NB7120 Series
1-cell Li-ion Battery Protection IC for High-side FETS

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  • Description

    The NB7120ZA is one-cell Li-ion/Li-polymer rechargeable battery protection IC features highaccuracy over-charge/discharge, overcurrent and temperature protections for external high-side FETs and a sense resistor.

    The NB7120ZA can detect over-charge/discharge and load overcurrent, further includes a short circuit protector for preventing large external short circuit current. It is possible to detect the temperature by connecting a thermistor.

  • Spec
    Operating Input Voltage 1.5 V to 5.0 V (Maximum Rating: 6.5 V)
    Number of Cells 1
    Supply Current Typ. 5.0 µA
    Standby Current Max. 0.04 µA
    Overcharge Detection Voltage 4.2 V to 4.6 V (0.005 V Step)
    Overcharge Detection Voltage Accuracy ±10 mV
    Overcharge Detection Delay Time 1024 ms, 2048 ms, 3072 ms, 4096 ms
    Overdischarge Detection Voltage 2.0 V to 3.4 V (0.005 V Step)
    Overdischarge Detection Voltage Accuracy ±35 mV
    Overdischarge Detection Delay Time 16 ms, 32 ms, 128 ms
    Discharge Overcurrent Detection Voltage 0.0080 V to 0.0800 V (0.0001 V Step)
    Discharge Overcurrent Detection Voltage Accuracy ±1.5 mV (0.0080 V to 0.0300 V), ±5 % (0.0301V to 0.0600 V), ±3 mV (0.0601V to 0.0800 V)
    Discharge Overcurrent Detection Delay Time 32 ms, 128 ms, 256 ms, 512 ms, 1024 ms,
    Charge Overcurrent Detection Voltage -0.0800 V to -0.0080 V (0.0001 V Step)
    Charge Overcurrent Detection Voltage Accuracy ±3 mV (-0.0800V to -0.0601 V), ±5 % (-0.0600V to -0.0326 V), ±1.5 mV (-0.0325 V to -0.0080 V)
    Charge Overcurrent Detection Delay Time 8 ms, 16 ms, 16.5 ms, 32 ms
    Short Detection Voltage 0.025 V to 0.125 V (0.001 V Step)
    Short Detection Voltage Accuracy ±2.5 mV
    Short Detection Delay Time 0.28 ms
    Conditions for Overdischarge Restoration Latch
    Package WLCSP-8-P15
    0 V Battery Charging 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.

Download Datasheet

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 Temperature Protection,Short-circuit Current Detection,Delay Time Shortening