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.

Wireless charger ICs

Advanced wireless-charger IC

ST’s new STWBC-EP supports the Qi Extended Power (15 W) profile, enabling smartphones and tablets to be charged up to three times more quickly. The device combines best-in-class energy efficiency, consuming just 16 mW in standby and able to wirelessly transfer more than 80% of the total input power, with unique features created by ST to enhance the user experience. These include a patented solution enhancing active presence detection to wake the system quickly when a compatible object is presented for charging. The patented technology also enhances the performance of Foreign Object Detection (FOD), to cut power and prevent overheating if objects containing metals are brought too close to the charger.

To help accelerate time to market for product developers, ST has created an associated reference design with a Qi 15W ready-built transmitter board and documentation to get started.

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