A 6.78mhz 92.3%-Peak-Efficiency Single-Stage Wireless Charger With Cc-Cv Charging And On-Chip Bootstrapping Techniques

Lin Cheng,Xinyuan Ge,Wai Chiu Ng,Wing-Hung Ki,Jiawei Zheng,Tsz Fai Kwok,Chi-Ying Tsui,Ming Liu

2019 SYMPOSIUM ON VLSI CIRCUITS（2019）

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摘要

A fully-integrated wireless charger that realizes voltage rectification, voltage regulation and CC-CV charging in a single power stage is proposed to achieve high efficiency and low cost and volume. A bootstrapping technique is also proposed to integrate bootstrap capacitors on-chip. The charger was designed in a standard 0.35 mu m CMOS process with a die area of 8mm(2), and the measured peak efficiency reaches 92.3% and 91.4% when the charging currents are 1A and 1.5A, respectively.

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关键词

voltage rectification,voltage regulation,CC-CV charging,CMOS process,fully-integrated wireless charger,bootstrap capacitor on-chip technique,single-stage wireless charger,current 1.0 A,current 1.5 A,size 0.35 mum,frequency 6.78 MHz,efficiency 92.3 percent,efficiency 91.4 percent

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