AMSV Newsletter 2016

A Dual-Output Wireless Power Transfer System with Active Rectifier
and 3-Level Operation
Yan Lu, Mo Huang, Lin Cheng, Wing-Hung Ki, Seng-Pan U, and R. P. Martins
In IEEE TPEL 2017
[Accepted in 2016]
From Integrated Power research line
Motivation
Architecture
Wireless power transfer (WPT) systems for
batteryless and wirelessly charged devices
have attracted enormous attention in recent
years.
The 3-level DC-DC and the SIMO techniques are naturally
merged with a 2X rectifier (voltage doubler) which readily
has two DC supplies (three levels, including GND).
To cut the last wire of the electronic devices,
this work was designed for the wirelessly
powered flash memory drives that
need multiple supply levels with a total
power consumption of sub-1W.
For miniature size and small output ripple,
multi-level operation and single-inductor
multiple-output techniques are employed in
this prototype.
Implementation
Verification
The proposed WPT system was fabricated in a 0.35μm
CMOS process, and measured with low-cost PCB coils.
Measured voltage and inductor current waveforms of the
WPT receiver.