ABLIC S-82K4AAA-A8T8U

This IC is used for secondary protection of lithium-ion rechargeable batteries, and incorporates high-accuracy voltage detection circuits and delay circuits. The S-82K3 Series enable connection of 3-serial cell, and the S-82K4 Series enable connection of 4-serial cell. This IC provides a wake-up function to prevent the fuse from blowing during battery connection, and allows the lithium battery to be connected in any order. Since this IC also comes with a constant voltage output circuit, it can be used as a constant-voltage power supply for an external RTC (Real-Time clock IC).

• High-accuracy voltage detection circuit for each cell
  • Overcharge detection voltage n: 3.600 V to 4.800 V (5 mV step)
    • Accuracy ±15 mV (Ta = +25°C)
    • Accuracy ±20 mV (Ta = -10°C to +60°C)
  • Overcharge release voltage: 3.600 V to 4.800 V, Accuracy ±50 mV
  • VRTC pin shutdown voltage n: 2.500 V to 2.800 V (100 mV step), Accuracy ±50 mV
• The wake-up function monitoring battery connection prevents CO pin output errors during battery connection
• Delay times for overcharge detection are generated only by an internal circuit (external capacitors are unnecessary)
  • Overcharge detection delay time, VRTC pin shutdown delay time: 1 s, 2 s, 4 s, 6 s
• Overcharge timer reset function: Available, unavailable
• CO pin output voltage is limited to 7.5 V max.
• VRTC pin output voltage: 1.800 V to 3.300 V (100 mV step), Accuracy ±2% (Ta = +25°C)
• VRTC pin output current: 2 mA max.
• Wide operation temperature range: Ta = -40°C to +85°C
• Low current consumption
  • During operation (Vc - 1.0 V for each cell): 4.0 μA max.
  • During VRTC pin shutdown (VRSD - 1.0 V for each cell): 1.0 μA max.
• Lead-free (Sn 100%), halogen-free

• Lithium-ion rechargeable battery packs (for secondary protection)