1 Features
1• 1.2-MHz NMOS-NMOS Synchronous Buck
Converter
• Stand-Alone Charger Support for Li-Ion or Li-
Polymer
• 5-V – 28-V VCC Input Voltage Range and
Supports 1S-6S Battery Cells
• Up to 10-A Charge Current and Adapter Current Li•
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 low–
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 Iq
– < 15-μA Off-State Battery Discharge Current
– < 1.5-mA Off-State Input Quiescent Current

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

3 Description
The bq24600 is a highly integrated Li-ion or Li•
polymer 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 low–
quiescent-current sleep mode when the input voltage falls below the battery voltage.