50W high-power wireless charging boards target industrial, medical, and smart home applications

STMicro has introduced a combo of 50W wireless charging transmitter and receiver boards, namely the STEVAL-WBC2TX50 transmitter board and the STEVAL-WLC98RX receiver board, for the development of high-power wireless charging solutions such as medical and industrial equipment, home appliances, and computer peripherals.

The transmitter board, based on the STWBC2-HP transmitter system-in-package (SiP), supports up to 50W of output power using the STMicro’s proprietary Super Charge (STSC) protocol, as well as the Qi 1.3 5W Baseline Power Profile (BPP) and 15W Extended Power Profile (EPP). The receiver board, based on the STWLC98 wireless power receiver IC, can handle up to 50W charging power through STSC, supports Qi BPP and EPP charging, and implements features such as Adaptive Rectifier Configuration (ARC) to extend charging distance by up to 50% and accurate voltage and current measurement for Foreign Object Detection (FOD).

STMicro wireless charging boards
Transmitter board with antenna (left) and receiver board (right)

STEVAL-WBC2TX50 transmitter board highlights:

  • STWBC2-HP wireless power transmitter chip
    • MCU – STM32G071 Arm Cortex-M0 microcontroller
    • Application-specific front end that 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
  • USB Power Delivery
  • Compatible with STSAFE-A110 secure element to provide Qi authentication.
  • Synchronous boost DC-DC converter to supply the bridge
  • On board full bridge inverter
  • Rx presence detection based on coil Q factor measurement
  • Foreign object detection (FOD) function
  • On-chip thermal management and protections
  • SWD + UART combined connector
50W wireless charging transmitter board
STEVAL-WBC2TX50 transmitter board

STEVAL-WLC98RX receiver board features:

  • STWLC98 wireless power receiver IC
    • MCU – Arm Cortex-M3 core
    • Integrated high-efficiency synchronous-rectifier power stage with programmable output voltage up to 20V.
  • Qi 1.3 compliant wireless receiver
  • Extended power profile (EPP) delivers up to 15 W
  • ST Super Charge (STSC) protocol support delivers up to 50 W
  • Low voltage drop regulator with output current limit and input voltage control
  • Adaptive rectifier configuration (ARC) mode for enhanced spatial freedom
  • Accurate voltage/current measurement for foreign object detection (FOD)
  • On-chip thermal management and protections

Both boards come with a Declaration of Conformity to the EU Radio Equipment Directive (RED).

50W wireless charging receiver board
STEVAL-WLC98RX receiver board

The STEVAL-WLC98RX receiver board can be configured with the STSW-WPSTUDIO program, while designers can use the STSW-WBC2STUDIO program for the STEVAL-WBC2TX50 transmitter board. Both provide a GUI interface with real-time monitoring of key internal parameters over UART or USB interfaces and wizards to simplify otherwise complex tasks such as FOD (foreign object detection) and custom coil design.

STSW-WPSTUDIO
STSW-WPSTUDIO

In practical terms, the 50W wireless charging kit will enable the development of high-power wireless charging applications such as vacuum cleaners, cordless power tools, drones, mobile robots, medical drug delivery devices, portable ultrasound systems, stagelighting and mobile lighting, printers, and scanners.

Pricing starts at $113.93 for the STEVAL-WLC98RX receiver and $109.03 for the STEVAL-WBC2TX50 transmitter. Further details may be found on the respective product pages and in the press release.

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