R5464 Series
High Accuracy 2-Cell Li-ion Battery Protection IC with Alarm Function

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  • Description

    The R5464 is a CMOS-based over-charge/ over-discharge protector for 2-cell Li-Ion batteries that can produce a high-accuracy alarm-signal. The R5464 has an alarm signal output, a temperature detection, an over-charge voltage detection, an over-discharge voltage/ discharge overcurrent detection and a charge overcurrent detection.

    The R5464 is composed of eight voltage detectors, a temperature detector, a reference unit, a delay circuit, a short circuit protector, an oscillator, a counter, and a logic circuit. When the over-charge voltage or over-charge current is detected, the battery voltage crosses the each detector threshold, the output of COUT pin switches to “L” level after internal fixed delay time. The output of DOUT pin, the output of the over-discharge detector and the discharge overcurrent detector, switches to “L” level after internally fixed delay time, when discharged voltage crosses the detector threshold. The output type of COUT and DOUT is CMOS. The output type of AOUT is Pch open drain.

  • Spec
    Operating Input Voltage 1.5 V to 10.0 V (Maximum Rating: 30 V)
    Charger Negative Input Voltage -30 V
    Number of Cells 2
    Supply Current R5464KxxxAD/DD: Typ. 6.0 µA
    R5464KxxxCG: Typ. 5.0 µA
    Standby Current Max. 0.1 µA
    Overcharge Detection Voltage 3.6 V to 4.5 V (0.005 V Steps)
    Overcharge Detection Voltage Accuracy +10 mV/ −15 mV
    Overcharge Detection Delay Time 1.0 s
    Overdischarge Detection Voltage 2.0 V to 3.0 V (0.005 V Steps)
    Overdischarge Detection Voltage Accuracy ±2.5%
    Overdischarge Detection Delay Time 128 ms
    Discharge Overcurrent Detection Voltage 0.05 V to 0.24 V (0.005 V steps)
    Discharge Overcurrent Detection Voltage Accuracy ±15 mV
    Discharge Overcurrent Detection Delay Time R5464KxxxAD/DD: 12 ms
    R5464KxxxCG: 16 ms
    Charge Overcurrent Detection Voltage -0.22 V to -0.1 V (0.005 V steps)
    Charge Overcurrent Detection Voltage Accuracy ±20 mV
    Charge Overcurrent Detection Delay Time 8 ms
    Short Detection Voltage 1.0 V
    Short Detection Voltage Accuracy ±0.4 V
    Short Detection Delay Time 300 µs
    Alarm Detection Voltage 3.2 V to 4.4 V (0.005 V Steps)
    Alarm Detection Voltage Accuracy +10 mV/ −15 mV
    Alarm Detection Delay Time R5464KxxxAD/CG: 6 ms
    R5464KxxxDD: 36 ms
    Alarm Restoration Hysteresis Voltage −0 V to −0.25 V (0.01 V Steps)
    Conditions for Overcharge Restoration Voltage Release
    Conditions for Overdischarge Restoration Latch
    Package DFN(PL)2527-10
    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 2
Functions Alarm,Short-circuit Current Detection,Delay Time Shortening