Geneva – Touted as the industry’s first customizable wireless battery charger (WBC) controller, STMicroelectronics has introduced the STWBC digital controller for WBC transmitters, which controls power transfer from a WBC transmitter (TX) to a receiver (RX) in WBC-enabled phones, wearables, and other battery-powered devices that use electromagnetic induction for re-charge. The devices offer full compatibility with the Qi Wireless Power Consortium and the PMA (Power Matters Alliance) wireless-charging protocols. ST is one of the first companies that hold certification for the Qi 1.1.2 A11 standard.
The STWBC, housed in a VFQFPN32 package, is able to precisely control the amount of transmitted power to match the requirements of the receiving unit in terms of maximizing the efficiency of the power transfer and minimizing any increase in operating temperature, said ST. In addition, the digital feedback between TX and RX units allows the detection of metal objects close to the receiver (foreign object detection FOD) that could result in potential hazards, enabling the STWBC to stop power transmission when those objects are detected.
Key features include:
- Multiple Qi and PMA standards support
- Qi 1.1.2 A11-certified
- Up to 5W power capability for mobiles, wearables, remote controls
- Native support for half-bridge and full-bridge topologies
- 5-V operating voltage
The STWBC provides firmware options that enable customers to personalize their end product without the need of external microcontrollers via:
- A turn-key Qi 1.1.2 A11 certified solution (reference design board STEVAL-ISB027V1), fully interoperable with Qi-enabled mobile phones
- API (application programming interface) access to customize the underlying firmware
Support includes the Qi 1.1.2 A11-certified reference design board (STEVAL-ISB027V1), API libraries and documentation to develop software customizations, as well as a graphical user interface to monitor real-time performance and diagnostics.
Availability: Available in full production.
Pricing: $3.00 in quantities of 1,000.