BQ24133RGYR.pdf

3 Description

The BQ24133 device is a highly integrated standalone Li-Ion and Li-Polymer switched-mode battery

charger with two integrated N-channel power

MOSFETs. The device offers a constant-frequency

synchronous PWM controller with high accuracy

regulation of input current, charge current, and

voltage. The BQ24133 closely monitors the battery

pack temperature to allow charge only in a preset

temperature window. The BQ24133 charges one, two,

or three cells (selected by CELL pin) at a fixed 4.2 V/

cell.1 Features

• 1.6-MHz Synchronous switched-mode charger

with 2.5-A integrated N-MOSFETs

• Up to 92% efficiency

• 30-V Input rating with adjustable overvoltage

protection

– 4.5-V to 17-V Input operating voltage

• Battery charge voltage

– 1-Cell, 2-cell, or 3-cell with 4.2 V/cell

• High integration

– Automatic Power Path selector between

adapter and battery

– Dynamic power management

– Integrated 20-V switching MOSFETs

– Integrated bootstrap diode

– 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 and battery detect

– Adjustable input overvoltage protection

– Cycle-by-cycle current limit

• Accuracy

– ±0.5% Charge voltage regulation

– ±5% Charge current regulation

– ±6% Input current regulation

• <15-μA Battery current with adapter removed

• <1.5-mA Input current with adapter present and

charge disabled package

2 Applications

• Tablet PCs

• Netbooks and ultra-mobile computers

• Portable data capture terminals

• Portable printers

• Medical diagnostics equipment

• Battery bay chargers

• Battery backup systems