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AIC1811

One-Cell Lithium-Ion Battery Protection IC

n

FEATURES

l

n

DESCRIPTION

The AIC1811 battery protection IC is designed to

protect

lithium-ion

the

battery

from

to

damage

or

degrading

lifetime

due

overcharge,

and

Less

External

Reduction in Board Size due to Miniature

Package

SOT-23-5

Components.

l

l

Ultra-Low Quiescent Current at 7碌A(chǔ) (V

CC

=3.5V).

Ultra-Low Power-Down Current at 0.4碌A(chǔ) (V

CC

=2.3V).

Precision Overcharge Protection Voltage

4.35V

鹵

50mV for the AIC1811A

4.30V

鹵

50mV for the AIC1811B

4.25V

鹵

50mV for the AIC1811C

overdischarge, and/or overcurrent for one-cell

lithium-ion battery powered systems, such as

cellular phones. The ultra-small package and less

required external components make it ideal to

integrate the AIC1811 into the limited space of

battery pack.

The

accurate

鹵50mV

overcharging

detection

l

l

Built-in Delay Time Circuits for Overcharge,

Over-discharge, and Overcurrent Protection.

Load Detection Function during Overcharge

Mode.

Two Detection Levels for Overcurrent Protection.

voltage ensures safe and full utilization charging.

Three different specification values for overcharge

protection

voltage

are

provided

for

various

protection requirements. The very low standby

current drains little current from the cell while in

storage.

l

l

n

APPLICATIONS

l

Protection IC for One-Cell Lithium-Ion Battery

Pack.

n

TYPICAL APPLICATION CIRCUIT

BATT+

FUSE

R1

BATTERY

100

C1

0.1碌F

2

3

GND

OD

OC

1

R3

AIC1811

10M

BATT-

M2 SI9926

5

VCC

CS

4

R2

51K

M1

SI9926

Protection Circuit for One-Cell Lithium-Ion Battery

DS-1811-00 June 7, 00

www.analog.com.tw

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