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.