STMicroelectronics STWLC98 and STWBC2-HP high-power chipset

Click2Contact

STMicroelectronics’ STWLC98 integrated wireless power receiver delivers fast wireless charging and flexible charge sharing for diverse portable and mobile devices for home, office, industry, healthcare and in-car applications. When combined with the STWBC2-HP transmitter IC, the complete transmitter–receiver system can deliver up to 70 W on the receiver end at high system efficiency.

The STWLC98 can fully charge high-end smartphones, which contain high-capacity batteries, in under 30 min. In addition, the device extends opportunities for ultrafast and convenient charging, free of cables, sockets and restrictive connections, to a host of applications and contexts.

Compliant with the Qi EPP 1.3 wireless-charging standard, the receiver is managed by a 32-bit Arm Cortex-M3 core that supports a range of rich features including built-in protection, and comes with an embedded OS that simplifies Qi 1.3 standalone certification. It also features ST’s Adaptive Rectifier Configuration (ARC) mode, which enhances the ping-up and power transfer spatial freedom of the system in both horizontal and vertical directions without any change in hardware or coil optimisation. Enabling ARC mode, which transforms the whole surface of the transmitter as usable charging area, increases the ping-up distance by up to 50% in all directions.

The STWLC98 works directly with the STWBC2-HP, which contains a USB-PD interface, digital buck/boost DC/DC converter, full-bridge inverter, three half-bridge drivers, and voltage, current and phase sensors. Controlled by a Cortex-M0+ core, the STWBC2-HP executes a fast PID loop and supports the ST Super Charge (STSC) protocol, enabling fast charging up to the maximum power-transfer rate of 70 W. It can work with ST’s STSAFE-A110 secure element to store official Qi Certificates and provides authentication that leverages state-of-the-art cryptography.

The 70 W wireless-charging chipset creates a scalable solution that can be deployed in devices like smartphones, tablets, laptops, power banks, True Wireless Stereo (TWS) devices, Bluetooth speakers and AR/VR headsets. Designers can also extend fast and convenient wireless-charging to medical equipment like monitors and medicine pumps, as well as cordless power tools, mobile robots, drones and e-bikes. The chipset is also suited to automotive applications including in-cabin charging solutions and wireless charging of various modules onboard the vehicle.

For more information: www.st.com/wireless-charger.