stwlc38, stwbc86

lighthouse0625 · ‎2024-06-03

Hi I am working on a project using stwlc38 and stwbc86.

They charge well, but the charging distance is an issue.

I need it to be able to charge at a distance of around 2.5T, but when I go beyond 2T it won't charge.

So, I put a Tx coil like the one I used on a ready-made Tx module and tested it, and it charges up to 2.5T.

What should I improve to increase the charging distance?
Rx, Tx, Coil, or any method, please let me know if you have any suggestions. Thanks!

The product used is the 5W product

willzhou · ‎2024-06-04

Hi

For increase the charging distance, you need to change TX/RX coils

please check this AN or google "how to increase coils coupling coefficient"

https://www.st.com/resource/en/application_note/an5961-wireless-power-transfer-coil-design-stmicroelectronics.pdf

Also you can set TX input voltage larger, for example 9V.

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

View solution in original post

willzhou · ‎2024-06-04

Hi

For increase the charging distance, you need to change TX/RX coils

please check this AN or google "how to increase coils coupling coefficient"

https://www.st.com/resource/en/application_note/an5961-wireless-power-transfer-coil-design-stmicroelectronics.pdf

Also you can set TX input voltage larger, for example 9V.

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.