B-G431B-ESC1 Layout Question (Via Current)

[FKL]

Hello,

I have had a look over the B-G431B-ESC1 Layout Files and found that the High Side FETs are connected to V+ with a single Via.

The brown layer is V+, the large red pad is where the FET Drain is connected.

I can only see the single via i marked. The production files state the same.

This via can only carry about 1A of current, so this is definitely a design flaw.

Can you please check if there is a error in the design files I downloaded or if I am right.

@Laurent Ca...​ 

[Peter BENSCH]

The via you are pointing to is the connection of R68 to V+, who senses the bus voltages to VBUS.

But I also need to check where the other vias are.

Regards

/Peter

[FKL]

Thank you Peter.

Is there any news about this yet? Did you find internal data about the board, maybe only the public download files are incorrect/not up to date.

[Mariano Abad]

It looks like that via is the only connection from V+ to the FET Pads.

[Laurent Ca...]

Dear @FKL​ 

Could you give me the link of the layout documentation you referred in order to check consistency with internal ones?

Best regards

==

Laurent Ca...

[FKL]

Hi Laurent,

I downloaded the Altium Project files as well as the Gerber production files from this link:

https://www.st.com/en/evaluation-tools/b-g431b-esc1.html#cad-resources

There has been a new revision since I opened this thread but I checked and the 'error' is still in there ;)

Regards, Frieder

[Giuseppe Scuderi]

Dear @FKL​ ,

thanks for your feedback. We are going to fix it and we will produce a new batch of the board soon.

Best regards,

Giuseppe Scuderi

[FKL]

Thank you for your reply! Glad I could help.

[LPfit.1]

I tested this board the last two day. My Board gets extremly hot when using only 1A and 20V, some smaller drone esc dont get hot with 5A and they are even smaller. If this is true with the single via the board is pretty much useless. Is there a refund option?