industry news
Subscribe Now

STMicroelectronics Boosts Wireless Charging Speed, Efficiency, and Flexibility with 70W High-Power Chipsets

Geneva, September 20, 2021 – STMicroelectronics’ STWLC98 integrated wireless power receiver delivers faster 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 70W on the receiver end at high system efficiency.

The STWLC98 can fully charge today’s high-end smartphones, which contain high-capacity batteries, in just under 30 minutes. In addition, the new device extends opportunities for ultra-fast and convenient charging, free of cables, sockets, and restrictive connections, to a host of new applications and contexts. Moreover, contactless charging lets product creators simplify enclosure designs, reducing cost and complexity while encouraging new slimline styles and eliminating problems associated with the socket such as contamination.

Compliant with the Qi EPP 1.3 wireless-charging standard commonly used in the smartphone industry, the STWLC98 is managed by a 32-bit Arm® Cortex®-M3 core that supports a range of rich features including built-in protection; it comes with an embedded OS that simplifies Qi 1.3 standalone certification. On the transmitter side, the STWBC2-HP can work with ST’s STSAFE-A110 secure element to store official Qi Certificates and provides authentication that leverages state-of-the-art cryptography. Support for the Company’s innovative ST Super Charge (STSC) protocol enables fast charging up to the maximum power-transfer rate of 70W.

The STWLC98 features ST’s proprietary Adaptive Rectifier Configuration (ARC) mode that 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 optimization. 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 patented fast PID loop and also supports the STSC protocol.

ST’s new 70W 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 on-board the vehicle.

With built-in power management, the STWLC98 has an energy-saving ultra-low-power standby mode while total end-to-end charging system efficiency can exceed 90%, thereby complying with stringent eco-design targets. The power charger chip features dedicated hardware and advanced algorithms that were developed to address challenges in ASK and FSK communication during high power delivery. Safety features include foreign object detection (FOD), which leverages high-accuracy current-sense IP, Q-factor detection, and robust communication between transmitter and receiver

As an additional feature that gives users extra flexibility, the STWLC98 can also operate in high-efficiency transmitter mode to allow high-power charge sharing between devices. This is coupled with the STWLC98’s industry-first embedded Q-factor detection in a receiver device to ensure safe operation in transmitter mode.

Users of ST’s wireless power solutions can download and benefit from the free PC-based graphical tool, ST Wireless Power Studio, to accelerate design-in and simplify processes including calibrating FOD, tuning Q-factor detection, and communication diagnostics.

Both devices are in high-volume mass production. The STWLC98 is packaged as a 4.3mm x 3.9mm 90-bump 0.4mm-pitch WLCSP, priced from $2.60. The STWBC2-HP is available in 8mm x 8mm VFQFPN 68-pins 0.4mm-pitch package from $3.30. Please contact your local ST sales office for sample requests and further pricing options.

For further information please go to

Leave a Reply

featured blogs
Oct 26, 2021
We unpack the demanding PPA requirements for edge AI SoCs, as chip designers turn their attention to edge AI applications such as embedded vision systems. The post Smarter Ways to Meet Your PPA Targets for Edge AI Processors appeared first on From Silicon To Software....
Oct 26, 2021
Component placement is one of the most critical aspects of PCB designing. As the number of components and layers increases, the complexities of placing components increase manifold. Allegro® PCB... [[ Click on the title to access the full blog on the Cadence Community s...
Oct 20, 2021
I've seen a lot of things in my time, but I don't think I was ready to see a robot that can walk, fly, ride a skateboard, and balance on a slackline....
Oct 4, 2021
The latest version of Intel® Quartus® Prime software version 21.3 has been released. It introduces many new intuitive features and improvements that make it easier to design with Intel® FPGAs, including the new Intel® Agilex'„¢ FPGAs. These new features and improvements...

featured video

Simplify building automation designs with MSP430

Sponsored by Texas Instruments

Smart building automation requires simple, flexible designs. With integrated, high-performance signal chain, MSP430 MCUs can enable high-accuracy motion detection, sensing and motor control to take performance and efficiency to the next level.

Click here for more information

featured paper

How to Design with Maxim’s Latest Supervisors

Sponsored by Maxim Integrated (now part of Analog Devices)

As the technologies in MCUs, µPs, DSPs, and FPGAs move toward lower geometries and power, operational voltages become significantly low for these devices. Reducing the core voltage poses challenges in the use of high-accuracy power supply and voltage supervisors to avoid system failure. This application note discusses the critical parameters Maxim’s MAX16132–MAX16135 supervisor family and presents a reasonable approach in choosing the right reset threshold and hysteresis for voltage supervisor ICs.

Click to read more

featured chalk talk

TI Robotics System Learning Kit

Sponsored by Mouser Electronics and Texas Instruments

Robotics projects can get complicated quickly, and finding a set of components, controllers, networking, and software that plays nicely together is a real headache. In this episode of Chalk Talk, Amelia Dalton chats with Mark Easley of Texas Instruments about the TI-RSLK Robotics Kit, which will get you up and running on your next robotics project in no time.

Click here for more information about the Texas Instruments TIRSLK-EVM Robotics System Lab Kit