• 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
  • ±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 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

• Netbooks, Mobile Internet Devices, and Ultra-Mobile PCs
• Personal Digital Assistants (PDAs)
• Handheld Terminals
• Industrial and Medical Equipment
• Portable Equipment

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.