BQ24600RVAR

The bq24600 is a highly integrated Li-ion or Lipolymer switch-mode battery-charge controller. It offers a constant-frequency synchronous PWM controller with high-accuracy charge current and voltage regulation, charge preconditioning, termination, and charge status monitoring. The bq24600 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 bq24600 automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and enters a lowquiescent-current sleep mode when the input voltage falls below the battery voltage.

Applications

• Portable Equipment
• Handle Terminals
• Industrial and Medical Equipment
• Power Tools
• Appliance
• Mobile Internet Device
• Ultra-Mobile PC

Key features

• 1.2-MHz NMOS-NMOS Synchronous Buck Converter Stand-Alone Charger Support for Li-Ion or LiPolymer 5-V – 28-V VCC Input Voltage Range and Supports 1S-6S 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
• Integration Internal Loop Compensation
• Internal Soft Start
• Safety Input Overvoltage Protection
• Battery Thermistor Sense Hot/Cold Charge Suspend
• 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 Power Converter
• 30-ns Driver Dead-Time and 99.5% Max. Effective Duty Cycle
• 16-Pin 3.5-mm×3.5-mm QFN package
• Energy Star Low Quiescent Current I₀
• 15-μA/2 Off-State Battery Discharge Current
• <1.5 mA Off-State Input Quiescent Current