Power Management ICs

Battery Protection IC for 3-Serial or 4-Serial-Cell Pack S-8204A Series

The S-8204A Series includes high-accuracy voltage detection circuits and delay circuits, in single use, makes it possible for users to monitor the status of 3-series or 4-series cell lithium-ion rechargeable battery. By switching the voltage level which is applied to the SEL pin, users are able to use the S-8204A Series either for 3-series or 4-series cell pack. By cascade connection using the S-8204A Series, it is also possible to protect 6-series or more cells(*1) lithium-ion rechargeable battery pack.

(*1). Refer to the application note for connection examples of protection circuit for 6-series or more cells. In case of protecting 5-series cell lithium-ion rechargeable battery pack, contact our sales representatives.


High-accuracy voltage detection for each cell
Overcharge detection voltage n(n=1 to 4): 3.8 V to 4.6 V (50 mV steps) Accuracy ±25 mV
Overcharge release voltage n(n=1 to 4): 3.6 V to 4.6 V (*1) Accuracy ±50 mV
Overdischarge detection voltage n(n =1 to 4): 2.0 V to 3.0 V (100 mV steps) Accuracy ±80mV
Overdischarge release voltage n(n=1 to 4): 2.0 V to 3.4 V (*2) Accuracy ±100 mV
Discharge overcurrent detection in 3-step
Discharge overcurrent detection voltage 1: 0.05 to 0.30 V (50 mV steps) Accuracy ±15 mV
Discharge overcurrent detection voltage 2: 0.5 V (fixed) Accuracy ±100 mV
Short circuit detection voltage: 1.0 V (fixed) Accuracy ±300 mV
Charge overcurrent detection
Charge overcurrent detection voltage: -0.25 to -0.05 V (50 mV step) Accuracy ±30 mV
Settable by external capacitor; Overcharge detection delay time, Overdischarge detection delay time, Discharge overcurrent detection delay time 1, Discharge overcurrent detection delay time 2
(Short circuit detection voltage delay time is internally fixed.)
Switchable between 3-series and 4-series cell by using the SEL pin
Independent charging and discharge control by the control pins
High-withstand voltage
Absolute maximum rating: 24 V
Wide operating voltage range
2 V to 22 V
Wide range of operation temperature
Ta = -40°C to +85°C
Low current consumption
Operation mode 33 µA max.(Ta = +25°C)
Power-down mode 0.1 µA max. (Ta = +25°C)
Lead-free, Sn 100%, halogen-free

(*1). Overcharge hysteresis voltage n (n = 1 to 4) is selectable in 0 V, or in 0.1 V to 0.4 V in 50 mV step.
(Overcharge hysteresis voltage = Overcharge detection voltage – Overcharge release voltage) (*2). Overdischarge hysteresis voltage n (n = 1 to 4) is selectable in 0 V, or in 0.2 V to 0.7 V in 100 mV step.
(Overdischarge hysteresis voltage = Overdischarge release voltage – Overdischarge detection voltage)


  • Lithium-ion rechargeable battery packs

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.