I'm going to design some Battery Management System (my first BMS project) for 4 cell, 14.8V, Li-Ion pack and decide to use bq40z60. I would like to use bq40z60EVM schematics and PCB layout but in the "bq40z60EVM SBS 1.1 Impedance Track™ Technology Enabled Battery Management Solution Evaluation Module" (sluub71) document is information that typical DSG and CHG currents are 2A and 5A max.
My questions are:
1. What makes the limitation of the current (PCB layout, sense resistor value, configuration of bq40z60 or some bq40z60 hardware limitations)? I guess what, but have to make sure.
2. If it's possible, what do I need to do in my system to increase typical DSG current to 4A and max to 6-7A?
Wojciech