User guide

2 System Features
The WCT_15W1COILTX reference board has these features:
• Reference design compliant with Qi Medium Power v1.2 specification
• Integrated digital demodulation in chip
• Supports multiple types of RX modulation signals (AC capacitor, AC resistor, and DC
resistor)
• Supports two-way communication
• Supports FOD based on quality factor (Q factor) change
• Supports FOD based on calibrated power loss accounting
• Supports Qi MP receiver with 15W output power capability
• Supports Qi LP receiver with 5W output power capability
• Super low standby power
• Supports switch between full bridge topology and half-bridge topology
• Supports frequency control, phase shift control, and duty control algorithm
• LED for system status indication
• Input voltage, input current, and coil current sensing
• Board and coil temperature sensing
• FreeMASTER GUI tool to enable customization and calibration
• Supports debug console
3 Package Checklist
Table-1 Package checklist
Name Count
WCT-15W1COILTX board
1
4 System Block Diagram
MP TX runs with RX to transfer power from the primary to the secondary side as well as send messages to
RX by frequency shift keyed modulation (FSK), as shown in this figure.
Figure 2 Wireless Charging System overview
WCT1012 15W Single Coil TX V3.0 Reference Design System User’s Guide, Rev. 0, 09/2015
2 Freescale Semiconductor