overview 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). 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. target applications ? 5 w single-coil wireless charging applications ? mobile phone chargers ? point-of-sale terminals ? handheld medical devices ? mobile phone accessories such as battery banks and active phone sleeves ? pc accessories, including keyboards and mice exceptional performance at a low cost wir eless charging ic inverter contr ol low-power pr e-drive t ouch-sensing power stage demodulation gpio freescale technology optional wct-5w1coiltx single-coil wireless charger block diagram wct-5w1coiltx single-coil wireless charger block diagram freescale single-coil wireless charger reference design consumer, industrial
freescale, the freescale logo and codewarrior 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 freescale semiconductor, inc. document number: wct5w1coiltxfs rev 0 for more information, visit freescale.com/wct-5w1coiltx features features benefits compliant with latest wpc qi specification ensure end solution meets latest industry specification transfer efficiency greater than 75% maximum energy transfer and lower thermal footprint meets latest fod requirements ensure foreign objects are detected and provides safety function supports most 5 w single-coil type using 5 v power source provides a broad range of magnetics support with a single solution main controller ic provides low active run power (30ma) increase overall operating efficiency less than 30 mw standby power consumption (using freescale proximity detection technology) lowest standby operating mode support for current limited power sources operate from pc-based power sources spi, uart, i 2 c communication interfaces communicate to and from wireless charging ic to transfer charging information (mwct1101clh only) on-chip digital demodulation lower system bom and greater performance run-time calibration fast and accurate system calibration, saving time and effort to optimize system performance wpc a11, a12, a16 support extend support for any defined 5 v single-coil application wct firmware library choose as-is firmware or build value-added features onto existing library package options part number package available flash size key features MWCT1000CFM 32-pin qfn na complete controller solution, support most qi 5 w single coils mwct1101clh 64-pin lqfp 40 kb premium controller, i 2 c, uart, spi, flash memory for application programming additionally, the 5w1coiltx reference design uses freescales innovative wireless charging transmit controller to perform digital demodulation on incoming communication from the receiver. this unique feature provides a major reduction in bom costs and the added benefit of a reduced pcb footprint. another feature is robust foreign object detection (fod) algorithm. this feature detects metallic objects such as aluminum or steel objects that may be present in the charging environment. freescale foreign object detection algorithms easily meet and exceed the latest standards within industry. ultimately, the 5w1coiltx reference design is a complete system solution, containing all of the hardware and software components necessary to quickly implement a single- coil charger solution. 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. development tools wct-5w1coiltx bom-cost optimized single-coil 5 w reference design for any type of closely coupled inductive charging application 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 wctgui graphical user interface tool for quickly configuring and optimizing wireless charging transmitter solutions
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