The latest from STMicroelectronics (ST) is STWBC-MC 15W wireless battery-charger transmitter, which is Compliant with the latest Qi 1.2.4 specification. It can control multiple charging coils, making charging less dependent on the precise position of the battery-powered device.
The STWBC-MC is the first transmitter specifically designed to support the Qi MP-A15 EPP (Extended Power Profile) topology. In addition to detecting a valid receiver and selecting the most efficient coil for power transfer, it ensures extended Foreign Object Detection (FOD) through bi-directional communication with the receiver.
Users can start development quickly using the STEVAL-ISB047V1 evaluation kit for the STWBC-MC and the STSW-STWBCGUI graphical user interface for ST’s STWBC transmitter ICs. The GUI can be used to download the STSW-ISB047FW dedicated firmware for the newly launched charger, and to monitor performance and fine-tune parameters.
It is in production, priced from $3.375 for orders of 1000 pieces. The STEVAL-ISB047V1 is available now from st.com or distributors, for $170.