Wireless power receiver for mobile devices supporting inductive and resonant operating modes

Author

Satyamoorthy, Anand ; Riehl, P. ; Akram, Hasnain ; Yung-Chih Yen ; Yang, J.-C. ; Juan, Brian ; Chi-Min Lee ; Fu-Chi Lin

Author_Institution

MediaTek, Woburn, MA, USA

fYear

2014

fDate

8-9 May 2014

Firstpage

52

Lastpage

55

Abstract

We demonstrate a compact wireless power receiver for mobile phones that operates either in a resonant mode at 6.78 MHz or an inductive mode in the 110 to 205 kHz range. A coil arrangement and matching network is introduced that is resonant in both frequency bands, allowing the same power conversion circuitry to operate in either mode. The receiver converts up to 5 W of AC power to a regulated 5 V supply with a peak efficiency of 84% in inductive mode and 82% in resonant mode.

Keywords

battery chargers; inductive power transmission; microwave receivers; mobile radio; telecommunication power supplies; coil arrangement; compact wireless power receiver; frequency 110 kHz to 205 kHz; frequency 6.78 MHz; frequency bands; inductive operating modes; matching network; mobile devices; mobile phones; power conversion circuitry; resonant operating modes; voltage 5 V; Coils; Inductive charging; Receivers; Rectifiers; Temperature measurement; Transmitters; Wireless communication; Wireless Charging; Wireless Power;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Power Transfer Conference (WPTC), 2014 IEEE

Conference_Location

Jeju

Type

conf

DOI

10.1109/WPT.2014.6839626

Filename

6839626