Consumer, Industrial
Freescale Single-Coil Wireless
Charger Reference Design
Exceptional performance at a low cost
Target Applications
Overview
• 5 W single-coil wireless charging
applications
The 5W1COILTX is a 5 W single-coil transmitter reference design based on the Freescale
MWCT1000CFM wireless charging IC. The Freescale 5 W single-coil transmitter provides what
engineers need most: high performance at low cost. The reference design provides the highest
efficiency and active charging area available while maintaining the most cost competitive electronic
bill of materials (BOM).
• Mobile phone chargers
• Point-of-sale terminals
• Handheld medical devices
The design is based on the Wireless Power Consortium (WPC) A11 transmitter definition, comprising
of a 5 V DC input source, full-bridge inverter topology and frequency control methodology. Freescale
extends support to any coil topology which uses a 5 V input source; therefore, this reference design
currently supports A11, A12 and A16 coil configurations on a single platform, as well as any future
single coil design. This reduces the need for different hardware to support multiple (and future) coil
types with similar characteristics.
• Mobile phone accessories such as
battery banks and active phone sleeves
• PC accessories, including keyboards
and mice
WCT-5W1COILTX Single-Coil Wireless Charger Block Diagram
Power Stage
Touch-Sensing
Pre-Drive
Inverter Control
Demodulation
GPIO
Wireless Charging IC
Low-Power
Freescale Technology
Optional