S-8243A/B Series

www.sii-ic.com

BATTERY PROTECTION IC

FOR 3-SERIAL OR 4-SERIAL CELL PACK

© Seiko Instruments Inc., 2002-2010

Seiko Instruments Inc.

1

The S-8243A/B Series is a protection IC for lithium-ion rechargeable battery. The S-8243A Series protects 3-series, the S-8243B

Series protects 4-series cell pack from the overcharge, overdischarge, overcurrent voltages. This IC has a high-accuracy battery

protection circuit and a battery monitor amplifier, and also a voltage regulator which operates the microcomputer or gas gauge IC.

Combining this IC and a microcomputer or a gas gauge IC allows to display the amount of charge remained in a battery.

Features

(1)

High-accuracy voltage detection for each cell

• Overcharge detection voltage n (n = 1 to 4)

3.9 V to 4.4 V (50 mV step)

Accuracy

±25 mV

• Hysteresis voltage n (n = 1 to 4) of overcharge detection

−0.10 V to −0.40 V (50 mV step) or 0 V

Accuracy

±50 mV

(Overcharge release voltage n (= Overcharge detection voltage n

+ Hysteresis voltage n) can be selected within

the range 3.8 V to 4.4 V.)

• Overdischarge detection voltage n (n = 1 to 4)

2.0 V to 3.0 V (100 mV step)

Accuracy

±80 mV

• Hysteresis voltage n (n = 1 to 4) of overdischarge detection

0.15 V to 0.70 V or 0 V (50 mV step)

Accuracy

±100 mV

(Overdischarge release voltage n (= Overdischarge detection voltage n

+ Hysteresis voltage n) can be selected

within the range 2.0 V to 3.4 V.)

(2)

Three-level overcurrent protection including protection for short-circuiting

• Overcurrent detection voltage 1

0.05 V to 0.3 V (50 mV step)

Accuracy

±25 mV

• Overcurrent detection voltage 2

0.5 V

Accuracy

±100 mV

• Overcurrent detection voltage 3

Accuracy

±15 %

(3) Delay times for overcharge detection, overdischarge detection and overcurrent detection 1 can be set by external

capacitors. (Delay times for overcurrent detection 2 and 3 are fixed internally.)

(4)

Charge/discharge operation can be controlled through the control pins.

(5)

High-accuracy battery monitor amp

(6)

Voltage regulator

(7)

High input-voltage device

Absolute maximum rating: 26 V

(8)

Wide operating voltage range

6 V to 18 V

(9)

Wide operating temperature range:

−40°C to +85°C

(10) Low current consumption

• Operation mode

120

μA max.

• Power down mode

0.1

μA max.

(11) Lead-free, Sn 100%, halogen-free

*1

*1. Refer to “

Product Name Structure” for details.

Applications

• Lithium-ion rechargeable battery packs

• Lithium polymer rechargeable battery packs

Package

• 16-Pin TSSOP