Power Management ICs

Battery Protection IC with Alarm Function for 1-Cell Pack S-82T1A Series

Charge / Discharge overcurrent detection voltage accuracy:
±1.5mV (S-82T1A) | ±1mV (S-82U1A) | ±0.75mV (S-82V1A)

The industry's first* alarm function supports safe, highly efficient fast charging! 1-cell battery protection IC S-82L1/T1/U1/V1 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.
By using an external overcurrent detection resistor, This IC realizes high-accuracy overcurrent protection with less effect from temperature change.
The alarm function enables the voltage detection immediately before the overcharge detection.

Features

High-accuracy voltage detection circuit
Overcharge detection voltage: 3.500 V to 4.800 V (5 mV step) Accuracy ±12 mV
Overcharge release voltage: 3.100 V to 4.800 V*1 Accuracy ±50 mV
Alarm detection voltage: 3.500 V to 4.800 V (5 mV step) Accuracy ±12 mV
Alarm hysteresis voltage: 0 V, 0.010 V, 0.020 V Accuracy ±5 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 100 mV (0.5 mV step) Accuracy ±1.5 mV
Discharge overcurrent 2 detection voltage: 10 mV to 100 mV (1 mV step) Accuracy ±3 mV
Load short-circuiting detection voltage: 20 mV to 100 mV (1 mV step) Accuracy ±5 mV
Charge overcurrent detection voltage: −100 mV to −3 mV (0.5 mV step) Accuracy ±1.5 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
Alarm function
AO pin output logic: Active “H”, active “L”
AO pin output form: CMOS output, Nch open-drain output
Connection when AO pin = “L”: VSS pin, VM pin
Charge control function
Available, unavailable
High-withstand voltage
VM pin, CO pin and AO pin: Absolute maximum rating 28 V
Wide operation temperature range
Ta = −40°C to +85°C
Low current consumption
During operation: 2.5 μA typ., 5.0 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.)

Applications

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