The bq24620 device is a highly integrated lithium phosphate switched-mode battery charge controller. The device offers a constant-frequency synchronous switching PWM controller with high-accuracy charge 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.
● 300-kHz NMOS-NMOS Synchronous Buck
●Converter
● Stand-Alone Charger Designed Specifically for
●Lithium Phosphate
● 5-V to 28-V VCC Operating Range, Supports 1 to
●7 Battery Cells
● High-Accuracy Voltage and Current Regulation
● ±0.5% Charge Voltage Accuracy
● ±3% Charge Current Accuracy
● Integration
● Internal Loop Compensation
● Internal Soft Start
● Safety
● Input Overvoltage Protection
● Battery Thermistor Sense Suspend Charge at
●Hot/Cold Charge Suspend and Automatically
●ICHARGE/8 at WARM/COOL
● Battery Detection
● Built-In Safety Timer
● Charge Overcurrent Protection
● Battery Short Protection
● Battery Overvoltage Protection
● Thermal Shutdown
● Status Outputs
● Adapter Present
● Charger Operation Status
● Charge Enable Pin
● 6-V Gate Drive for Synchronous Buck Converter
● 30-ns Driver Dead Time and 99.95% Maximum
●Effective Duty Cycle
● 16-Pin 3.5-mm × 3.5-mm QFN Package
● Energy Star Low Iq
● < 15-µA Off-State Battery Discharge Current
● < 1.5-mA Off-State Input Quiescent Current
● APPLICATIONS
● Power Tools and Portable Equipment
● Personal Digital Assistants
● Handheld Terminals
● Industrial and Medical Equipment
● Netbooks, Mobile Internet Devices, and
●Ultramobile PCs
●All other trademarks are the property of their respective owners