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학술지 Voltage-Boosted Current-Mode Wireless Power Receiver for Directly Charging a Low-Voltage Battery in Implantable Medical Systems
Cited 0 time in scopus
저자
이상한, 방준석, 윤계석, 권희동, 김상원, 조인귀, 홍성완, 조규형
발행일
201911
출처
IEEE Transactions on Industrial Electronics, v.66 no.11, pp.8860-8865
ISSN
0278-0046
출판사
IEEE
DOI
https://dx.doi.org/10.1109/TIE.2018.2873525
협약과제
18ZR1200, 지능형 전파센서 및 무선 에너지 전송 원천기술 개발, 이호진
초록
© 2018 IEEE. In this paper, a resonant current-mode receiver is studied to charge low-voltage batteries wirelessly for supplying medical implantable systems. To increase efficiency, the root-mean-square (rms) current in the LC tank of the receiver (RX) is reduced by using a voltage-boosted current-mode (VBCM) receiver. This receiver combines the conventional current-mode receiver with a switched-capacitor converter to boost the voltage instantaneously at the switching node (VX) of coil. Owing to the suggested technique, the receiver directly charges a low-voltage battery while maintaining a small rms current without using a complex voltage regulator. The receiver achieves an efficiency as high as 84.7% with a 1.1 V battery while operating at the resonant frequency (freso) of 6.78 MHz. The power delivered to the output (PO) is in the range from 1.5 to 50 mW. The VBCM receiver was fabricated by 180 nm CMOS technology with a total active area of 0.22 mm2.
키워드
Current-mode receiver, implantable medical system (IMS), low-voltage battery, voltage boosting, wireless power transfer
KSP 제안 키워드
2 mm, Active area, CMOS Technology, Complex Voltage, Current-mode(CM), Implantable systems, LC tank, RMS current, Resonant frequency(Fr), Root mean square(RMS), Switched Capacitor(SC)