ST Gears Development of Wireless Charging, Handles up to 50W Charging Power

STMicroelectronics has accelerated the development of wireless charging for high-power applications, including computer peripherals, household appliances, and industrial and medical equipment, by introducing a 50W Qi-compatible transmitter and receiver combo.

Innovators may take advantage of the speed and ease of wireless charging in applications that require a greater power and shorter charge interval by utilizing ST’s innovative wireless-charging solution.

The STEVAL-WBC2TX50 Transmitter Board Is Capable Of Delivering:

• Up to 50W of output power using the ST Super Charge (STSC) protocol.
• STSC is ST’s proprietary protocol for wireless charging at a faster rate than the standard protocols used with smartphones and similar devices.
• Allows quicker recharging of larger batteries.
• The board also supports the Qi 1.3 5W Baseline Power Profile (BPP) and 15W Extended Power Profile (EPP).
• The main component on-board is ST’s STWBC2-HP transmitter system-in-package.
• Combines an STM32G071 Arm Cortex-M0 microcontroller and an application-specific front end.
• The front end provides signal conditioning and frequency control.
• A high-resolution PWM generator to drive the transmitter, and operates with any DC voltage from 4.1V to 24V.
• It also contains MOSFET gate drivers and a D+/D- interface for USB Power Delivery.

In addition, the STWBC2-HP SiP can work with ST’s STSAFE-A110 secure element to provide Qi authentication.

The STEVAL-WLC98RX receiver board is built to handle up to 50W charging power, to safely accommodate the full STSC capability as well as BPP and EPP charging.

Features include support for Adaptive Rectifier Configuration (ARC), which extends charging distance by up to 50% to allow lower-cost coils and more flexible configurations. Accurate voltage and current measurement for Foreign Object Detection (FOD), thermal management, and system protection are also provided.

This board uses ST’s STWLC98 wireless power receiver IC, which contains a Cortex-M3 core and an integrated high efficiency synchronous-rectifier power stage with programmable output voltage up to 20V.

Dedicated software tools, ST’s STSW-WPSTUDIO for the STEVAL-WLC98RX and STSW-WBC2STUDIO for the STEVAL-WBC2TX50 are available to modify the configuration parameters, tailoring the operation of the device to the needs of customized applications. A comprehensive set of design documents is also available to assist development.

Key Applications Include:

Vacuum cleaners, cordless power tools, portable ultrasound systems, medicinal medication delivery devices, drones and other mobile robots, stage lighting and mobile lighting, printers, scanners, and mobile lighting are a few examples of these uses. When these items are devoid of wires, connections, and intricate docking configurations, they might become more straightforward, reasonably priced, and durable.

Availability and Pricing

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