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Overview - S-8242B series

Battery Protection IC for 2-Serial-Cell Pack S-8242B series

The S-8242B Series are protection ICs for 2-serial-cell lithium-ion/lithium-polymer rechargeable batteries and include high-accuracy voltage detectors and delay circuits.
These ICs are suitable for protecting 2-cell rechargeable lithium-ion/lithium-polymer battery packs from overcharge, overdischarge, and overcurrent.

DATA SHEET
2009.4.13

Features


    • High-accuracy voltage detection for each cell
      •Overcharge detection voltage n (n =1, 2): 3.9 V to 4.5 V (50 mV steps) Accuracy ±25 mV
      •Overcharge release voltage n (n =1, 2): 3.8 V to 4.5 V *1
      Accuracy ±50 mV
      •Overdischarge detection voltage n (n =1, 2): 2.0 V to 3.0 V (100 mV steps) Accuracy ±50 mV
      •Overdischarge release voltage n (n =1, 2): 2.0 V to 3.4 V *2 Accuracy ±100 mV
      *1. Overcharge release voltage =Overcharge detection voltage -Overcharge hysteresis voltage
      *2. Overdischarge release voltage =Overdischarge detection voltage +Overdischarge hysteresis voltage
    • Two-level overcurrent detection (overcurrent 1, overcurrent 2)
      •Overcurrent detection voltage 1: 0.05 V, 0.08 V to 0.30 V (10 mV steps) Accuracy ±15 mV
      •Overcurrent detection voltage 2: 1.2 V (fixed) Accuracy ±300 mV
    • Delay times (overcharge, overdischarge, overcurrent) are generated by an internal circuit (external capacitors are unnecessary).
    • 0 V battery charge function available/unavailable are selectable.
    • Charger detection function
    • High-withstanding-voltage devices:
      Absolute maximum rating: 28 V
    • Wide operating temperature range:
      -40°C to +85°C
    • Low current consumption
      •Operation mode
      10 µA max. (+25°C)
      •Power-down mode
      0.1 µA max. (+25°C)
    • Package: SNT-8A, 8-pin TSSOP
    • Lead-free products

Applications


    • Lithium-ion rechargeable battery packs
    • Lithium-polymer rechargeable battery packs

Standard Circuit