BQ28Z610: Is BQ28Z610 fit for project?

Jonathan Anderson

Prodigy 160 points

Part Number: BQ28Z610
Other Parts Discussed in Thread: BQ24616, BQ27742-G1,

Hello,

We are looking to use a BQ28Z610 with a bq24616

Is there any other ic that can 20ah battery capacity's 2P that also has I2C? Integrated protections optimal

Battery

mean voltage: 4.2v

cut off voltage: 2.7v

what are the sense current limits for BQ28Z610 ?

my understanding that BQ28Z610 would be need to be programmed in manufacturing before use and this can only be done via windows?

are there any drivers for BQ28Z610 for linux?

kind regards

over 5 years ago

0 Rushi_Dalal over 5 years ago

TI__Intellectual 2025 points

Hi Jonathan,

I would recommend BQ28z610-R1. For a 1S solution with integrated protection, you can also consider BQ27742-G1. Yes, once you have configured the gauge settings for your application, you would create a golden image that can be used in the production process. Let me check internally to see if we have a linux driver for BQ28z610.

Thanks,

Rushi

0 Rushi_Dalal over 5 years ago

TI__Intellectual 2025 points

Hi Jonathan,

I found out that we have developed a linux driver for BQ28z610 recently. And the team is working with the Linux team to get the driver on ti.com and in the linux kernel.

Thanks,

Rushi

0 Jonathan Anderson over 5 years ago in reply to Rushi_Dalal

Prodigy 160 points

Hey Rushi,

Thank you.

Do you have an ETA on when the driver could be available ?

Also is this the correct document https://www.ti.com/lit/an/slua801/slua801.pdf?ts=1592962618060 for flashing the guage?

kind regards

0 Rushi_Dalal over 5 years ago in reply to Jonathan Anderson

TI__Intellectual 2025 points

Hi Jonathan,

I will check with the team on a possible ETA. This guide is more for accessing the gauge data memory and modifying some configuration parameters via commands. We have a video here on gauging programming that will help you: https://training.ti.com/gauge-programming-fundamentals

Thanks,

Rushi

0 Shirish over 5 years ago

TI__Guru 57697 points

Hi Jonathan,
Please refer the code in the below link. This is the patch that was submitted for bq28z610 Linux drivers.

The above link may not be available after the patch has been reviewed/processed. After the patch is approved, the code is expected to be part of the Linux kernel.

0 Jonathan Anderson over 5 years ago in reply to Shirish

Prodigy 160 points

Hey,

Thank you, one more thing, Can S1 be fully removed?

https%253A%252F%252Fwww.ti.com%252Ftool%252FTIDA-00895

This is only required for use with Battery Management Studio? and can be done with just plugin in charge voltage?

0 Shirish over 5 years ago in reply to Jonathan Anderson

TI__Guru 57697 points

Hi,

S1 is useful for waking up the gauge. The gauge must be woken up to have communication. You are right that a charge voltage applied on pack pin will wake up the gauge..

Regards

0 Jonathan Anderson over 5 years ago in reply to Shirish

Prodigy 160 points

Hi,

Is the wake up also required to draw power from the battery?

I think a possible solution would be to add the gauge into the power logic and have it wake up with the cpu when the power button is pressed?

kind regards

0 Shirish over 5 years ago in reply to Jonathan Anderson

TI__Guru 57697 points

The gauge will wake up when it sees a load.

0 Damian Lewis over 5 years ago in reply to Jonathan Anderson

TI__Mastermind 34775 points

Hi Jonathan,

The best solution is the charger. In shutdown the FETs are open and the current wake comparator requires > 300mA to trigger wake up.

Is the CPU powered directly from the battery? Can the CPU apply a voltage > 2.45V to the PACK pin to wake the gauge up?

0 Jonathan Anderson over 5 years ago in reply to Damian Lewis

Prodigy 160 points

Hey Damian,

If system load can wake up the gauge then everything is fine?

Here's a diagram:

0 Damian Lewis over 5 years ago in reply to Jonathan Anderson

TI__Mastermind 34775 points

Hello Jonathan,

System load can't wake up the BQ28Z610 from shutdown because the protection FETs are open when device is in shutdown mode, so it won't have a connection to the cell until the gauge wakes up. Are you planning not to use the protection features of BQ28Z610? If so you will need system load > Iwake threshold.

Power management

Power management forum

BQ28Z610: Is BQ28Z610 fit for project?