AAT3670 データシートの表示（PDF） - Advanced Analogic Technologies

部品番号

コンポーネント説明

メーカー

AAT3670

1.6A Dynamic Battery Charger and Power Manager

Advanced Analogic Technologies 

BatteryManagerTM

PRODUCT DATASHEET

AAT3670

1.6A Dynamic Battery Charger and Power Manager

General Description

The AAT3670 BatteryManager is a highly integrated sin-

gle-cell lithium-ion/polymer (Li-ion) battery charger and

system power management IC that enables simultane-

ous battery charging and full system usage without com-

promising the battery’s charge cycle life. It operates with

low-voltage AC adapter (ADP) and USB inputs and

requires a minimum number of external components.

The AAT3670 selects ADP or USB to power the system

load and charge the battery when ADP/USB power is

available. The AAT3670 precisely regulates battery

charge voltage and current for 4.2V Li-ion cells. Charge

current can be programmed up to 1.6A for ADP charging

and 0.9A or 0.1A for USB charging by resistors on the

ADPSET / USBSET pins. The charge termination current

threshold is set by an external resistor on the TERM pin.

The AAT3670 has a voltage-sensed charge current

reduction loop that enables system operation without a

power shortage. When the input voltage falls below the

programmable charge reduction threshold, the device

automatically reduces the charge current until the input

voltage returns to the threshold voltage.

Battery temperature and charge state are fully monitored

for fault conditions. In the event of a battery over-volt-

age/short-circuit/over-temperature condition, the char-

ger will automatically shut down, protecting the charging

device, control system, and battery. Two status monitor

output pins (STAT1 and STAT2) are provided to indicate

battery charge status by directly driving external LEDs.

The AAT3670 is available in a Pb-free, thermally-

enhanced, space-saving 24-pin 4x4mm QFN package.

Typical Application

Features

• ADP, USB, or Battery Powers System Load Through

Internal Current-Limited Switches

• Simultaneous Battery Charging and System Usage

• Voltage Sensed Charge Reduction Loop to Minimize

Charge Time, Even While the System Operates

• Digitized Thermal Loop

• Battery Power Enable (ENBAT)

• Battery Charge Timer (CT)

• Battery Temperature Monitoring (TS)

• Battery Charge Status Report (STATx)

• Automatic Recharge Sequencing

• Battery Under-Voltage, Over-Voltage, and Over-

Current Protection

• System Load Current Limiting

• Thermal Protection

• 24-pin 4x4mm QFN Package

Applications

• Cellular Telephones

• Digital Still Cameras

• Personal Data Assistants (PDAs)

• Hand Held PCs

• MP3 Players and PMP

• Other Li-ion Battery Powered Devices

Adapter Input

USB Input

Enable

Enable Battery to OUT

USB Hi/Lo Select

CADP

10µF

CUSB

10µF

RADPSET RUSBSET

RADPLIM

RUSBLIM

STAT1

OUT

STAT2

ADP

BATS

BAT

AAT3670

USB

VTS

EN

TS

ENBAT

USBSEL

CHRADP

ADPSET

CHRUSB

USBSET

CT

ADPLIM

USBLIM

TERM

GND

System Load

CBAT

10µF

RT

Single Cell

Li-Ion/Poly

T Battery

CT

RTERM

3670.2008.04.1.5

www.analogictech.com

1

Share Link: