BQ76952: bq76952 can not enter sleep when the DFET is off

sheng liu

Part Number: BQ76952

Hello TI Team,

I am trying to enter into sleep mode in BQ7695202 when the DFET is control off by DFETOFF pin. I have also set the necessary registers according to the attachment.

BQ76952-LFP-12S3P-1mR-01-20230217.gg.csv

over 2 years ago

sheng liu over 2 years ago

Prodigy 40 points

The following is the sleep state of the battery when the DFETOFF is pulled low and the DFETOFF is high

the left figure shows the bq76952 active when the DFETOFF is not pull down, the right one show the bq7695202 sleep when the DFETOFF is pull down.

Matt Sunna over 2 years ago in reply to sheng liu

TI__Guru* 81035 points

Hi Sheng,

I tested this on my board. You are correct, disabling the discharge FET with the DFETOFF pin does prevent the device from going into SLEEP mode. If you disable the DSG FET with the DSG_PDSG_OFF() command, it will not prevent SLEEP mode, so this might be a better option for you.

Best regards,

Matt

sheng liu over 2 years ago in reply to Matt Sunna

Prodigy 40 points

hello Matt；

Thank you for your reply. We can send DSG_ PDSG_ OFF() command while controlling DFETOFF PIN.

Power management

Power management forum

BQ76952: bq76952 can not enter sleep when the DFET is off