The bq24610EVM-603 provides a solution for charging more 7-cell Li-ion battery. It uses the bq24610, the TPS54060, UCC2701, INA169, and LM2903. Detail design ideas are available in the Texas Instruments application report SLUA580.
The bq24610 is an integrated Li-ion or Li-polymer switch-mode battery charge controller. It offers a constant-frequency synchronous switching PWM controller with high-accuracy charge current and voltage regulation. Other features include charge preconditioning, termination, and charge status monitoring.
The BQ24610EVM-603 charges the battery in three phases: preconditioning, constant current, and constant voltage. Charge is terminated when the current reaches a minimum user-selectable level. A programmable charge timer provides a safety backup for charge termination. The bq24610EVM-603 automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and enters a low-quiescent current sleep mode when the input voltage falls below the battery voltage