Overcurrent Monitoring IC For Multi-Serial-Cell Pack S-8239A Series

The S-8239A Series is an overcurrent monitoring IC for multi-serial-cell pack including high-accuracy voltage detection circuits and delay circuits.
The S-8239A 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

Available, unavailable

UVLO (under voltage lock out) function

UVLO detection voltage : 2.0 V (Fixed) : Accuracy ±100 mV

High-withstand voltage

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 UVLO operation: 6.0 μA max.

Output logic

Active “L”, Active “H”

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