Freescale Wireless Charging ICs
WCT-15W1COILTX
Exceptional performance at the lowest cost
Overview
The 15W1COILTX reference design is a 15 watt single-coil transmitter reference design
based on the Freescale MWCT1012 wireless charging IC. The Freescale 15 W single-coil
transmitter focuses on what the market needs most–highest performance at the lowest cost.
The reference design provides the highest efficiency and active charging area available, while
maintaining the most competitive electronic bill of materials (BOM) cost.
The 15W1COILTX reference design is a unique Freescale design, comprising a 12 V DC input
source, full-bridge inverter topology, and frequency control methodology and fully compliant
with the latest Wireless Power Consortium (WPC) 15 W specification. Freescale extends
support to any coil topology which uses a 12 V input source. This reduces the need for
different hardware to support multiple (and future) coil types with similar characteristics.
The reference design uses Freescale’s innovative wireless charging transmit controller IC
to perform digital demodulation on incoming signals from the receiver. This unique feature
provides a major reduction in BOM costs and reduces the PCB footprint.
An additional feature of the solution is a robust foreign object detection (FOD) algorithm. This
feature detects metallic objects, such as aluminum or steel objects which may be present in
the charging environment. Freescale foreign object detection algorithms meet and exceed the
latest standards within industry.
Target Applications
• 15 W single-coil wireless
charging applications
• Mobile phone chargers
• Tablet PCs
• Point-of-sale terminals
• Hand-held medical devices
• Mobile phone accessories such
as battery banks and active
phone sleeves
WCT-15W1COILTX Single-Coil Wireless Charger
Block Diagram
Single-Coil Wireless Charger Block Diagram
WCT-15W1COILTX
Power Stage
Pre-Drive
Inverter Control
Low-Power
(Optional)
Communications
GPIO
MWCT1012
Freescale Technology
The WCT-15W1COILTX reference design is
a complete system solution, containing all
of the hardware and software components
necessary to quickly implement a single-coil
charger solution. Special attention has been
placed on BOM costs in order to deliver a
production-ready design. Freescale provides
all of the necessary hardware documentation:
including schematics, layout and assembly
files, as well as a complete BOM. A firmware
library is provided which contains all of the
necessary wireless charging control blocks.
Access to the library is provided via an API
which lets users interact with parameters
and settings contained in the firmware,
providing maximum control to the engineer.
Customers can choose to use a ready-to-use
binary file provided by Freescale or to take a
more developmental approach and build an
application around the firmware library.
WCT-15W1COILTX Features and Benefits
Features
Compliant with latest Wireless Power
Consortium (WPC) Qi specification
Transfer efficiency greater than 75%
Meets latest FOD requirements
Supports any 15 W single-coil type using
a 12 V power source
Low active RUN power
Low standby power
SPI, UART, I
2
C communication interfaces
On-chip digital demodulation
Run-time calibration
Benefits
Ensures end solution meets latest industry specification
Maximum energy transfer and lower thermal footprint
Ensures foreign objects are detected and provides safety function
Provides a broad range of magnetics support with a single
solution
Increases overall operating efficiency
Low power operating modes translate into lower power
consumption during periods of inactivity
Communicate to and from wireless charging IC to transfer
charging information (MWCT1111 only)
Lower system bill-of-materials (BOM) and greater performance
Fast and accurate system calibration, saving time and effort to
optimize system performance
Package Options
Part Number
MWCT1012
MWCT1111
Development Tools
Eclipse
™
based CodeWarrior
Development Studio for
Microcontrollers
A complete integrated development
environment (IDE) that provides a
highly-visual and automated framework
to accelerate the development of the most
complex embedded applications.
Package
32-pin QFN
64-pin LQFP
Available
Flash Size
NA
40 KB*
Key Features
Complete controller solution, supports most Qi
15 W single coil systems
Premium controller, I
2
C, UART, SPI, flash memory
for application programming
* Available memory is an estimate only
WCTGUI
Graphical User Interface tool allows for quick
configuring and optimizing wireless charging
transmitter solutions.
For more information visit
freescale.com/wirelesscharging
Freescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off.
All other product or service names are the property of their respective owners. © 2014– 2015 Freescale Semiconductor, Inc.
Document Number:
WCT15W1COILTXFS REV 2
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