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BQ24620,pdf(28V SYNCHRONOUS SW
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The bq24620 is highly integrated switch-mode battery charge controller designed specifically for Lithium Phosphate battery. It offers a constant-frequency synchronous PWM controller with high accuracy current and voltage regulation, charge preconditioning, termination, and charge status monitoring.
The bq24620 charges the battery in three phases: preconditioning, constant current, and constant voltage. Charge is terminated when the current reaches a minimum level. An internal charge timer provides a safety backup. The bq24620 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.
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