BQ27426: About GPOUT for exit shutdown

Leonardo Sandler

Part Number: BQ27426

Hi,

In the datasheet of the bq27426, in the pins description, We see the following sentence:

"It is recommended to connect GPOUT to a GPIO of the host MCU so that in case of any
inadvertent shutdown condition, the gauge can be commanded to come out of SHUTDOWN."

Can you clarify what it means "inadvertent shutdown"?

Can the device get into shutdown mode unexpectedly, independently?

How the system can detect that the bq27426 is in shutdown mode?

Thanks,

Leonardo

9 months ago

0 Robert 9 months ago

TI__Genius 17066 points

Hello Leonardo,

Please see the following image taken from the BQ27426 TRM for when the gauge goes into SHUTDOWN mode.

Regards,

Jonny.

0 Leonardo Sandler 9 months ago in reply to Robert

Prodigy 160 points

Hi Jonny,

Thanks for your answer.

But we are concerned about the inadvertent shutdown event.

This refers to an abnormal and unexpected functional situation in which the device goes to shutdown by itself?

Thanks,

Leonardo.

0 Robert 9 months ago in reply to Leonardo Sandler

TI__Genius 17066 points

Hello Leonardo,

This inadvertent shutdown event is when the device unexpectedly meets the shutdown requirements and enters shutdown mode.

Regards,

Jonny.

Power management

Power management forum

BQ27426: About GPOUT for exit shutdown