R5471 Series
High Accuracy 1-Cell Li-ion Battery Protection IC

  • Description

    The R5471 is high voltage CMOS-based protection ICs for over-charge/discharge of rechargeable one-cell Lithium-ion/Lithium polymer excess load current, further include a short circuit protector for preventing large external short circuit current and excess charge/discharge-current.

    Each of these ICs is composed of four voltage detectors, reference units, a delay circuit, a short circuit protector, an oscillator, a counter, and logic circuits.

  • Spec
    Operating Input Voltage 1.5 V to 5.0 V (Maximum Rating: 12 V)
    Charger Negative Input Voltage -30 V
    Number of Cells 1
    Supply Current Typ. 4.0 µA
    Standby Current Typ. 0.1 µA
    Overcharge Detection Voltage 4.1 V to 4.5 V
    Overcharge Detection Voltage Accuracy ±10 mV
    Overcharge Detection Delay Time 1 s
    Overdischarge Detection Voltage 2.0 V to 3.0 V
    Overdischarge Detection Voltage Accuracy ±2.5%
    Overdischarge Detection Delay Time 20 ms
    Discharge Overcurrent Detection Voltage 0.05 V to 0.13 V
    Discharge Overcurrent Detection Voltage Accuracy ±10 mV
    Discharge Overcurrent Detection Delay Time 36 ms
    Charge Overcurrent Detection Voltage -0.17 V to -0.05 V
    Charge Overcurrent Detection Voltage Accuracy ±20 mV
    Charge Overcurrent Detection Delay Time 16 ms
    Short Detection Voltage 0.35 V
    Short Detection Delay Time 600 µs
    Conditions for Overcharge Restoration Latch
    Conditions for Overdischarge Restoration Latch
    Package DFN1814-6
    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

      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