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S-8261ABPMD-G3P-T2 Datasheet(PDF) 1 Page - Seiko Instruments Inc |
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S-8261ABPMD-G3P-T2 Datasheet(HTML) 1 Page - Seiko Instruments Inc |
1 / 36 page Rev.1.9_00 BATTERY PROTECTION IC FOR SINGLE-CELL PACK S-8261 Series Seiko Instruments Inc. 1 The S-8261 series are lithium-ion / lithium polymer rechargeable battery protection ICs incorporating high- accuracy voltage detection circuit and delay circuit. The S-8261 series are suitable for protection of single-cell lithium ion/lithium polymer battery packs from overcharge, overdischarge and overcurrent. Features (1) Internal high accuracy voltage detection circuit • Overcharge detection voltage 3.9 V to 4.4 V (applicable in 5 mV step) Accuracy: ±25 mV (+25 °C) and ±30 mV (−5 °C to +55 °C) • Overcharge hysteresis voltage 0.0 V to 0.4 V *1 Accuracy: ±25 mV The overcharge hysteresis voltage can be selected from the range 0.0 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 *2 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 (2) High voltage device is used for charger connection pins (VM and CO pins: absolute maximum rating = 28 V) (3) 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% (4) Three-step overcurrent detection circuit is included. (overcurrent 1, overcurrent 2 and load short-circuiting) (5) 0 V battery charge function “available” / “unavailable” are selectable. (6) 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) (7) Low current consumption • Operation mode 3.5 µA typ., 7.0 µA max. • Power-down mode 0.1 µA max. (8) Wide operating temperature range −40 °C to +85 °C (9) Small package SOT-23-6, 6-Pin SNB(B) *1. Overcharge release voltage = Overcharge detection voltage − Overcharge hysteresis voltage (where overcharge release voltage < 3.8 V is prohibited.) *2. Overdischarge release voltage = Overdischarge detection voltage + Overdischarge hysteresis voltage (where overdischarge release voltage > 3.4 V is prohibited.) Applications • Lithium-ion rechargeable battery packs • Lithium polymer rechargeable battery packs |
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