The S-8240A Series is a protection IC for lithium-ion / lithium polymer rechargeable batteries and includes high-accuracy voltage detection circuits and delay circuits.
The S-8240A Series is suitable for protecting 1-cell lithium-ion / lithium polymer rechargeable battery packs from overcharge, overdischarge, and overcurrent.
Features
- High-accuracy voltage detection circuit
- Overcharge detection voltage: 3.5 V to 4.6 V (5 mV step) Accuracy ±20 mV
- Overcharge release voltage: 3.1 V to 4.6 V*1 Accuracy ±50 mV
- Overdischarge detection voltage: 2.0 V to 3.4 V (10 mV step) Accuracy ±50 mV
- Overdischarge release voltage: 2.0 V to 3.4 V*2 Accuracy ±100 mV
- Discharge overcurrent detection voltage: 0.015 V to 0.200 V (5 mV step) Accuracy ±5 mV
- Load short-circuiting detection voltage: 0.065 V to 0.500 V (25 mV step)*3 Accuracy ±40 mV
- Charge overcurrent detection voltage: -0.200 V to -0.015 V (5 mV step) Accuracy ±5 mV
- Detection delay times are generated only by an internal circuit
(external capacitors are unnecessary). - 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
- Vriov, Vdiov
- 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: 1.5 μA typ., 3.0 μA 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 from a range of 0 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 from a range of 0 V to 0.7 V in 100 mV step.)
*3. Load short-circuiting detection voltage = Discharge overcurrent detection voltage + 0.025 × n
(n can be selected from any integer value greater or equal to 2)
Applications
- Lithium-ion rechargeable battery pack
- Lithium polymer rechargeable battery pack