This paper presents a design study of a new topology for miniaturized bondwire transformers fabricated and assembled with standard IC bonding wires and toroidal ferrite as a magnetic core. The micro-transformer realized on a PCB substrate enables the build of magnetics on-top-of-chip thus leading to the design of high power density components . Impedance measurements in a frequency range between 100 kHz to 5 MHz show that secondary self-inductance is enhanced from 300 nH with an epoxy core to 315 µH with a ferrite toroidal core. Moreover the micro-machined ferrite improves the coupling coefficient from 0.1 to 0.9 and increases the effective turns ratio from 0.5 to 35. Finally an IC integrated solution with the transformer mounted on-top of a low-voltage DC-DC converter for energy harvesting applications is proposed

Enrico Macrelli, Ningning Wang, Saibal Roy, Michael Hayes, Rudi Paolo Paganelli, Marco Tartagni, et al. (2014). Design and fabrication of a 315 uH bondwire micro-transformer for ultra-low voltage energy harvesting. IEEE [10.7873/DATE.2014.155].

Design and fabrication of a 315 uH bondwire micro-transformer for ultra-low voltage energy harvesting

MACRELLI, ENRICO;PAGANELLI, RUDI PAOLO;TARTAGNI, MARCO;ROMANI, ALDO
2014

Abstract

This paper presents a design study of a new topology for miniaturized bondwire transformers fabricated and assembled with standard IC bonding wires and toroidal ferrite as a magnetic core. The micro-transformer realized on a PCB substrate enables the build of magnetics on-top-of-chip thus leading to the design of high power density components . Impedance measurements in a frequency range between 100 kHz to 5 MHz show that secondary self-inductance is enhanced from 300 nH with an epoxy core to 315 µH with a ferrite toroidal core. Moreover the micro-machined ferrite improves the coupling coefficient from 0.1 to 0.9 and increases the effective turns ratio from 0.5 to 35. Finally an IC integrated solution with the transformer mounted on-top of a low-voltage DC-DC converter for energy harvesting applications is proposed
2014
Proceedings of Design, Automation and Test in Europe (DATE), 2014
1
4
Enrico Macrelli, Ningning Wang, Saibal Roy, Michael Hayes, Rudi Paolo Paganelli, Marco Tartagni, et al. (2014). Design and fabrication of a 315 uH bondwire micro-transformer for ultra-low voltage energy harvesting. IEEE [10.7873/DATE.2014.155].
Enrico Macrelli; Ningning Wang; Saibal Roy; Michael Hayes; Rudi Paolo Paganelli; Marco Tartagni; Aldo Romani
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/366737
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