A 13.56MHz Fully Integrated 91.8% Efficiency Single-Stage Dual-Output Regulating Voltage Doubler for Biomedical Wireless Power Transfer

Lu，Tianqi1; Chang，Zu Yao1; Jiang，Junmin2; Makinwa，Kofi1; Du，Sijun1

10.1109/CICC57935.2023.10121186

2023

0886-5930

979-8-3503-9949-3

Proceedings of the Custom Integrated Circuits Conference

2023-April

1-2

23-26 April 2023

San Antonio, TX, USA

Dual-output regulating rectifier is highly desired in wireless power transfer (WPT) for sub-100mW bioimplants. Such rectifiers perform voltage rectification and dual-output regulation simultaneously, thus avoiding post DC-DC conversions and cascaded power losses [1 -4]. However, the conventional dual-output structure suffers from a low voltage conversion ratio (VCR) (< 1) due to the full bridge rectifier (FBR) topology (Fig. 1), severely limiting the receiver operation when wireless link condition varies [1-2]. In order to extend the operational range without increasing the power demand from the transmitter, [3] presents a charge-pump based dual-output rectifier; however, it uses 10 power transistors (PTs) and 8 off-chip capacitors, degrading the power conversion efficiency (PCE) and increasing the integration cost. Alternatively, the current-mode dual-output rectifier can realize a VCR higher than 1, but the output power is limited to less than 10mW [4], which is insufficient for advanced bioimplants. In this work, a 13. 56MHz single-stage dual-output voltage doubler (DOVD) is proposed to address the above limitations, which employs only two PTs and a fully integrated design. lt can achieve a peak VCR of1.78 and outputs power up to 8lmWwith a 91.8% peak PCE.

Wireless communication Transmitters Rectifiers Wireless power transfer Receivers Regulation Topology

其他

英语

2-s2.0-85160007867

Scopus

1.Delft University of Technology,Delft,Netherlands
2.Southern University of Science and Technology,Shenzhen,China

Lu，Tianqi,Chang，Zu Yao,Jiang，Junmin,et al. A 13.56MHz Fully Integrated 91.8% Efficiency Single-Stage Dual-Output Regulating Voltage Doubler for Biomedical Wireless Power Transfer[C],2023:1-2.