R5494 Series
1-Cell Li-Ion Battery Protection IC

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  • Description

    The R5494 is a high voltage tolerance CMOS-based protection IC for Over-charge / discharge and Overcurrent of a rechargeable one-cell Lithium-ion (Li+) / Lithium polymer battery. The R5494 can detect Over-charge / discharge of the Li+ one-cell, Excess load current, and Charge-current. And, the R5494 has a short circuit detector for preventing large external short circuit current. The R5494 consists of four voltage detectors, a reference unit, a delay circuit, a short circuit detector, an oscillator, a counter, and logic circuits.

  • Spec
    Operating Input Voltage 1.5 V to 5.0 V (Maximum Rating: 12 V)
    Number of Cells 1
    Supply Current Typ. 3.0 µA
    Standby Current Max. 0.5 µA
    Overcharge Detection Voltage 4.1 V to 4.5 V (0.005 V step)
    Overcharge Detection Voltage Accuracy ±20 mV
    Overcharge Detection Delay Time 1.0 s
    Overdischarge Detection Voltage 2.1 V to 3.0 V (0.050 V step)
    Overdischarge Detection Voltage Accuracy ±35 mV
    Overdischarge Detection Delay Time 128 ms
    Discharge Overcurrent Detection Voltage 0.030 V to 0.048 V (0.001 V step)
    Discharge Overcurrent Detection Voltage Accuracy ±10% or ±4 mV
    Discharge Overcurrent Detection Delay Time 8 ms
    Charge Overcurrent Detection Voltage -0.030 V to -0.020 V (0.001 V step)
    Charge Overcurrent Detection Voltage Accuracy ±15%
    Charge Overcurrent Detection Delay Time 9 ms
    Short Detection Voltage VDET3 = 0.030 V to 0.047 V : VDET3 x 3
    VDET3 = 0.048 V : VDET3 x 3 -1mV
    Short Detection Delay Time 200 µs (tVDET3 = 8 ms)
    Conditions for Overcharge Restoration Voltage Release
    Conditions for Overdischarge Restoration Voltage Release
    Package DFN1814-6C
    0 V Charge Optional

    Protections / Functions

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