1-W 3.3-16.3-V Boosting Wireless Power Transfer Circuits With Vector Summing Power Controller

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 red...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2012-11, Vol.47 (11), p.2576-2585
Main Authors: Tomita, K., Shinoda, R., Kuroda, T., Ishikuro, H.
Format: Article
Language:English
Subjects:
Applied sciences
Boosting
Charge pumps
Circuit properties
Coils
Design. Technologies. Operation analysis. Testing
Electric, optical and optoelectronic circuits
Electronic circuits
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Integrated circuits
Integrated circuits by function (including memories and processors)
memory card
MOS devices
Power control
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Signal convertors
Vectors
Voltage control
voltage-boosting circuits
Wireless communication
wireless power transmission
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Summary: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 .
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2012.2211698