期刊
IEEE JOURNAL OF SOLID-STATE CIRCUITS
卷 47, 期 11, 页码 2576-2585出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2012.2211698
关键词
Coils; memory card; MOS devices; power control; voltage-boosting circuits; voltage control; wireless power transmission
资金
- CREST/JST
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-mu 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 mu s.
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