STMicroelectronics Launches New Wireless-Charging Boards

STMicroelectronics has launched a 50W, Qi-compatible transmitter and receiver combination to facilitate the development of wireless charging solutions for high-power applications in sectors like medical and industrial equipment, home appliances, and computer peripherals.

With ST’s new wireless-charging technology, developers can integrate the benefits of wireless charging—convenience and speed—into applications requiring higher power and shorter charging times. These applications include vacuum cleaners, cordless power tools, drones, mobile robots, medical drug delivery devices, portable ultrasound systems, stage lighting, mobile lighting, printers, and scanners. Eliminating the need for cables, connectors, and complex docking systems, these products can become more straightforward, cost-effective, and durable.

The STEVAL-WBC2TX50 transmitter board delivers up to 50W of output power using ST’s Super Charge (STSC) protocol, a proprietary system designed for faster wireless charging than standard protocols. It supports the Qi 1.3 5W Baseline Power Profile (BPP) and 15W Extended Power Profile (EPP). Central to its functionality is ST’s STWBC2-HP transmitter system-in-package, which integrates an STM32G071 Arm® Cortex®-M0 microcontroller and a specialized front end for signal conditioning, frequency control, and a high-resolution PWM generator to drive the transmitter. It operates with any DC voltage from 4.1V to 24V and includes MOSFET gate drivers and a D+/D- interface for USB Power Delivery. Additionally, it can pair with ST’s STSAFE-A110 secure element for Qi authentication.

The STEVAL-WLC98RX receiver board is designed to handle up to 50W charging power, supporting the full STSC capability, along with BPP and EPP charging. It features Adaptive Rectifier Configuration (ARC) to extend charging distance by up to 50%, enabling the use of lower-cost coils and more flexible setups. It also provides accurate voltage and current measurement for Foreign Object Detection (FOD), thermal management, and system protection. The board utilizes ST’s STWLC98 wireless power receiver IC, which includes a Cortex-M3 core and an integrated high-efficiency synchronous-rectifier power stage with a programmable output voltage up to 20V.

ST offers dedicated software tools—STSW-WPSTUDIO for the STEVAL-WLC98RX and STSW-WBC2STUDIO for the STEVAL-WBC2TX50—to adjust configuration parameters and customize device operation. Comprehensive design documents are also available to support development.

The transmitter and receiver boards are compliant with the EU Radio Equipment Directive (RED) and are available from the ST eStore and distributors. Pricing starts at $113.93 for the STEVAL-WLC98RX receiver and $109.03 for the STEVAL-WBC2TX50 transmitter.