Title :
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
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;
Conference_Titel :
Wireless Power Transfer Conference (WPTC), 2014 IEEE
Conference_Location :
Jeju
DOI :
10.1109/WPT.2014.6839626
