BQ77904: BQ77904

Bilal Manai

Prodigy 30 points

Part Number: BQ77904
Other Parts Discussed in Thread: BQ77915, BQ76920

Hello,

I want to built a 4 series Li-Ion battery pack and I need a protection & balancing circuit at the same time.

The BQ77904 seems to be able do the protection, but are there any part number to do the balancing or to do both ?

Thanks,

over 5 years ago

0 David Hien over 5 years ago

TI__Genius 10830 points

hi Bilal,
For protection & balancing for a 4s pack, please look at bq77915.
it is our most recent device.

0 Bilal Manai over 5 years ago in reply to David Hien

Prodigy 30 points

Great !
Any reference design with this part number ?

0 David Hien over 5 years ago in reply to Bilal Manai

TI__Genius 10830 points

Hi Bilal,

Sure. Please find the info here.

You will find also some videos under "Support & Training".

0 Bilal Manai over 5 years ago in reply to David Hien

Prodigy 30 points

Hi David,

Seems to be a design ref for cc-cv charger, but interesting to know that exist.

I also found the BQ76920, what are main differences with BQ77915 ?

Thanks, Bilal

0 David Hien over 5 years ago in reply to Bilal Manai

TI__Genius 10830 points

hi Bilal,
The bq76920 device is an analog front-end (AFE) device which serves as part of a complete pack monitoring and protection solution
The bq77915 device is a low-power battery pack protector that implements a suite of voltage, current, and temperature protections and a smart cell balancing algorithm without microcontroller (MCU) control.

Power management

Power management forum

BQ77904: BQ77904