1 Features
1• 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
– Non Power Path option for low total BOM cost
– 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
• Energy star low quiescent current Iq
– < 15-μA Off-state battery discharge current
– < 1.5-mA Off-state input quiescent current

2 Applications
• Netbooks, mobile internet devices, and ultramobile
PCs
• Personal digital assistants (PDAs)
• Handheld terminals
• Industrial and medical equipment
• Portable equipment

3 Description
The BQ2461x is a highly integrated Li-ion, Li-polymer
or Lead-acid switched-mode battery charge
controller. The device offers a constant-frequency
synchronous switching PWM controller with highaccuracy
charge current and voltage regulation,
charge preconditioning, termination, adapter current
regulation, and charge status monitoring.