‎2021-02-02 04:47 AM
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...​
Solved! Go to Solution.
‎2021-02-24 03:38 AM
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
‎2021-02-02 08:33 AM
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
‎2021-02-03 10:01 PM
It looks like that via is the only connection from V+ to the FET Pads.
‎2021-02-09 01:36 AM
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.
‎2021-02-09 02:01 AM
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...
‎2021-02-09 02:15 AM
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
‎2021-02-24 03:38 AM
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
‎2021-02-24 04:22 AM
Thank you for your reply! Glad I could help.
‎2021-03-14 01:55 PM
@Giuseppe Scuderi_O​ could you please clarify if this an issue limits the max motor current ( for the board revision sold until end of Jan 2021).
br
daniele
‎2021-03-15 01:38 AM
Hi,
you can use it at full load without issues.
BR
G.