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 2-serial-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.

The S-82B2A Series has an input pin for charge-discharge control signal (CTL pin), allowing for charge-discharge control

with an external signal. The S-82B2B Series has an input pin for power-saving signal (PS pin), allowing for reduction of

current consumption by using an external signal to start the power-saving function.

Features

• High-accuracy voltage detection circuit

Overcharge detection voltage n 3.500 V to 4.800 V (5 mV step) Accuracy ±20 mV

Overcharge release voltage n 3.100 V to 4.800 V*1 Accuracy ±50 mV

Overdischarge detection voltage n 2.000 V to 3.000 V (10 mV step) Accuracy ±50 mV

Overdischarge release voltage n 2.000 V to 3.400 V*2 Accuracy ±75 mV

Discharge overcurrent 1 detection voltage 3 mV to 100 mV (0.5 mV step) Accuracy ±3.0 mV

Discharge overcurrent 2 detection voltage 10 mV to 100 mV (1 mV step) Accuracy ±5 mV

Load short-circuiting detection voltage 20 mV to 100 mV (1 mV step) Accuracy ±10 mV

Charge overcurrent detection voltage −100 mV to −3 mV (0.5 mV step) Accuracy ±3.0 mV

• Detection delay times are generated only by an internal circuit (external capacitors are unnecessary).

• Charge-discharge control function (S-82B2A Series)

CTL pin control logic: Active H, active L

CTL pin internal resistance connection: Pull-up, pull-down

CTL pin internal resistance value: 1 MΩ to 10 MΩ (1 MΩ step)

• Power-saving function (S-82B2B Series)

PS pin control logic: Active H, active L

PS pin internal resistance value: 1 MΩ to 10 MΩ (1 MΩ step)

• 0 V battery charge: Enabled, inhibited

• Power-down function: S-82B2A Series: Available, unavailable

S-82B2B Series: Available

• 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: 3.0 μA typ., 6.0 μA max. (Ta = +25°C)

During power-down: 50 nA max. (Ta = +25°C)

During overdischarge: 1.0 μA max. (Ta = +25°C)

During power-saving (S-82B2B Series): 50 nA max. (Ta = +25°C)

• Lead-free (Sn 100), halogen-free

Applications

• Lithium-ion rechargeable battery pack

• Lithium polymer rechargeable battery pack