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S-8254AALFT-TB Datasheet(PDF) 1 Page - Seiko Instruments Inc |
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S-8254AALFT-TB Datasheet(HTML) 1 Page - Seiko Instruments Inc |
1 / 29 page S-8254A Series www.sii-ic.com BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK © Seiko Instruments Inc., 2002-2014 Rev.5.1_00 Seiko Instruments Inc. 1 The S-8254A Series is a protection IC for 3-serial- or 4-serial-cell lithium-ion / lithium polymer rechargeable batteries and includes a high-accuracy voltage detector and delay circuit. The S-8254A Series protects both 3-serial or 4-serial cells using the SEL pin for switching. Features (1) High-accuracy voltage detection for each cell • Overcharge detection voltage n (n = 1 to 4) 3.9 V to 4.4 V (50 mV step) Accuracy ±25 mV • Overcharge release voltage n (n = 1 to 4) 3.8 V to 4.4 V *1 Accuracy ±50 mV • Overdischarge detection voltage n (n = 1 to 4) 2.0 V to 3.0 V (100 mV step) Accuracy ±80 mV • Overdischarge release voltage n (n = 1 to 4) 2.0 V to 3.4 V *2 Accuracy ±100 mV (2) Three-level overcurrent protection • Overcurrent detection voltage 1 0.05 V to 0.30 V (50 mV step) Accuracy ±25 mV • Overcurrent detection voltage 2 0.5 V Accuracy ±100 mV • Overcurrent detection voltage 3 VVC1 − 1.2 V Accuracy ±300 mV (3) Delay times for overcharge detection, overdischarge detection and overcurrent detection 1 can be set by external capacitors (delay times for overcurrent detection 2 and 3 are fixed internally). (4) Switchable between a 3-serial cell and 4-serial cell using the SEL pin (5) Charge/discharge operation can be controlled via the control pins. (6) High-withstand voltage device Absolute maximum rating : 26 V (7) Wide operating voltage range 2 V to 24 V (8) Wide operating temperature range −40°C to + 85°C (9) Low current consumption • During operation 30 μA max. (+25°C) • During power-down 0.1 μA max. (+25°C) (10) Lead-free, Sn100%, halogen-free *3 *1. Overcharge hysteresis voltage n (n = 1 to 4) can be selected as 0 V or from a range of 0.1 V to 0.4 V in 50 mV steps. (Overcharge hysteresis voltage = Overcharge detection voltage − Overcharge release voltage) *2. Overdischarge hysteresis voltage n (n = 1 to 4) can be selected as 0 V or from a range of 0.2 V to 0.7 V in 100 mV steps. (Overdischarge hysteresis voltage = Overdischarge release voltage − Overdischarge detection voltage) *3. Refer to “ Product Name Structure” for details. Applications • Lithium-ion rechargeable battery packs • Lithium polymer rechargeable battery packs Package • 16-Pin TSSOP |
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