Hello,
I am currently working with the BQ34Z100-R2 to oversee the status of two 12V lead-acid batteries arranged in series. I've reached a point of confusion due to various definitions of BAT+, BAT-, and PACK-. I am seeking a more profound understanding of these terms and their actual representations. For your reference, I have attached my schematic and would appreciate any insights if there are concerns about the circuit implementation.
- The two terminals, BAT+ and BAT-, would be the physical connections to the battery itself, where PACK- would be the high side of the sense resistor from where the current flows through the sense resistor back to BAT-, thereby allowing the Fuel Gauge to monitor the battery?
- As I plan the layout, I'm unsure about the optimal placement of the sense resistor. On the EVM, it appears close to the battery connection terminal, but the BQ34Z100-R2 datasheet suggests a less stringent placement. Could you provide guidance on this matter?
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I've noticed variations in implementations regarding the splitting of GND into GND and AGND. How critical is it to split the GND in this context?
Your assistance in clarifying these aspects would be greatly appreciated.
Best regards
Mathias
