BQ78350-R2-DEVICE-FW: Pre-discharge on low side ?

LOIC REBOUSSIN

Expert 1620 points

Part Number: BQ78350-R2-DEVICE-FW

Hi all,

Can I'm using BQ78350-R2 with the AFE BQ769x003 and pre-discharge function on low side (N-FET on PACK-) ?

BR,

Loïc

over 6 years ago

0 Matt Sunna over 6 years ago

TI__Guru* 81034 points

Hi Loic,

Yes, this should also work.

Best regards,
Matt

0 LOIC REBOUSSIN over 6 years ago in reply to Matt Sunna

Expert 1620 points

Hi Matt,

Can you suggest a schematic diagram for that?

BR,

Loïc

0 Matt Sunna over 6 years ago in reply to LOIC REBOUSSIN

TI__Guru* 81034 points

Hi Loic,

We do not have an example schematic, but I did a quick drawing of how you could implement this. The right side shows the low side implementation - the BQ769x0 drives the CHG and DSG FETs directly and the PDSG FET is connected across the DSG FET. The gate of the PDSG FET is controlled by GPIO_B.

Best regards,

Matt

Power management

Power management forum

BQ78350-R2-DEVICE-FW: Pre-discharge on low side ?