Описание
The S-8261 Series is a lithium-ion / lithium polymer rechargeable battery protection IC incorporating high-accuracy voltage detection circuit and delay circuits. The S-8261 Series is suitable for protection of single-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 4.5 V (applicable in 5 mV step) Accuracy: ±25 mV (+25°C) and ±30 mV (-5°C to +55°C) Overcharge hysteresis voltage 0.1 V to 0.4 V Accuracy: ±25 mV The overcharge hysteresis voltage can be selected from the range 0.1 V to 0.4 V in 50 mV step Overdischarge detection voltage 2.0 V to 3.0 V (applicable in 10 mV step) Accuracy: ±50 mV Overdischarge hysteresis voltage 0.0 V to 0.7 V Accuracy: ±50 mV The overdischarge hysteresis voltage can be selected from the range 0.0 V to 0.7 V in 100 mV step Overcurrent 1 detection voltage 0.05 V to 0.3 V (applicable in 10 mV step) Accuracy: ±15 mV Overcurrent 2 detection voltage 0.5 V (fixed) Accuracy: ±100 mV High voltage device is used for charger connection pins (VM and CO pins: absolute maximum rating = 28 V) Delay times (overcharge: tCU, overdischarge: tDL, overcurrent 1: tlOV1, overcurrent 2: tlOV2) are generated by an internal circuit. No external capacitor is necessary. Accuracy: ±20% Three-step overcurrent detection circuit is included (overcurrent 1, overcurrent 2 and load short-circuiting) 0 V battery charge function “Available” / “Unavailable” is selectable Power-down function “Yes” / “No” is selectable Charger detection function and abnormal charge current detection function The overdischarge hysteresis is released by detecting negative voltage at the VM pin (-0.7 V typ.) (Charger detection function) When the output voltage of the DO pin is high and the voltage at the VM pin is equal to or lower than the charger detection voltage (-0.7 V typ.), the output voltage of the CO pin goes low (Abnormal charge current detection function) Low current consumption Operation mode 3.5 µA typ., 7.0 µA max Power-down mode 0.1 µA max Wide operating temperature range -40°C to +85°C Lead-free, Sn 100%, halogen-free
