The S-82C1E Series is a protection IC for lithium-ion / lithium polymer rechargeable batteries and 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, the S-82C1E Series realizes high-accuracy overcurrent protection with less effect from temperature change.
The S-82C1E Series also has an input pin for charge-discharge control signal, allowing for charge-discharge control with an external signal.
Features
- High-accuracy voltage detection circuit
- Overcharge detection voltage : 3.500 V to 4.600 V (5 mV step) Accuracy ±20 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 1 : 0.010 V to 0.100 V (1 mV step) Accuracy ±3 mV
- Discharge overcurrent detection voltage 2 : 0.030 V to 0.200 V (1 mV step) Accuracy ±5 mV
- Load short-circuiting detection voltage : 0.050 V to 0.500 V (5 mV step) Accuracy ±20 mV
- Charge overcurrent detection voltage : −0.100 V to −0.010 V (1 mV step) Accuracy ±3 mV
- Detection delay times are generated only by an internal circuit (external capacitors are unnecessary).
- Charge-discharge control function
- CTL pin control logic: Active "H", active "L"
- CTL pin internal resistance connection: Pull-up, pull-down
- CTL pin internal resistance value: 1.0 MΩ to 10 MΩ (1 MΩ step)
- CTL pin voltage "H": VSS + 0.7 V, VDD − 0.9 V
- CTL pin voltage "L": VSS + 0.7 V, VDD − 0.9 V
- 0 V battery charge
- Enabled, inhibited
- Power-down function
- Available, unavailable
- Release condition of discharge overcurrent status
- Load disconnection, charger connection
- Release voltage of discharge overcurrent status
- Discharge overcurrent detection voltage 1 (VDIOV1),
Discharge overcurrent release voltage (VRIOV) = VDD × 0.8 (typ.) - Discharge overcurrent status reset function by CTL pin
- Available, unavailable
- 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: 2.0 μA typ., 4.0 μA max. (Ta = +25°C)
- During power-down: 50 nA max. (Ta = +25°C)
- During overdischarge: 1.0 μA max. (Ta = +25°C)
- Lead-free, halogen-free *3
*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.)
*3. Refer to "Product Name Structure" in the datasheet for details.
Applications
- Lithium-ion rechargeable battery pack
- Lithium polymer rechargeable battery pack