The S-8254A series is a protection IC for 3-serial or 4-serial cell lithium ion rechargeable batteries and includes a high-accuracy voltage detector and delay circuit.
The S-8254 series protects both 3-serial or 4-serial cells using the SEL pin for switching.
Features
- High-accuracy voltage detection for each cell
- Overcharge detection voltage n(n=1 to 4): 3.90 V to 4.45 V (50 mV steps) Accuracy ±25 mV
- Overcharge release voltage n(n=1 to 4): 3.80 V to 4.45 V Accuracy ±50 mV
- Overdischarge detection voltage n(n =1 to 4): 2.0 V to 3.0 V (100 mV steps) Accuracy ±80mV
- Overdischarge release voltage n(n=1 to 4): 2.0 V to 3.4 V Accuracy ±100 mV
- Three-level overcurrent protection
- Overcurrent detection voltage 1: 0.05 V to 0.3 V (50 mV steps) 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
- Charge/discharge operation can be controlled via the control pins.
- 0 V battery charge
- Enabled, inhibited
- Power-down function
- Available
- 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
- Operation mode 30 µA max.(+25°C),
- Power-down mode 0.1 µA max. (+25°C)
- Lead-free, Sn100%, halogen-free
Applications
- Lithium-ion rechargeable battery packs
- Lithium polymer rechargeable battery packs
Standard Circuit
