BQ28Z610: bq28z610

Christopher Paul

Part Number: BQ28Z610
Other Parts Discussed in Thread: BQ40Z50

I have an application using the bq28z610 in a 1S mode of operation in which the AltManufacturerAccess() 0x0010 SHUTDOWN Mode is sent twice at the last stage of pack manufacture.

I am interested in:

the minimum voltage and current that need to be applied to the pack pins to wake up the gauge, and

the maximum time after application of this signal that the gauge will activate the protection MOSFETs and I can measure the cell voltage on the pack pins.

over 3 years ago

0 Christopher Paul over 3 years ago

Prodigy 90 points

Also, will the MOSFETs remain activated indefinitely if the wake-up signal is removed and no further commands are sent?

0 Wyatt Keller over 3 years ago in reply to Christopher Paul

TI__Guru** 105770 points

Hello Chris,

The BQ28Z610 should have a similar startup method as the BQ40Z50, there is an FAQ page that describes this: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1106903/faq-how-long-does-the-voltage-on-the-pack-pin-need-to-be-applied-to-wake-up-the-gauge

The MOSFETs will remain active as long as all the protections you have configured do not trip, once you wake up the gauge it will be checking what the configuration is in Mfg Status Init register, if it is FET_EN = 1 then firmware will be in control. If it is 0 then the FETs should remain off until manually toggled.

The section in the TRM to setup the flash. At startup it will set these value to the gauge: 13.3.6 Manufacturing

Sincerely,

Wyatt Keller

Power management

Power management forum

BQ28Z610: bq28z610