TY - GEN
T1 - Single-stage dual-output AC-DC converter for wireless power transmission
AU - Xue, Zhongming
AU - Fan, Shiquan
AU - Zhang, Lina
AU - Guo, Zhuoqi
AU - Dong, Li
AU - Li, Dan
AU - Geng, Li
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/5/9
Y1 - 2018/5/9
N2 - Wireless power transmission (WPT) system is widely used in implantable biomedical applications. Conventional power management unit (PMU) in the secondary side normally consists of rectifier and DC-DC converters in series, which shows low power conversion efficiency (PCE). In this work, we propose a single-stage AC-DC converter with dual regulated-outputs, combining output regulation with full-wave active rectifier, which not only improves the power efficiency, but also saves silicon area. Also, a new scheme of delay control is designed to eliminate the high-speed and high-precision comparator used in conventional rectifier, thus reduces the power loss significantly. Trough reusing MOS transistors and adjusting the gate voltage swings, 2X and 3X step-up regulated voltages are realized. A 13.56 MHz integrated AC-DC converter that delivers 10mA output power has been implemented in a standard 180nm CMOS process with a small chip area of 0.663mm2. Measurement results demonstrate that it can properly operate with a 0.5∼1V AC input, directly providing two regulated DC output voltages of 1.7V and 2.75V. Peak PCE of 79% is obtained under the load of 7.1mW. It has the benefits of compactness, high PCE, high voltage conversion ratio (VCR) and flexible outputs. To date, this work is the first to report the single-stage AC-DC converter with regulated multi-outputs for WPT systems.
AB - Wireless power transmission (WPT) system is widely used in implantable biomedical applications. Conventional power management unit (PMU) in the secondary side normally consists of rectifier and DC-DC converters in series, which shows low power conversion efficiency (PCE). In this work, we propose a single-stage AC-DC converter with dual regulated-outputs, combining output regulation with full-wave active rectifier, which not only improves the power efficiency, but also saves silicon area. Also, a new scheme of delay control is designed to eliminate the high-speed and high-precision comparator used in conventional rectifier, thus reduces the power loss significantly. Trough reusing MOS transistors and adjusting the gate voltage swings, 2X and 3X step-up regulated voltages are realized. A 13.56 MHz integrated AC-DC converter that delivers 10mA output power has been implemented in a standard 180nm CMOS process with a small chip area of 0.663mm2. Measurement results demonstrate that it can properly operate with a 0.5∼1V AC input, directly providing two regulated DC output voltages of 1.7V and 2.75V. Peak PCE of 79% is obtained under the load of 7.1mW. It has the benefits of compactness, high PCE, high voltage conversion ratio (VCR) and flexible outputs. To date, this work is the first to report the single-stage AC-DC converter with regulated multi-outputs for WPT systems.
KW - AC-DC converter
KW - Delay time controller
KW - Dual-output
KW - Ultra-low power consumption
KW - Wireless power transmission
UR - https://www.scopus.com/pages/publications/85048066722
U2 - 10.1109/CICC.2018.8357023
DO - 10.1109/CICC.2018.8357023
M3 - 会议稿件
AN - SCOPUS:85048066722
T3 - 2018 IEEE Custom Integrated Circuits Conference, CICC 2018
SP - 1
EP - 4
BT - 2018 IEEE Custom Integrated Circuits Conference, CICC 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE Custom Integrated Circuits Conference, CICC 2018
Y2 - 8 April 2018 through 11 April 2018
ER -