Power Management ICs

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

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.


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 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.


  • Lithium-ion rechargeable battery pack
  • Lithium polymer rechargeable battery pack

Parts List

  • U(Ux), S and G at the end of the product name of ABLIC Inc. were used to indicate different material specifications as “environmental code”,
    however, these have now been unified into “lead-free and halogen-free” and are identical in terms of environmental quality.
  • Note: Lead-free plating other than 100% Sn is applied to some limited old products, therefore, please contact our sales representatives for details.
  • These descriptions may be different from the actual product name and parameter.
    Please confirm the product name and specifications with the data sheet again.
  • The information herein is subject to change without notice.