NB7143 Series
1-cell Li-ion Battery Protection IC with High-accuracy Overcurrent Detection

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  • Description

    The NB7143 is a one-cell Li- ion / polymer battery protection IC providing overcharge, overdischarge and charge / discharge overcurrent detections and it provides a wide range in the overcurrent detection.

    The low standby current can achieve longer driving time with a battery of small capacity. In the current detection FET sense type of the NB7143, it improves safety with its high accuracy of over current and short circuit detection.

  • Spec
    Operating Input Voltage 1.5 V to 5.0 V (Maximum Rating: 12 V)
    Number of Cells 1
    Supply Current Typ. 1.5 µA
    Standby Current Max. 0.04 µA (VDET2: Latch type)
    Max. 0.50 µA (VDET2: Auto release type)
    Overcharge Detection Voltage 4.2 V to 4.8 V (5 mV Step)
    Overcharge Detection Voltage Accuracy ±20 mV
    Overcharge Detection Delay Time 1024 ms
    Overdischarge Detection Voltage 2.0 V to 3.0 V (50 mV Step)
    Overdischarge Detection Voltage Accuracy ±50 mV
    Overdischarge Detection Delay Time 64 ms, 128 ms
    Discharge Overcurrent Detection Voltage 0.0150 V to 0.1500 V (0.5 mV Step)
    Discharge Overcurrent Detection Voltage Accuracy ±3 mV (0.015 V to 0.060 V)
    ±5% (0.060 V to 0.100 V)
    ±5 mV (0.100 V to 0.150 V)
    Discharge Overcurrent Detection Delay Time 12 ms, 128 ms
    Charge Overcurrent Detection Voltage -0.150 V to -0.020 V (0.5 mV Step)
    Charge Overcurrent Detection Voltage Accuracy ±3 mV (-0.060 V to -0.020 V)
    ±5% (-0.100 V to -0.060 V)
    ±5 mV (-0.150 V to -0.100 V)
    Charge Overcurrent Detection Delay Time 8 ms, 17 ms
    Short Detection Voltage 0.060 V to 0.400 V (5 mV Step)
    Short Detection Voltage Accuracy ±5%
    Short Detection Delay Time 0.3 ms
    Conditions for Overcharge Restoration Auto Release / Latch
    Conditions for Overdischarge Restoration Auto Release / Latch
    Package DFN1814-6-GN
    0 V Battery Charging Permission / Inhibition

    Protections / Functions

    Temperature Protection Reset Alarm Cell Balance Cascadable Open Wire Detection Wakeup Short-circuit Current Detection Delay Time Shortening
  • Technical
    • Typical Application

      Typical Application

  • Quality &
    • Refer to the datasheets for the details on the product.
    • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

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Functional Description

Temperature Protection Temperature Protection
Reset Reset Function
Alarm Alarm Function
Cell Balance Cell Balance Function
Cascadable Cascade Connect Function
Open Wire Detection Open Wire Detect Function
Wakeup Wakeup Function
Short-circuit Current Detection Short-circuit Current Protection
Delay Time Shorting Output Delay Time Short Function

For more details, please refer to "Protecting Li-ion Batteries: Functions and Advantages".

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Category:Lithium-ion Battery Protection ICs

Features Battery Protection
Cell 1
Functions Short-circuit Current Detection