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

Author

Tomita, Kazutoshi ; Shinoda, Ryota ; Kuroda, Tadahiro ; Ishikuro, Hiroki

Author_Institution

Dept. of Electron. & Electr. Eng., Keio Univ., Yokohama, Japan

fYear

2011

fDate

14-16 Nov. 2011

Firstpage

177

Lastpage

180

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 improve the total power efficiency. Vector summing technique is proposed to control the transmitting power and secondary side voltage. The transmitter and rectifier have been designed and fabricated using 0.18μm-CMOS with high voltage option. Voltage boost from 3.3V to 16.3V and 1W power transfer with 50% total efficiency have been successfully demonstrated.

Keywords

CMOS integrated circuits; DC-DC power convertors; charge pump circuits; flash memories; inductive power transmission; memory cards; power control; rectifying circuits; voltage control; CMOS process; DC-DC converter; SD card size wireless power transfer system; boosting wireless power transfer circuits; charge-pump circuit; efficiency 50 percent; flash memory chip; large volume contactless memory cards; power 1 W; rectifier; secondary side voltage voltage; size 0.18 mum; total power efficiency; transmitter; vector summing power controller; voltage 3.3 V to 16.3 V; Boosting; Coils; MOS devices; Power control; Rectifiers; Voltage control; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid State Circuits Conference (A-SSCC), 2011 IEEE Asian

Conference_Location

Jeju

Print_ISBN

978-1-4577-1784-0

Type

conf

DOI

10.1109/ASSCC.2011.6123631

Filename

6123631