ACT2801CQL-T View Datasheet(PDF) - Unspecified

Part Name

Description

MFG CO.

ACT2801CQL-T

5V/1.5A Backup Battery Pack Manager

Unspecified 

ACT2801/ACT2801C

Rev 2, 15-Apr-14

5V/1.5A Backup Battery Pack Manager

FEATURES

• Dedicated Single Chip Solution for Mobile Power

With Minimal Component Count

• 5V/1.5A Constant Output Current Limit in Boost

Mode

• 1.5A Switching Charger Limit

• Programmable 4.1V to 4.35V Battery Voltage

• 95% Boost Efficiency (Vbat=4.1V)

• Adaptive to 10mA-2400mA Input Sources

• Battery Disconnection at Output Short

• <10µA Low Battery Leakage Current at HZ

Mode During Storage

• Boost Auto Turn-off at No Load and Push

Button Turn-on

• Battery Over Current, Over Voltage, Over

Temperature and Short Circuit Protections

• Boost Auto Startup with Load Detection

• Up to 2.0A Input Current Limit with Prioritized

Power Path to Output

• 5V+/-100mV Output Voltage in Boost Mode

• 1.1MHz/0.55MHz Switching Frequencies

• 2.2uH SMD Inductor and Low Profile Ceramic

Capacitor

• 4 LEDs Battery Level and Status Indication

• Battery Impedance Compensation

• Full Cycle of Battery Charge Management

Preconditioning, Fast Charge, Top off and End

of Charge

• Charge Current Foldback at 110°C Die

Temperature

• IC Over Temperature Protection at 160°C

• QFN4x4-24 Package

APPLICATIONS

• Backup Battery Pack

• Power Bank

• Mobile Power

• Standalone Battery Charger with USB Output

GENERAL DESCRIPTION

ACT2801/ACT2801C is a space-saving and high-

performance low-profile single-chip solution for

backup battery pack and standalone battery

charger. ACT2801/ACT2801C integrates all the

functions that a backup battery pack needs,

including switching charger, boost converter and

LED indication.

ACT2801/ACT2801C operates at 1.1MHz for

switching charger and 0.55MHz for boost converter

allowing tiny external inductor and capacitors.

ACT2801/ACT2801C provides a direct power path

from input to output with programmable current limit

while providing power to switching charger. Output

has higher priority than battery charger if the

programmed input current limit is reached.

ACT2801/ACT2801C charges battery with full cycle

of preconditioning, fast charge with constant current

and constant voltage until end of charge. The

battery charger is thermally regulated at 110°C with

charge current foldback.

ACT2801/ACT2801C boost converter steps battery

voltage up to 5V. Boost converter features high

efficiency, constant current regulation, short circuit

protection and over voltage protection.

ACT2801/ACT2801C provides 3.5mA constant

currents to drive 4 LEDs to indicate battery level

and charge status. Battery impedance is

compensated for battery level indication.

Innovative PowerTM

-1-

Boost CC/CV Curve

5.5

VBAT =3.7V

5.0

VBAT =3.2V

4.5

4.0

VBAT =4.1V

3.5

3.0

0

200 400 600 800 1000 1200 1400

Output Current (mA)

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