The 5 W single-coil wireless charging transmitter reference design uses NXP's MWCT1000 transmit controller IC to manage and perform all control functions necessary to implement a wireless charging transmitter solution. This solution is highly-optimized to provide the lowest-bill-of-materials cost, as well as highest-performance. The design complies with the wireless power consortium's latest Qi specification, and is certified as a WPC-A11 transmitter type. Among the many features of this design, the solution has been developed to provide a more general solution which operates with many different coil types.
The design is based on the wireless power consortium (WPC) A11 transmitter definition, comprising of a 5 VDC input source, full-bridge inverter topology and frequency-control methodology. NXP 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.