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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) and AirFuel.

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.

Qi Compliant Wireless Charging Solution boosts efficiency and reverse power transfer

With increasing demand for more power and higher efficiency,  STWLC68 product family provides the solution for wireless-charging applications with industry-leading efficiency, high power transfer and safety. ST’s newest wireless-charging products operate as both a high-power receiver and a transmitter enabling rapid power transfer and power sharing with FOD (Foreign Object Detection) and other important ST-proprietary safety IPs.
ST’s proprietary high-voltage technology, paired with excellent mixed signal design and highest quality assurance, enables our customers to deliver cutting-edge wireless-charging products. The STWLC68 family of highly integrated devices needs a very low external BoM (Bill of Materials), ideal for integration in a wide range of applications from small wearables and appliances to larger ones like smartphones and tablets. Being WPC Qi 1.2.4 compliant, the STWLC68 is fully compatible with all Qi certified devices in the market

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.