●The bq2461x device is a highly integrated, Japan Electronic Information Technology Association (JEITA) guideline-compatible, Li-ion or Li-polymer 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, adapter current regulation, and charge status monitoring
●The bq2461x 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. The bq2461x 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.
● Battery Thermistor Sense for JEITA Guideline
●Compatible Charger
● 600-kHz NMOS-NMOS Synchronous Buck
●Converter
● Stand-Alone Charger Support for Li-Ion or Li-
●Polymer
● 5-V–28-V VCC Input Operating Range and
●Supports 1 to 6 Battery Cells
● Up to 10-A Charge Current and Adapter Current
● High-Accuracy Voltage and Current Regulation
● ±0.5% Charge Voltage Accuracy
● ±3% Charge Current Accuracy
● ±3% Adapter Current Accuracy
● Integration
● Automatic System Power Selection From
●Adapter or Battery
● Internal Loop Compensation
● Internal Soft-Start
● Dynamic Power Management
● Safety Protection
● Input Overvoltage Protection
● Battery Detection
● Reverse Protection Input FET
● Programmable 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 99.5% Maximum
●Effective Duty Cycle
● 24-Pin, 4-mm × 4-mm QFN Package
● Energy Star Low Quiescent Current Iq
● < 15-µA Off-State Battery Discharge Current
● < 1.5-mA Off-State Input Quiescent Current
