The S-8244 series is used for secondary protection of lithium-ion batteries with from one to four cells, and incorporates a high-precision voltage detector circuit and a delay circuit. Short-circuits between cells accommodate series connection of one to four cells.
Features
- Internal high-precision voltage detector circuit
- 1) Overcharge detection voltage range:
3.70 to 4.50V(at a 5 mV/step): Accuracy of ± 25mV (at +25°C), Accuracy ±50mV (at -40 to +85°C),
2) Hysteresis: 5 optional models available and selectable:
0.38 ± 0.1V, 0.25 ± 0.07V, 0.13 ± 0.04V, 0.045 ± 0.02V, None - High-withstand voltage
- Absolute maximum rating: 26V
- Wide operating voltage range
- 3.6V to 24V (refers to the range in which the delay circuit can operate normally after overvoltage is detected)
- Delay time during detection
- Can be set by an external capacitor.
- Low current consumption
- At 3.5V for each cell: 3.0 µA max. (+25°C),
At 2.3V for each cell: 2.4 µA max. (+25°C) - Output logic and form – 5 types
- CMOS output active “H”
CMOS output active “L”
Pch open drain output active “L”
Nch open drain output active “H”
Nch open drain output active “L”
(CMOS / Nch open drain output for 0.045 V hysteresis models) - Lead-free (Sn 100%), halogen-free
Applications
- Secondary protection of lithium ion rechargeable batteries
Standard Circuit
