1FEATURES

2• 600kHz Synchronous Switch-mode Charger

with 4 A Integrated N-MOSFETs

• Up to 96% Efficiency

• 30 V Input Rating with 18V Overvoltage

Protection

– 4.5 V to 17 V Input Operating Range

• Battery Charge Voltage

– 1, 2,or 3-Cell With 4.2V/Cell

• Constant Current Super Capacitor Charging

• High Integration

– Integrated 20-V Switching MOSFETs

– Integrated Bootstrap Diode

– Internal Loop Compensation

– Internal Digital Soft Start

• Safety

– Thermal Regulation Loop Throttles Back

Current to Limit TJ = 120°C

– Thermal Shutdown

– Battery Thermistor Sense Hot/Cold Charge

Suspend

– Input Overvoltage Protection

– Cycle by Cycle Current Limit

• Accuracy

– ±0.5% Charge Voltage Regulation

– ±4% Charge Current Regulation

• Less than 15 μA Battery Current with Adapter

Removed

• Small QFN Package

– 3.5 mm x 4.5 mm QFN-20 pin

APPLICATIONS

• Tablet PC

• Netbook and Ultra-Mobile Computers

• Portable Data Capture Terminals

• Portable Printers

• Medical Diagnostics Equipment

• Battery Bay Chargers

• Back-Up Systems

• Li-Ion/Li-Polymer Battery and Super Capacitor

Applications

DESCRIPTION

The bq24130 is an integrated host-controlled Li-ion and Li-polymer switch-mode battery charge controllers with

two integrated N-channel power MOSFETs. It offers a constant-frequency synchronous PWM controller with high

accuracy regulation of charge current and voltage. The fast charge and precharge current can be either

hardwired with resistors or programmed by system power management microcontroller using a DAC or GPIOs.

Battery remote sensing provides accurate charge voltage regulation.

The bq24130 monitors the battery pack temperature to allow charger only in a preset temperature window. The

thermal regulation loop reduces the charge current to maintain the junction temperature of 120ºC during

operation.

The bq24130 automatically enters a low-quiescent current sleep mode when the input voltage falls below the

battery voltage. The bq24130 charges one, two or three cell (selected by CELL pin), supporting up to 4 A charge

current. The bq24130 is available in a 20-pin, 3.5 x 4.5 mm2 thin QFN package.