The S-8265C Series is a voltage monitoring IC with a cell balancing function, which includes high-accuracy voltage detection circuits, delay circuits, and FETs for cell balancing discharge. The cell balancing function is effective for balancing the voltage of serially connected batteries. Short-circuiting between cells enables cell balancing for serial connection of three cells to five cells.
Features
- High-accuracy voltage detection circuit for each cell
- Cell balancing detection voltage n (n = 1 to 5): 2.700 V to 4.650 V (5 mV step)
Accuracy ±20 mV (Ta = +25°C)
Accuracy ±25 mV (Ta = -10°C to +60°C) - Cell balancing release voltage n (n = 1 to 5)*1: 2.700 V to 4.650 V
Accuracy ±50 mV (Ta = +25°C) - Overcharge detection voltage n (n = 1 to 5)*2: 2.750 V to 4.700 V (5 mV step)
Accuracy ±20 mV (Ta = +25°C)
Accuracy ±25 mV (Ta = -10°C to +60°C) - Overcharge release voltage n (n = 1 to 5)*3, *4: 2.750 V to 4.700 V
Accuracy ±50 mV (Ta = +25°C) - Built-in cell balancing discharging FET for each cell
- Output form
- CMOS output, Nch open-drain output
- Output logic
- Active "H", active "L"
- Built-in test mode function to check cell balancing detection voltage and overcharge detection voltage with shortened delay time
- High-withstand voltage
- Absolute maximum rating 28 V
- Wide operation voltage range
- 3.6 V to 26 V
- Wide operation temperature range
- Ta = -40°C to +85°C
- Low current consumption
- During operation: 0.3 µA typ., 0.7 µA max. (Ta = +25°C)
- Lead-free (Sn 100%), halogen-free
*1. Cell balancing release voltage = Cell balancing detection voltage + Cell balancing hysteresis voltage
(Cell balancing hysteresis voltage can be selected from a range of 0 mV to -400 mV in 50 mV step.)
*2. Satisfy Overcharge detection voltage ≧ Cell balancing detection voltage + 50 mV when selecting them.
*3. Overcharge release voltage = Overcharge detection voltage + Overcharge hysteresis voltage
(Overcharge hysteresis voltage can be selected from a range of 0 mV to -400 mV in 50 mV step.)
*4. Satisfy Overcharge release voltage ≧ Cell balancing release voltage + 50 mV when selecting them.
Applications
- Lithium-ion rechargeable battery pack