BQ76952: Balancing command issue ?

Hello Sourabh,

Can you explain more in detail what you mean that the command is working in one hardware variant and not in the other? Did you configure both devices in the same way? Section 4 Considerations for a Host-Balancing Algorithm in the Cell Balancing with BQ769x2 Battery Monitors application note may also be useful to follow.

Best Regards,
Alexis

Hi Alex,

Yes, Both the devices are configured in same way. No change in the software. 

Shall I send you the I2C logic analyzer trace of both these devices for the sent command ?

Hello Sourabh,

Please do. That may help in giving more insight on what’s happening.

Best Regards,
Alexis

This is the link to I2C traces of the balancing command(0x0083) sent from microcontroller to AFE

The folder (Working) and (Not Working) has two traces each. 

In Working the external cell balancing circuit works and balancing is happening while in case of Not Working, balancing does not work.

https://drive.google.com/drive/folders/1ojrpqDN4b9nx_vbKIjy1WYtlh58NWPIA?usp=sharing

Hello Sourabh,

We cannot access Google Drive unfortunately to view what you have shared. Can you please share it through a zip file instead?

Best Regards,
Alexis

I am unable to upload a zip file here. It is prompting to share a link.

Zip file link - drive.google.com/.../view

Hello Sourabh,

Are you able to click on the 'upload' button highlighted below? This allows you to upload from your PC's drive without having to use a link. We unfortunately cannot access Google Drive to view what you have shared. 


Best Regards,
Alexis

I2C trace Balancing Command.zip

Here you go. Sorry, I couldn't see the upload icon earlier !

Hello Sourabh,

We are in U.S. holidays, expect a response by early next week.

Best Regards,

Luis Hernandez Salomon