BQ77908A: BQ77908A

Tayyar Esiyok

Part Number: BQ77908A
Other Parts Discussed in Thread: BQ76942

Hi.

When we examine the datasheet of this integrated circuit, we see that it is the I2C serial communication protocol. We only want to read the cell voltages from this integrated circuit, we could not understand which addresses we can use to get these values via I2C.

Mail adress : esiyoktayyar81@gmail.com

9 months ago

0 Maxwell Verboncoeur 9 months ago

TI__Mastermind 20670 points

Hi Tayyar,

This device is not able to read out cell voltages from the I2C bus. The serial communications are only for device configuration.

I recommend looking into the bq76942, which is a higher accuracy battery monitor with integrated cell balancing and the ability to read battery information (cell voltages, pack current, etc.) via the I2C interface.

Regards,

Max Verboncoeur

0 Tayyar Esiyok 9 months ago in reply to Maxwell Verboncoeur

Prodigy 40 points

Yes, this integrated will work for us. I went to the shipping step and I will buy. How many days does the international economy - TR (Turkey) shipping time take?

0 Maxwell Verboncoeur 9 months ago in reply to Tayyar Esiyok

TI__Mastermind 20670 points

Hi Tayyar,

I'm not sure what the usual shipping time is, but you should be able to get an estimate from the shipping provider using the order's tracking number.

Regards,

Max Verboncoeur

0 Tayyar Esiyok 9 months ago in reply to Maxwell Verboncoeur

Prodigy 40 points

Using two BQ76942s, can we increase the total number of cells to 20 cells by isolating the communications?

0 Maxwell Verboncoeur 9 months ago in reply to Tayyar Esiyok

TI__Mastermind 20670 points

Hi Tayyar,

Yes, you can do that. I recommend looking at TIDA-010247 for reference, which implements the bq76942 in a stacked configuration with isolated communications.

Regards,

Max Verboncoeur

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BQ77908A: BQ77908A