●The bq2461x is a highly integrated 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.
● 600-kHz NMOS-NMOS Synchronous Buck
●Converter
● Stand-Alone Charger Support for Li-Ion or Li-
●Polymer
● 5-V to 28-V VCC Input Operating Range and
●Supports 1- to 6-Battery Cells (bq24610)
● 5-V to 24-V VCC Input Operating Range and
●Supports 1- to 5-Battery Cells (bq24617)
● Up to 10-A Charge Current and Adapter Current
● High-Accuracy Voltage and Current Regulation
● &plusm;0.5% Charge Voltage Accuracy
● &plusm;3% Charge Current Accuracy
● &plusm;3% Adapter Current Accuracy
● Integration
● Automatic System Power Selection From
●Adapter or Battery
● Internal Loop Compensation and Soft Start
● Dynamic Power Management
● Safety Protection
● Input Overvoltage Protection
● Battery Thermistor Sense Hot and Cold
●Charge Suspend
● 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
● Energy Star Low Quiescent Current Iq
● < 15-µA Off-State Battery Discharge Current
● < 1.5-mA Off-State Input Quiescent Current
● APPLICATIONS
● Netbooks, Mobile Internet Devices, and Ultra-
●Mobile PCs
● Personal Digital Assistants (PDAs)
● Handheld Terminals
● Industrial and Medical Equipment
● Portable Equipment
●All other trademarks are the property of their respective owners
