IDT Lithium Niobate Resonator

Piezoelectric resonators promise to increase dc-dc converter power density by replacing inductive components. However, piezoelectric resonators are not direct circuit level replacements for inductors, requiring new topologies. In this paper, we present a stacked converter using two piezoelectric res...

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Bibliographic Details
Published inIEEE open journal of power electronics Vol. 5; pp. 286 - 294
Main Authors Braun, Weston D., Stolt, Eric A., Nguyen, Kristi, Segovia-Fernandez, Jeronimo, Chakraborty, Sombuddha, Lu, Ruochen, Rivas-Davila, Juan M.
Format Journal Article
LanguageEnglish
Published IEEE 2024
Subjects
Capacitance
DC-DC power converters
Density measurement
Inductors
piezoelectric devices
Power system measurements
resonant converters
Switches
Topology
Voltage
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Summary:Piezoelectric resonators promise to increase dc-dc converter power density by replacing inductive components. However, piezoelectric resonators are not direct circuit level replacements for inductors, requiring new topologies. In this paper, we present a stacked converter using two piezoelectric resonators, providing improved efficiency at low conversion ratios. This converter is realized with a lithium niobate thickness-shear mode resonator with interdigitated electrodes that allow the two resonators required for the topology to be realized as tightly matched sub-resonators on the same substrate. The 180 V to 60 V converter operates between 6.15 MHz and 6.35 MHz and achieves a resonator-level power density of <inline-formula><tex-math notation="LaTeX">\text{1.34}\;\text{kW}/\text{cm}^{3}</tex-math></inline-formula>.
ISSN:2644-1314
2644-1314
DOI:10.1109/OJPEL.2024.3365029