S-8254AAJFT-TB-G Seiko

S-8254A Series BATTERY PROTECTION IC www.ablic.com FOR 3-SERIAL- OR 4-SERIAL-CELL PACK www.ablicinc.com ABLIC Inc., 2002-2016 Rev.5.2 01 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 *1 Overcharge release voltage n (n 1 to 4) 3.8 V to 4.4 V Accuracy 50 mV Overdischarge detection voltage n (n 1 to 4) 2.0 V to 3.0 V (100 mV step) Accuracy 80 mV *2 Overdischarge release voltage n (n 1 to 4) 2.0 V to 3.4 V 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 V 1.2 V Accuracy 300 mV VC1 (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 Absolute maximum rating : 26 V (7) Wide operating voltage range 2 V to 24 V (8) Wide operating temperature range 40C to 85C (9) Low current consumption During operation 30 A max. ( 25 C) During power-down 0.1 A max. ( 25 C) *3 (10) Lead-free, Sn100%, halogen-free *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 1 BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK S-8254A Series Rev.5.2 01 Block Diagram COP DOP, COP, R , R VMD VMS VDD Control Circuit Delay Circuit VC1 Delay Circuit Delay Circuit 1 M Delay Circuit VMP 900 k VC2 VC3 DOP VC4 VINI CDT 200 nA CCT CTL VSS SEL Remark 1. Diodes in the figure are parasitic diodes. 2. Numerical values are typical values. Figure 1 2