Conference Publication Details
Mandatory Fields
Macrelli E.;Wang N.;Roy S.;Hayes M.;Paganelli R.;Tartagni M.;Romani A.
Proceedings -Design, Automation and Test in Europe, DATE
Design and fabrication of a 315 bondwire micro-transformer for ultra-low voltage energy harvesting
Scopus: 11 ()
Optional Fields
bonding wires bondwire converter DC-DC energy harvesting ferrite magnetics on-chip PCB transformer
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 H with an epoxy core to 315 H 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. 2014 EDAA.
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