STEVAL-ISB047V1: Qi Certified 3-Coil 15W Wireless Charger

The STEVAL-ISB047V1 wireless charger evaluation kit includes the STEVAL-ISB047V1T transmitter reference design board and an STEVAL-WBCDNGV1 USB-to-UART dongle for PC communication.

The STEVAL-ISB047V1 is based on an MP-A15 3-coil topology, with a sepic DC-DC stage supplying a half bridge inverter operating at 127.7 kHz fixed frequency, for compatibility with proprietary fast charge modes of popular smartphones.

The STEVAL-ISB047V1 is designed to accept a 15 W, 5 to 20 V input as per the USB type-C™ power delivery specification, or limit the input to 5 W if supplied by legacy 5 V USB chargers.

The STEVAL-ISB047V1T is certified under WPC 1.2.4 EPP specification, thus interoperable with all Qi-certified receivers, including mobile phones, cases and power banks, and supports resistive and capacitive modulation. The transmitter is capable of 15 W potential power Qi EPP bi-directional communication and is backward compatible with 5 W BPP receivers.

The STWBC-MC controller monitors and drives the STEVAL-ISB047V1T transmitter, including the digital DC/DC controller that regulates the transmitted power. The controller supports automatic coil selection based on the best coupling with the receiver, as well as a patented Q-factor measurement for accurate foreign object detection (FOD). You can communicate with the controller via UART, and monitor the behavior of the transmitter on your PC using the STSWSTWBCGUI graphical interface