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

[Kombo]

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]

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.

[Kombo]

I managed to get it working I replaced a few components around the tank circuit and it came to life. Here is a screen shot. I was hoping to be pulling a bit more juice, Been having my phone on it for a while now.

[Ahsan_4021]

Glad to hear it's working! I'm currently designing the STEVAL-WBC2TX50 as well, but I only have the PDF schematics from https://components101.com/sites/default/files/2024-05/steval-wbc2tx50-datasheet.pdf, with no design files or BOM available. Additionally, there are no details available over STM or online. Could you please share your reference design, schematics, or BOM? Any details you can provide would be really helpful!

[Kombo]

Hi Ahsan_4021

I used the user manual document I have attached. It was very helpful.

Regards

Kombo