As wireless power transfer technology continues to mature and user awareness increases, the reliability and robustness of these wireless charging systems continues to improve. In addition to enabling systems to be waterproof so they are easier to clean and sterilize, new applications such as medical equipment and drones are beginning to emerge.

As one of the world's leading suppliers of power management solutions, ST offers wireless battery charger ICs  addressing all major standards and technologies, with a complete portfolio of both transmitter and receiver chip-sets optimized for different implementation requirements and ready to comply with the major wireless charging standards including Qi by Wireless Power Consortium (WPC).

The STWBC family of transmitter ICs performs all the functions for transmitter control, ensuring compliancy with the leading standards in the market and providing customers with a turnkey Qi-certified solution, for a fast go-to-market strategy, or with an environment to build personalized solutions. Efficient power transfer is enhanced by a smart standby state while waiting for a receiver, which guarantees a power consumption as low as 3 mW while maintaining the foreign object detection (FOD) function active for maximum safety.

The STWLC family of receiver ICs meets all the requirements of the growing consumer market providing a flexible solution interoperable with Qi and AirFuel Inductive charging standards. STWLC family is able to efficiently charge any battery chemistry like single-cell Li-Polymer/ Li-Ion and support direct charging, transmitter functions is also integrated. An embedded 32-bit microcontroller and integrated non-volatile memory allow a very wide range of customization. All this come in a minuscule footprint chip-scale package, ideal for space-constrained portable applications.

To support customers in building their applications and minimize the time-to-market, a complete development ecosystem is available including certified reference design boards, API libraries and documentation to customize software, and graphical user interfaces to access to real-time data and configurable parameters.

Wireless charger ICs

Qi®-Compliant 15 W Multi-Coil Wireless Charger for Mobile Devices

STWBC-MC 15 W wireless battery-charger transmitter can control multiple charging coils, making charging less dependent on the precise position of the battery-powered device. Compliant with the latest Qi® 1.2.4 specification, 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. The STWBC-MC also supports the proprietary wireless fast-charge extensions of leading smartphone manufacturers.

Plug-and-Play Wireless-Charging Kit for Ultra-Compact Chargers for Wearables and IoT Devices

Built around the STWBC-WA wireless charging-transmitter controller, the STEVAL-ISB045V1 kit lets users quickly build ultra-compact chargers up to 2.5W with a space-saving 20mm-diameter coil, for charging small IoT devices and wearables such as smart watches, sports gear, or healthcare equipment.

Getting started is easy, using the PC-based STSW-STWBCGUI software to configure the STWBC-WA and monitor runtime information such as power delivered, bridge frequency, demodulation quality, and protocol status. The kit includes a dongle for running the GUI.

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