BQ33100: GROUND REFERENCE

Vishnu V

Part Number: BQ33100

Hi team,

I am using BQ33100 in my design. I referred the datasheet and found there are two grounds used in the reference schematic. Can anyone help in understanding why it is used. Also attaching snippet of the same.

Thanks & Regards,

Vishnu V

over 1 year ago

0 Wyatt Keller over 1 year ago

TI__Guru** 105770 points

Hello Vishnu,

In order to measure current we need to have two separate ground references separated by a sense resistor. The gauge i tied to battery ground, and the system is tied to PACK- which is the system ground. That way we can capture all passed charge.

Sincerely,

Wyatt Keller

0 Vishnu V over 1 year ago in reply to Wyatt Keller

Intellectual 304 points

Thanks Wyatt.

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BQ33100: GROUND REFERENCE