TWO-CELL LITHIUM-ION

02/26/2008 Rev.1.00

www.SiliconStandard.com

1

BATTERY PROTECTION IC

FEATURES

Ultra-Low Quiescent Current at 10

Ultra-Low Power-Down Current at 0.2

Wide Supply Range: 2 to 18V.

Precision Overcharge Protection Voltage

4.35V

± 30mV for the SS6802A

4.30V

± 30mV for the SS6802B

4.25V

± 30mV for the SS6802C

Built-in

Delay

Circuits

for

Overcharge,

Over-discharge and Overcurrent Protection.

Overcharge and Overdischarge Delay Time

can be Extended by External Capacitors.

Built-in Cell-balancing Bleeding Network under

Overcharge Condition.

APPLICATIONS

Protection IC for Two-Cell Lithium-Ion Battery

Pack.

DESCRIPTION

The SS6802 battery protection IC is designed

to protect lithium-ion batteries from damage due

to

overcharging,

overdischarging,

and

overcurrent for two series cells in portable

phones and laptop computers. It can be a part

of the low-cost charge control system within a

two-cell lithium-ion battery pack.

Safe and full utilization charging is ensured by

the accurate

±30mV overcharge detection.

Three

different

specification

values

for

overcharge protection voltage are provided for

various protection requirements. The very low

standby current drains little current from the

cells while in storage.

TYPICAL APPLICATION CIRCUIT

5

3

7

4

2

1

6

8

SS6802

**R1 & R2: Refer application informations.

C2

1

µF

*C

TC

CEM9926

*C

TD

VCC

TC

VC

TD

GND

OC

OD

CS

BATTERY 1

BATTERY 2

M1

CEM9926

C1

1

µF

R6

1K

M2

R4

1M

Q1

R5

1M

R3

1M

**R1

**R2

C3

0.01

µF

Protection Circuit for Two-Cell Lithium-Ion Battery Pack

SS6802

Pb-free; RoHS-compliant