Hello, I am reaching out for assistance regarding a wireless charging prototype I have developed based on the STEVAL-WBC2TX50 wireless power transmitter evaluation board.
Here are the key details of my project:
Design and Assembly
- I followed the schematics, PCB layout, and reference designs provided in the UM3231 user manual.
-All components were sourced according to the BOM, including the STSAFE-A110 chip.
-I successfully assembled the PCB and flashed the firmware into the STWBC2-HP chip
Current Issue
The wireless charger is not charging my Qi 1.3-compliant device (iPhone 11).
When powered up and connected to the STSW-WBC2STUDIO GUI, the system remains in the WAIT State, with the PING_TIMEOUT event continuously logged.
The Presence Detection values fluctuate, and the Bridge Voltage remains at 4.8 V, indicating that power transfer is not initiating.
Suspected Issue:
I suspect the issue may be related to the STSAFE-A110 chip, as it appears that the chip needs to be provisioned with a Qi certificate chain to work with commercial devices like the iPhone 11.
I am unsure if the STSAFE chip is the root cause or if there are other issues with my design or firmware configuration.
Request for Assistance:
Could you please guide me on how to provision the STSAFE-A110 chip with the necessary Qi certificate chain?
Are there additional steps or configurations required beyond assembling the PCB and flashing the firmware to make the system operational?
If the STSAFE chip is not the issue, could you provide guidance on troubleshooting the design or firmware?
I am happy to provide additional information, such as screenshots from the GUI or further details about my setup, to assist in diagnosing the issue.
Thank you for your support, and I look forward to your response.
Regards
Kombo
