The S-82N1B 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 S-82N1B 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: 3.500 V to 4.600 V (5 mV step) Accuracy ±15 mV
- Overcharge release voltage: 3.100 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
- 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 0.200 V (1 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).
- Power-saving function
- PS pin control logic: Active "H", active "L"
- PS pin internal resistance connection: Pull-up, pull-down
- PS pin internal resistance value: 1.0 MΩ, 2.0 MΩ, 3.0 MΩ, 4.0 MΩ, 5.0 MΩ
- Discharge overcurrent control function
- Release condition of discharge overcurrent status: Load disconnection, charger connection
- Release voltage of discharge overcurrent status: Discharge overcurrent detection voltage (VDIOV), Discharge overcurrent release voltage (VRIOV) = VDD × 0.8 (typ.)
- 0 V battery charge
- Enabled, inhibited
- Power-down function
- 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: 600 nA typ., 990 nA max. (Ta = +25°C)
- During power-down: 50 nA max. (Ta = +25°C)
- During power-saving: 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.)
Applications
- Lithium-ion rechargeable battery pack
- Lithium polymer rechargeable battery pack