Battery protection ICs ideal for high-accuracy overcurrent protection and higher safety S-82A2/B2 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 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-82A2A/C Series has an input pin for charge-discharge control signal (CTL pin), allowing for charge-discharge control with an external signal. The S-82A2B 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 ±15 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 ±1.0 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 ±1.0 mV
- Detection delay times are generated only by an internal circuit (external capacitors are unnecessary).
- Charge-discharge control function (S-82A2A/C 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-82A2B 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-82A2A/C Series: Available, unavailable
- S-82A2B 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-82A2B Series): 50 nA 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.)
Remark n = 1, 2
Applications
- Lithium-ion rechargeable battery pack
- Lithium polymer rechargeable battery pack