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8 cell Li-PO charger with cell balancing

Dear all,

We are looking for a battery charger solution for Li-Pol batteries.

We need a solution to charge and balance 8 cells. There is a requirement that balancing circuit should not draw any current from batteries if the charger is unpluged. Therefore balancing should be done only if the external voltage for charging is applied. Is it possible?

Nominal voltage of one cell is 3.7V, capacity 2.5Ah.

 Can you please provide part numbers or better an application note for this solution?

Many thanks,

Daniel