1-W 3.3-16.3-V boosting wireless power transfer circuits with vector summing power controller

Kazutoshi Tomita, Ryota Shinoda, Tadahiro Kuroda, Hiroki Ishikuro

    Research output: Contribution to journalArticle

    30 Citations (Scopus)

    Abstract

    This paper presents SD-card-size wireless power transfer system for large-volume contactless memory cards. Voltage is boosted simultaneously with power transfer, which eliminates the dc-dc converter or charge-pump circuit for data write operation into the flash memory chip. The proposed approach reduces the number of components and BOM cost and improves the total power efficiency. A vector summing technique is proposed to control the transmitting power and secondary side voltage. The transmitter and rectifier have been designed and fabricated using 0.18-μ m-CMOS with high voltage option. Voltage boost from 3.3 to 16.3 V and 1-W power transfer with 50% total efficiency have been successfully demonstrated, and the response time for the power control loop is shorter than 35 μs.

    Original languageEnglish
    Article number6301783
    Pages (from-to)2576-2585
    Number of pages10
    JournalIEEE Journal of Solid-State Circuits
    Volume47
    Issue number11
    DOIs
    Publication statusPublished - 2012 Sep 18

    Keywords

    • Coils
    • MOS devices
    • memory card
    • power control
    • voltage control
    • voltage-boosting circuits
    • wireless power transmission

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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