The STWBC from STMicroelectronics is a digital controller for wireless battery charger (WBC) transmitters (TX), offering the most complete, flexible and efficient solution for controlling power transfer to a receiver (RX) in WBC-enabled applications such as phones, wearables, and other portable and battery powered devices that use electromagnetic induction for recharging. As a member of the Qi Wireless Power Consortium and the PMA (Power Matters Alliance), STMicroelectronics ensures full compatibility with these leading wireless charging protocols and holds certification for the Qi 1.1.2 A11 standard.
The STWBC device performs all the functions for transmitter control, utilising an internal 96 MHz clock which supports both half-bridge and full bridge topologies, it is able to precisely control the amount of transmitted power to match the requirements of the receiving unit thus maximizing the efficiency of the power transfer.
Wireless Charging System overview
Data
The STWBC comes with firmware options to offer customers the ability to personalize their end product without the need of external microcontrollers, it provides an API (application programming interface) allowing customization of the underlying firmware, for example modifying the behaviour of the LEDs or GPIOs in response to the receiver behaviour and supporting I²C and UART communication within a network.
STMicroelectronics have provided a STWBC Qi 1.1.2 A11 certified solution via the STEVAL-ISB027V1 evaluation board which is intended for all Qi compatible receivers such as in Qi enabled mobile phones.
STEVAL-ISB027V1 evaluation board
The STWBC reference design integrates the foreign object detection (FOD) which provides the digital feedback between TX and RX units allowing the detection of metal objects close to the receiver that could result in potential hazards, enabling the STWBC to stop power transmission when such objects are detected.
STWBC operational blocks and Qi 1.1.2 A11 configuration
The reference design is offered together with a complete ecosystem of tools to support customers in building their applications, including the Qi 1.1.2 A11 certified evaluation board (STEVAL-ISB027V1), API libraries and documentation to develop software customizations, as well as a comprehensive graphical user interface to monitor real-time performance and diagnostics.
Anglia are offering customers a FREE STEVAL-ISB027V1 STWBC wireless charging evaluation board, please fill in the form below to register your interest now.
FREE samples for UK and Ireland customers only, subject to availability.
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