3 Overview of the board
The STEVAL-WBC2TX70 evaluation board is optimized for performance. The board features:
• STWBC2 wireless power transmitter chip
• Optimized BOM and PCB space
• On board full bridge inverter
• 32-bit, 64 MHz Arm® Cortex® M0+ microcontroller with 32 KB SRAM
• 8-channel, 12-bit A/D converter
• On-chip thermal management and protections
• Rx presence detection based on coil Q factor measurement
• Foreign object detection (FOD) function
• Onboard STSAFE chip with test certificate (certificate is mandatory in Qi 1.3 and later)
• STLINK + UART combined connector
• Two LEDs to indicate the status
• Fan support
• Package VFQFPN68L 8x8 mm pitch 0.4, ROHS compliant
Figure 2. Board overview
• Series resonant capacitors (Ctank) and the transmitting coil form a resonant circuit. This circuit is in charge
of transmitting the power signal, so any components/tracks involved should be rated accordingly.
• Power supply can be provided from fixed voltage supply to barrel jack or from USB PD to USB Type-C®
connector. If USB PD is used, the device is capable to request for up to 20 V.
• The DC-DC boost converter can raise the bridge voltage for a smoother regulation.
• For ASK demodulation, the ring voltage and current is sensed. Only the filters and current sensing resistor
are necessary. The rest is implemented inside the chip.
UM3286
Overview of the board
UM3286 - Rev 1
page 4/84
To Next Page
Loading...
Need help?
General
