BQ79616-Q1: Consequences of an Internal MOSFET Short

Batuhan Yavasoglu

Part Number: BQ79616-Q1
Other Parts Discussed in Thread: BQ79616

Hello TI Support Team,

I am currently in the process of designing a Battery Management System (BMS) utilizing the BQ79616 IC. I have a specific concern I'd like to address:

If one of the internal MOSFETs of the BQ79616 IC were to get shorted, what would be the potential outcomes or consequences? Is there any built-in protection mechanism or indicator for such an event?

Your insights will greatly assist in ensuring the safety and reliability of my design.

Thank you in advance for your assistance.

Best regards,

Batuhan

over 1 year ago

+1 Benjamin Luty over 1 year ago

TI__Expert 6770 points

Batuhan,

To protect the MOSFETs the MCU can look at the DIAG_AUX_HI/LO registers, detailed in section 9.3.6.4.6.3 of the datasheet. Refer to that section for specifics about how to protect the MOSFETs.

A short in the MOSFET would appear in that diagnostics, and failing to take action quickly after a short is reported could prevent the associated cell from being balanced or charged in the future.

Regards,

Ben

0 Batuhan Yavasoglu over 1 year ago in reply to Benjamin Luty

Prodigy 220 points

Thank you for your response

Power management

Power management forum

BQ79616-Q1: Consequences of an Internal MOSFET Short