The S-82L1A Series 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.
The alarm function enables the voltage detection immediately before the overcharge detection.
Features
- High-accuracy voltage detection circuit
- Overcharge detection voltage: 4.200 V to 4.600 V (5 mV step) Accuracy ±12 mV
- Overcharge release voltage: 4.000 V to 4.600 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 ±100 mV
- Alarm status detection voltage: 4.200 V to 4.600 V (5 mV step) Accuracy ±12 mV
- Discharge overcurrent detection voltage: 0.003 V to 0.100 V (1 mV step) Accuracy ±3 mV
- Load short-circuiting detection voltage: 0.010 V to 0.100 V (5 mV step) Accuracy ±7 mV
- Charge overcurrent detection voltage: −0.100 V to −0.003 V (1 mV step) Accuracy ±3 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: VRIOV = VDD × 0.8 (typ.)
- 0 V battery charge
- Enabled, inhibited
- Power-down function
- Available, unavailable
- Alarm function
- AO pin output logic: Active "L"
- AO pin output form: CMOS output, Nch open-drain output
- Connection when AO pin = "L": VSS pin, VM pin
- 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: 800 nA typ., 1500 nA max. (Ta = +25°C)
- During power-down: 50 nA max. (Ta = +25°C)
- During overdischarge: 500 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.)
Applications
- Lithium-ion rechargeable battery pack
- Lithium polymer rechargeable battery pack