Power Management ICs

Battery Monitoring IC for 3-serial to 5-serial Cell Pack (Secondary Protection) S-82K5B Series

Overcharge detection voltage accuracy:±15mV (S-82M5B)|±20mV (S-82K5B)

Battry Monitoring IC For 3-Serial To 5-Serial Cell Pack (Secondary Protection) S-82K5B Series

This IC is used for secondary protection of lithium-ion rechargeable batteries, incorporating high-accuracy voltage detection
circuits and delay circuits in a small 8-pin package.
Short-circuiting between cells makes it possible for serial connection of 3-cell to 5-cell.
By cascade connection of these ICs, it is possible to protect 6-serial or more cells lithium-ion rechargeable battery packs.


High-accuracy voltage detection circuit for each cell
Overcharge detection voltage n
3.500 V to 4.700 V (5 mV steps)
: Accuracy ±20 mV (Ta = +25°C)
: Accuracy ±25 mV (Ta = −10°C to +60°C)
Overcharge release voltage n*1
3.100 V to 4.700 V
: Accuracy ±50 mV
Delay times for overcharge detection are generated only by an internal circuit (external capacitors are unnecessary)
Overcharge detection delay time : 0.5 s, 1 s, 2 s, 4 s, 6 s, 8 s
CO pin output voltage is limited to 7.5 V max.
Overcharge timer reset function
Available, unavailable
High withstand voltage
Absolute maximum rating 28 V
Wide operating voltage range
3.6 V to 24 V
Wide operating temperature range
Ta = -40°C to +85°C
Low current consumption
During operation (3.4 V for each cell) : 5.0 µA max.
Lead-free (Sn 100%) , halogen-free

*1. Overcharge release voltage = Overcharge detection voltage - Overcharge hysteresis voltage
(Overcharge hysteresis voltage can be selected from a range of 0 mV to 400 mV in 50 mV step.)

Remark n = 1, 2, 3, 4, 5


  • Lithium-ion 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.