ST STDES-50W2CWBC Technical Notes

Introduction
The STDES-50W2CWBC dual-coil reference design is based on the
transmitter. It supports two coils, which could work alternatively to increase the Rx positioning freedom. The solution supports
Qi EPP-compliant mode up to 15 W, featuring an ST proprietary protocol. It can also support 50 W or an even higher wireless
power transfer.
The embedded STWBC2-HP
• three pairs of half-bridge gate drivers
• a dedicated DC-DC controller that supports buck, boost, and buck-boost topologies
• high-performance Q-factor detection hardware
• a high-resolution main PWM controller
• a dedicated Qi communication modulator and demodulator
• a USB-PD controller
• a buck DC-DC
• a charge-pump
The STDES-50W2CWBC is a fully assembled reference design developed for performance evaluation only, not available for
sale.
To achieve the best performance, carry out some procedures before finalizing the application.
This document summarizes the following fundamental steps:
• power supply test
• firmware downloading test
• power-on LED status check
• parameter setting test
• presence detection test
• power transfer switching test
• ST super charger (STSC) protocol test
• ASK demodulation test
• Q-factor accuracy test
TN1399 - Rev 1 - March 2022
For further information contact your local STMicroelectronics sales office.
integrates the following main components:
STDES-50W2CWBC test report
STWBC2-HP Qi-compliant, inductive wireless charger
TN1399
Technical note
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