AAT8636-S3-T datasheet(1/16 Pages) AAT

Part #	AAT8636-S3-T

Description	ONE-CELL LI-ION BATTERY PROTECTION IC

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Manufacturer	AAT [Advanced Analog Technology, Inc.]

Direct Link	http://www.aatech.com.tw

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Advanced Analog Technology, Inc.

–

台灣類比科技股份有限公司 –

–

Advanced Analog Technology, Inc. –

Page 1 of 16

V 1.0

AAT8636 Series

Details are subject to change without notice

ONE-CELL LI-ION BATTERY PROTECTION IC

FEATURES

• Ideal for One-Cell Rechargeable Li-Ion Battery

Pack.

• Low Current Consumption

A

0

.

3

µ …………..Supply Current (Typical)

A

1

.

0

µ …………..Standby Current

• High Withstand Voltage

Absolute Maximum Ratings..22V (

VN

V

DD −

)

• High Accuracy Voltage Detection

Over Charge Detector…………...

mV

20

±

Over Discharge Detector……….

%

5

.

2

±

• Over Current and Short Circuit Protection

• Wide Operating Temperature Range

C

40o

−

to

C

85o

• Ultra Small Package……..SOT26

PIN CONFIGURATION

OUT

D

VN

OUT

C

GND

ext

C

DD

V

GENERAL DESCRIPTION

The AAT8636 series are protection ICs designed

to safeguard one-cell rechargeable Li-Ion battery

pack against over charge, over discharge, over

current, and short circuit. The AAT8636 series

use advanced high voltage CMOS process to

provide high accuracy voltage detection and low

current consumption.

The AAT8636 series incorporate a reference unit

and three voltage detectors. During the charging

process, when the cell voltage (

DD

V

) is charged to

a value higher than the over charge threshold

voltage (

1

C

V ), the over charge detector (COM1)

will switch the output pin (

OUT

C

) to a low level

within a delay time (

1

C

t

), and thus turning off the

MOSFET connected to the charging path. The

OUT

C

pin may change to high level again when

the

DD

V

voltage falls below “

HYS

1

C

V

−

”, or

when

DD

V

falls below

1

C

V

while the charger is

disconnected from the battery pack.

During the discharging process, when the

DD

V

drops to a value lower than the over-discharge

threshold voltage (

1

D

V

), the over-discharge

detector (COM2) will switch

OUT

D

to low level

within a delay time (

1

D

t

), and thus turning off the

MOSFET connecting to the discharging path. In

the mean time, the AAT8636 series will enter a

low current standby mode. Once into standby

mode, the systems can only be released from

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