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Automotive Wireless Transmitter Controller
Features
• Conforms to the latest version WPC “Qi” specification
• Supports wide DC input voltage range of 6 V (limited duration at Start/Stop operation) to 16 V for automotive battery input
• Supports Foreign Object Detection (FOD)
• Low-power system standby available using Freescale Touch technology
• Provides free positioning solutions by using WPC A or B type multi-coil technology
• Uses rail voltage control or phase shift control with fixed operating frequency to control power transfer to help alleviate automotive system interference
• Supports the key FOB avoidance function
• Supports the operation frequency dithering technology to eliminate the AM band interference
• Improved EMC performance for automotive certification
• Supports CAN/LIN/IIC/SCI/SPI interfaces
• LED for system status indication
• Over-voltage/current/temperature protection
• Software based solution to provide maximum design freedom and product differentiation
• AEC-Q100 grade 2 certification
• Dual-mode capable

Overview Description
The WCT100xA is a wireless power transmitter controller that integrates all required functions for WPC “Qi” compliant wireless power transmitter design. The WCT100xA transmitter IC manages the power transfer by receiving commands from the receiver. Receivers are detected by using either standard protocol methods or Freescale touch sensor technology. Once the mobile device is detected, the WCT100xA controls the power transfer by adjusting rail voltage or phase shift of power stage according to message packets sent by mobile device.
To maximize the design freedom and product differentiation, the WCT100xA supports any 5W coil topology capable of supporting WPC Qi-based implementation. In addition, the system supports both WPC and PMA protocols.
The WCT100xA also includes CAN/LIN/IIC/SCI/SPI interfaces, over-voltage/current/temperature protection and FOD method to protect from overheating by misplaced metallic foreign objects. It also handles any system fault and operation status, and provides comprehensive indicator outputs for robust system design.
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