BQ76972: Current+ connection based on TIDA-010247 and PMP23329 reference design

Fairuz Ahmad Naufal

Part Number: BQ76972
Other Parts Discussed in Thread: TIDA-010247, PMP23329

Tool/software:

Dear TI team,

Now, I'm designing a BMS with TIDA-010247 design reference. After I've read the schematic, I have a few questions:
1. Is BAT- connected by current+? On the high side FET, it is only available current+ under BAT+. That makes me confused how the BAT- is connected. In contrast, I see the clear BAT- and current+ connection at PMP23329 reference design.
2. Does the battery simulation (J15) relate with the J2 connector? I see the the similar pattern of that.

I hope that's clear enough and we are waiting for your response. Thanks.

1 month ago

0 Abhijith V Narayan 19 days ago

Intellectual 456 points

Hi Fairuz,

I see that the post is about a month old. Please let me know if you still have this query.

Best,
Abhijith

0 Fairuz Ahmad Naufal 18 days ago in reply to Abhijith V Narayan

Prodigy 40 points

Hi Abhijith,

We still need your help please, we are really open about this query.

Best regard,
Fairuz

+1 Abhijith V Narayan 16 days ago in reply to Fairuz Ahmad Naufal

Intellectual 456 points

Hello Fairuz,

The net "Current+" is BAT- which is your main battery negative (power connection). The designer Mr. Kian Lin has chosen the net name as "Current+" instead of the conventional "BAT-" because this is the net that is used for shunt current sensing and indicates the direction of the current flow.

Best,
Abhijith

0 Fairuz Ahmad Naufal 16 days ago in reply to Abhijith V Narayan

Prodigy 40 points

Dear Abhijith,

Thanks a lot about your explanation.

Best regard,
Fairuz.

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BQ76972: Current+ connection based on TIDA-010247 and PMP23329 reference design