BQ76952: Issues related to MOSFET Control.

Vaithieswaran S

Part Number: BQ76952

Greetings,

I was using a test board (BQ76952EVM ) with STM32L431RC microcontroller, with Bq76952 IC by tapping the SCL and SDA pins from the external I2C header of the BQ76952EVM evaluation module. I would like to control each and every MOSFET separately like DSG, CHG, PDSG, and PCHG. I have written in 0x0097 register to control .but able to force turn off the CHG and PCHG MOSFET. Can you please tell me the correct register as well as the data that need to be sent for the command

Regards

Vaithieswaran.S

over 3 years ago

0 Matt Sunna over 3 years ago

TI__Guru* 81034 points

Hi Vaithieswaran,

This previous thread may help answer your question: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1051647/bq76942-write-fet_control-under-i2c The FETs controls are not completely independent. For example, you cannot enable PCHG and CHG at the same time. Or if the protections are triggered, they will still disable the FETs.

Best regards,

Matt

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BQ76952: Issues related to MOSFET Control.