Custom Wireless Charger Based on STEVAL-WBC2TX50 - Qi compatibility?

Kombo · ‎2025-03-11

Dear STMicroelectronics Support Team,

I have built a custom wireless charger based on the STEVAL-WBC2TX50 evaluation board, following the provided BOM and schematics.

I successfully flashed the STSW-WBC2FW_V1300 firmware into the STWBC2-HP controller chip and connected to the STSW-WBC2STUDIO GUI to monitor system behavior.

I understand that Qi 1.3 devices will not charge due to authentication requirements. However, I would like to confirm whether I should be able to charge Qi 1.2 and older devices (e.g., iPhone 11) since they do not require authentication. If I should be able the charge Qi1.2 devices, this suggests an underlying hardware issue in my design.

Currently, the GUI event window continuously shows "ping_timeout" errors, as seen in the attached screenshot.

Could you please provide guidance on potential causes and troubleshooting steps to resolve this issue?

Thank you for your support.

willzhou · ‎2025-03-28

It can be able to charge Qi 1.2 and older devices (e.g., iPhone 11).
From your picture it seems do not find any rx, so it show "PING TIMEOUT".

How about you use PD adapter for STWBC2 power and try again.

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