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Development of microtransformers using MCM and electronic packaging technologies

Published: 28 August 2017 Publication History
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  • Abstract

    Several electronic systems such as implants and wireless sensors networks could benefit from compact transformers. In this paper, the development of microtransformers on a MCM (Multi Chip Module) platform is presented. The windings were manufactured using wirebonding of Au wires. Electrical characterization of the prototypes showed results as good as those built with printed circuit boards, providing coupling factor as high as 95,2% @10Vpp/1MHz, with the advantage of a dimensional reduction. An oscillator for energy harvesting was assembled in order to verify the functionality of the transformer. The circuit was able to operate with a minimum supply of 30 mV and could deliver 640 μW from a source of 100 mV.

    References

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    E. Macrelli et al. 2015. Modeling, Design, and Fabrication of High-Inductance Bond Wire Microtransformers with Toroidal Ferrite Core. IEEE Trans. Power Electron. 30, 10 (2015), 5724--5737.
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    C. Ó Mathúna, N. Wang, S. Kulkarni, and S. Roy. 2012. Review of Integrated Magnetics for Power Supply on Chip (PwrSoC). IEEE Trans. Power Electron., 27, 11 (2012), 4799--4816.
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    A. C. C. Telles. 2016. Contribution to Modeling and Realization of Ultralow Voltage Oscillators with Application to Energy Harvesting. Ph. D. Thesis, University of Campinas, Campinas, Brazil (in Portuguese).
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    J. Lu, H. Jia, A. Arias, X. Gong and Z. J. Shen. On-chip bondwire transformers for power SOC applications. Proc. Appl. Power Electron. Conf., Feb. 2008, pp. 199--204
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    E. Macrelli et al. 2014. Design and Fabrication of a 29 μH Bondwire Microtransformer with LTCC Magnetic Core on Silicon for Energy Harvesting Applications. In Proc. Eurosensors Conf., 1--4.
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    C. B. Adamo et al. 2015. Development of MCM-D Technology with Photosensitive Benzocyclobutene. In Proc. 30th Symp. Microelectronics Technology and Devices --- SBMicro 2015, 1--4.
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    J. Rogers and C. Plett. 2003. Radio Frequency Integrated Circuit Design, Artech House, ch. 8.
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    A. C. C. Telles, S. Finco, and J. A. Pomílio. 2014. Modeling of a MOS Ultralow Voltage Oscillator for Energy Harvesting. IEEE Trans. Circuits and Syst. II - Express Briefs 62, 3 (2014), 168--172
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    A. C. C. Telles, S. Finco and J. A. Pomilio. Modeling of a MOS Ultralow Voltage Oscillator: Experimental Results. To be published.
    [10]
    BSH103 datasheet; available at <https://assets.nexperia.com/documents/data-sheet/BSH103.pdf> on 01/07/2017

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    • (2019)A 4 mm toroidal microtransformer built with wire bonding and MCM technologies2019 34th Symposium on Microelectronics Technology and Devices (SBMicro)10.1109/SBMicro.2019.8919297(1-4)Online publication date: Aug-2019

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    Published In

    cover image ACM Conferences
    SBCCI '17: Proceedings of the 30th Symposium on Integrated Circuits and Systems Design: Chip on the Sands
    August 2017
    238 pages
    ISBN:9781450351065
    DOI:10.1145/3109984
    © 2017 Association for Computing Machinery. ACM acknowledges that this contribution was authored or co-authored by an employee, contractor or affiliate of a national government. As such, the Government retains a nonexclusive, royalty-free right to publish or reproduce this article, or to allow others to do so, for Government purposes only.

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    New York, NY, United States

    Publication History

    Published: 28 August 2017

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    Author Tags

    1. PwrSiP
    2. PwrSoC
    3. energy harvesting

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    • Research-article

    Funding Sources

    • CNPq
    • FINEP

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    SBCCI '17
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    SBCCI '17: 30th Symposium on Integrated Circuits and Systems Design
    August 28 - September 1, 2017
    Ceará, Fortaleza, Brazil

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    Overall Acceptance Rate 133 of 347 submissions, 38%

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    • (2019)A 4 mm toroidal microtransformer built with wire bonding and MCM technologies2019 34th Symposium on Microelectronics Technology and Devices (SBMicro)10.1109/SBMicro.2019.8919297(1-4)Online publication date: Aug-2019

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