@inproceedings{1dda3cc52c834e19a652d33ccb19471c,
title = "Design and fabrication of a 315 μΗ bondwire micro-transformer for ultra-low voltage energy harvesting",
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 (Fair-Rite 5975000801) as a magnetic core. The microtransformer 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 the secondary self-inductance is enhanced from 0.3 μH with an epoxy core to 315 μH with the ferrite 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, a low-voltage IC DC-DC converter solution, with the transformer mounted on-top, is proposed for energy harvesting applications.",
keywords = "bonding wires, bondwire, converter, DC-DC, energy harvesting, ferrite, magnetics, on-chip, PCB, transformer",
author = "Enrico Macrelli and Ningning Wang and Saibal Roy and Michael Hayes and Paganelli, \{Rudi Paolo\} and Marco Tartagni and Aldo Romani",
year = "2014",
doi = "10.7873/DATE2014.155",
language = "English",
isbn = "9783981537024",
series = "Proceedings -Design, Automation and Test in Europe, DATE",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "Proceedings - Design, Automation and Test in Europe, DATE 2014",
address = "United States",
note = "17th Design, Automation and Test in Europe, DATE 2014 ; Conference date: 24-03-2014 Through 28-03-2014",
}