Описание
The S-8241 Series is a series of lithium ion/lithium polymer rechargeable battery protection ICs incorporating high-accuracy voltage detection circuits and delay circuits. These ICs are suitable for protection of 1-cell lithium ion/lithium polymer battery packs from overcharge, overdischarge and overcurrent.
Internal high-accuracy voltage detection circuit Overcharge detection voltage: 3.9 V to 4.4 V (5 mV-step) Accuracy of ±25 mV (+25°C) and ± 30 mV (-5 to +55°C) Overcharge release voltage: 3.8 V to 4.4 V Accuracy of ±50 mV Overdischarge detection voltage: 2.0 V to 3.0 V (100 mV-step) Accuracy of ±80 mV Overdischarge release voltage: 2.0 V to 3.4 V Accuracy of ±100 mV Overcurrent 1 detection voltage: 0.05 V to 0.32 V (5 mV-step) Accuracy of ±20 mV Overcurrent 2 detection voltage: 0.5 V (fixed) Accuracy of ±100 mV A high voltage withstand device is used for charger connection pins (VM and CO pins: Absolute maximum rating = 26 V) Delay times (overcharge: tCU; overdischarge: tDL; overcurrent 1: tlOV1; overcurrent 2: tlOV2) are generated by an internal circuit. (External capacitors are unnecessary.) Accuracy of ±30% Internal three-step overcurrent detection circuit (overcurrent 1, overcurrent 2, and load short-circuiting) Either the 0 V battery charging function or 0 V battery charge inhibiting function can be selected Products with and without a power-down function can be selected Charger detection function and abnormal charge current detection function The overdischarge hysteresis is released by detecting a negative VM pin voltage (typ. -1.3 V) (Charger detection function) If the output voltage at DO pin is high and the VM pin voltage becomes equal to or lower than the charger detection voltage (typ. -1.3 V), the output voltage at CO pin goes low (Abnormal charge current detection function) Low current consumption Operation: 3.0 µA typ. 5.0 µA max Power-down mode: 0.1 µA max. (9) Wide operation temperature range: -40°C to +85°C (10) Lead-free, Sn 100%, halogen-free
