S-8261 Series BATTERY PROTECTION IC FOR 1-CELL PACK www.sii-ic.com SII Semiconductor Corporation, 2001-2016 Rev.5.4 02 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. Features (1) Internal high accuracy voltage detection circuit Overcharge detection voltage 3.900 V to 4.500 V (applicable in 5 mV step) Accuracy: 25 mV (+25C) and 30 mV (5C to +55C) *1 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 2.000 V to 3.000 V (applicable in 10 mV step) Accuracy: 50 mV *2 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 0.050 V to 0.300 V (applicable in 10 mV step) Accuracy: 15 mV Overcurrent 2 detection voltage 0.500 V (fixed) Accuracy: 100 mV (2) High-withstand voltage (VM pin and CO pin: Absolute maximum rating = 28 V) (3) Delay times (overcharge: t , overdischarge: t , overcurrent 1: t , overcurrent 2: t ) are generated by an CU DL lOV1 lOV2 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 is selectable. (6) Power-down function Yes / No is selectable. (7) 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). (8) Low current consumption Operation mode 3.5 A typ., 7.0 A max. Power-down mode 0.1 A max. (9) Wide operating temperature range 40C to +85C *3 (10) Lead-free, Sn 100%, halogen-free *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.) *3. Refer to Product Name Structure for details. Applications Lithium-ion rechargeable battery packs Lithium polymer rechargeable battery packs Package SOT-23-6 1 BATTERY PROTECTION IC FOR 1-CELL PACK S-8261 Series Rev.5.4 02 Block Diagram DP Output control circuit 0 V battery charge circuit Divider control Oscillator control or 0 V battery charge DO circuit circuit inhibition circuit VDD Charger detection circuit CO Overcharge detection comparator Overcurrent 1 detection comparator R VMD VM R Overcurrent 2 VMS detection comparator Overdischarge detection comparator Load short-circuiting detection comparator VSS Remark All the diodes shown in the figure are parasitic diodes. Figure 1 2