S-8239B Series

www.sii-ic.com

OVERCURRENT MONITORING IC

FOR MULTI-SERIAL-CELL PACK

© Seiko Instruments Inc., 2014

Seiko Instruments Inc.

1

The S-8239B Series is an overcurrent monitoring IC for multi-serial-cell pack including high-accuracy voltage detection

circuits and delay circuits.

The S-8239B Series is suitable for protection of lithium-ion / lithium polymer rechargeable battery packs from overcurrent.



Features

• Built-in high-accuracy voltage detection circuit

Overcurrent 1 detection voltage

*1

0.04 V to 0.30 V (10 mV step)

Accuracy

±15 mV

Overcurrent 2 detection voltage

0.1 V to 0.7 V (100 mV step)

Accuracy

±100 mV

Overcurrent 3 detection voltage

1.2 V (Fixed)

Accuracy

±300 mV

• Built-in three-step overcurrent detection circuit: Overcurrent 1, overcurrent 2, overcurrent 3

• Overcurrent 3 detection function is selectable: Available, unavailable

• UVLO (under voltage lock out) function

UVLO detection voltage

2.0 V (Fixed)

Accuracy

±100 mV

• High-withstand voltage device is used:

VM pin, DO pin: Absolute maximum rating 28 V

• Delay times are generated only by an internal circuit (External capacitors are unnecessary).

• Low current consumption

During normal operation:

7.0

μA max.

During power-down:

0.1

μA max.

• Output logic:

Active "L"

• Wide operation temperature range:

Ta =

−40°C to +85°C

• Lead-free (Sn 100%), halogen-free

*1. Overcurrent 1 detection voltage

≤ 0.06 V should be satisfied in the case of overcurrent 2 detection voltage = 0.1 V.

Overcurrent 1 detection voltage

≤ 0.85 × overcurrent 2 detection voltage − 0.05 V should be satisfied in the case of

overcurrent 2 detection voltage

≥ 0.2 V.



Applications

• Lithium-ion rechargeable battery pack

• Lithium polymer rechargeable battery pack



Package

• SOT-23-6