R5497 Series
1-Cell Li-ion Battery Protection IC

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  • Description

    The R5487/R5497 Series are high voltage tolerance CMOS-based protection IC for over-charge/discharge and over-current of rechargeable one-cell Lithium-ion (Li+)/Lithium polymer battery. The R5487/R5497 Series can detect over-charge/discharge of Li+ one-cell and excess load current, further include a short circuit protector for preventing large external short circuit current and the excess charge-current.

    The R5487/R5497 Series are composed of four voltage detectors, reference units, a delay circuit, a short circuit protector, an oscillator, a counter, and logic circuits.

    The output of Over-charge detector or Excess charge-current detector switches to "L" level after internally fixed delay time, when charged voltage crosses the detector threshold from a low value to a high value.

    Output type of COUT and DOUT are CMOS. The R5497 Series have DFN1414-6B.

  • Spec
    Operating Input Voltage 1.5 V to 5.0 V (Maximum Rating: 12 V)
    Charger Negative Input Voltage -30 V (Maximum Rating)
    Number of Cells 1
    Supply Current Typ. 3.0 µA
    Standby Current Max. 0.1 µA (Over-discharge Latch type)
    Max. 0.5 µA (Over-discharge Auto-release type)
    Overcharge Detection Voltage 4.2 V to 4.6 V (0.005 V Steps)
    Overcharge Detection Voltage Accuracy ±20 mV
    Overcharge Detection Delay Time 1.0 s
    Overdischarge Detection Voltage 2.0 V to 3.0 V (0.001 V Steps)
    Overdischarge Detection Voltage Accuracy ±35 mV
    Overdischarge Detection Delay Time 20 ms
    Discharge Overcurrent Detection Voltage 0.025 V to 0.150 V (0.001 V Steps)
    Discharge Overcurrent Detection Voltage Accuracy ±10 mV (VDET3 ≥ 0.100 V)
    ±10% (0.050 V ≤ VDET3 < 0.100 V)
    ±5 mV (VDET3 < 0.050 V)
    Discharge Overcurrent Detection Delay Time 12 ms
    Charge Overcurrent Detection Voltage -0.15 V to -0.02 V (0.001 V Steps)
    Charge Overcurrent Detection Voltage Accuracy ±10% (VDET4 ≤ -0.05 V)
    ±5 mV (VDET4 > -0.05 V)
    Charge Overcurrent Detection Delay Time 8 ms
    Short Detection Voltage 0.15 V to 0.40 V (0.005 V Steps)
    Short Detection Voltage Accuracy 250 µs
    Conditions for Overcharge Restoration Latch / Voltage Release
    Conditions for Overdischarge Restoration Latch / Voltage Release
    Package DFN1414-6B
    0 V Charge Available / Unavailable

    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 Short-circuit Current Detection,Delay Time Shortening