Power Management ICs

Battery Protection IC for 1-Cell Pack S-82Y1B Series

DatasheetOct. 04, 2022

Parts List


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Substantially reduce heat generation of the protection circuit board and cope with the need for quick charging S-82Y1B Series

This IC is a protection IC for lithium-ion / lithium polymer rechargeable batteries, which includes high-accuracy voltage detection circuits and delay circuits. It is suitable for protecting 1-cell lithium-ion / lithium polymer rechargeable battery packs from overcharge, overdischarge, and overcurrent.
Use of an external overcurrent detection resistor enables this IC to provide high-accuracy overcurrent protection with less impact from temperature changes.


High-accuracy voltage detection circuit
Overcharge detection voltage: 3.500 V to 4.800 V (5 mV step) Accuracy ±15 mV
Overcharge release voltage: 3.100 V to 4.800 V*1 Accuracy ±50 mV
Overdischarge detection voltage: 2.000 V to 3.000 V (10 mV step) Accuracy ±50 mV
Overdischarge release voltage: 2.000 V to 3.400 V*2 Accuracy ±75 mV
Discharge overcurrent 1 detection voltage: 3 mV to 50 mV (0.25 mV step) Accuracy ±0.5 mV
Discharge overcurrent 2 detection voltage: 6 mV to 100 mV (0.5 mV step) Accuracy ±1.5 mV
Load short-circuiting detection voltage: 15 mV to 100 mV (1 mV step) Accuracy ±3.0 mV
Charge overcurrent detection voltage: −50 mV to −3 mV (0.25 mV step) Accuracy ±0.5 mV
Detection delay times are generated only by an internal circuit (external capacitors are unnecessary).
Discharge overcurrent control function
Release condition of discharge overcurrent status: Load disconnection
Release voltage of discharge overcurrent status: Discharge overcurrent release voltage (VRIOV) = VDD × 0.8 (typ.)
0 V battery charge
Enabled, inhibited
Power-down function
Available, unavailable
High-withstand voltage
VM pin and CO pin: Absolute maximum rating 28 V
Wide operation temperature range
Ta = −40°C to +85°C
Low current consumption
During operation: 2.0 μA typ., 4.0 μA max. (Ta = +25°C)
During power-down: 50 nA max. (Ta = +25°C)
During overdischarge: 0.5 μA max. (Ta = +25°C)
Lead-free (Sn 100%), halogen-free

*1. Overcharge release voltage = Overcharge detection voltage − Overcharge hysteresis voltage
(Overcharge hysteresis voltage can be selected as 0 V or from a range of 0.1 V to 0.4 V in 50 mV step.)

*2. Overdischarge release voltage = Overdischarge detection voltage + Overdischarge hysteresis voltage
(Overdischarge hysteresis voltage can be selected as 0 V or from a range of 0.1 V to 0.7 V in 100 mV step.)


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

Parts List

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  • The information herein is subject to change without notice.