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BQ40Z60: Cell Balancing Time Equation

Part Number: BQ40Z60


In the reference manual for BQ40Z60 (Section 8 - Cell Balancing), is the following equation correct for the cells 2-4 balancing time? We thought only the 2x resistor would change from the equation of Cell 1 to the equation for Cells 2-4. But in this section, it also has the duty cycle multiplied by the whole expression for Cell 1, but not for Cells 2-4, due to the parenthesis.

Thank you,