Описание
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.
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 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 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) 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 High-withstand voltage Absolute maximum rating : 26 V Wide operating voltage range 2 V to 24 V Wide operating temperature range -40°C to + 85°C Low current consumption During operation 30 µA max. (+25°C) During power-down 0.1 µA max. (+25°C) Lead-free, Sn100%, halogen-free
