R5651 Series
3 to 5 Serial Cell Li-Ion / Li-Polymer Battery Protection IC with Temperature Protection

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  • Description

    The R5651 is an overcharge and discharge protection IC for 3- to 5- series cell Li-ion / Li-polymer rechargeable battery pack, further includes a short-circuit and protection circuits for charge / discharge overcurrent. The R5651 can select any number of cells by applying a certain voltage on the SEL pin.

    Key Benefits

    • Using a current-sense resistor with low resistance ratings: reduction in high temperature in large current and realizing a thermal design of a board easily
    • Separation between charging and discharging paths: achieving low impedance of the battery pack
    • Cascading: achieving simple circuit configuration for battery pack with six-cell and more and reducing external components

  • Spec
    Operating Input Voltage 4.0 V to 25.0 V (Maximum Rating: 30 V)
    Number of Cells 3,4,5
    Supply Current Typ. 13.0 µA
    Standby Current Typ. 6.0 µA
    Overcharge Detection Voltage 3.6 V to 4.5 V (0.005 V Steps)
    Overcharge Detection Voltage Accuracy ±25 mV
    Overcharge Detection Delay Time 1.0 s
    Overdischarge Detection Voltage 2.0 V to 3.2 V (0.005 V Steps)
    Overdischarge Detection Voltage Accuracy ±50 mV
    Overdischarge Detection Delay Time Set by external capacitor
    Discharge Overcurrent Detection Voltage VDET3-1: 0.01 V to 0.15 V (0.005 V Steps)
    VDET3-2: 0.03 V to 0.45 V (0.005 V Steps)
    Discharge Overcurrent Detection Voltage Accuracy VDET3-1: ±3 mV (0.01 V to 0.03 V), ±10% (0.035 V to 0.15 V)
    VDET3-2: ±8 mV (0.03 V to 0.08 V), ±10% (0.09 V to 0.345 V)
    Discharge Overcurrent Detection Delay Time VDET3-1: Set by external capacitor
    VDET3-2: tVDET3-1× 1/10, tVDET3-1× 1/20
    Charge Overcurrent Detection Voltage -0.050 V to -0.008 V (0.005 V Steps)
    Charge Overcurrent Detection Voltage Accuracy ±10% (-0.050 V to -0.030 V)
    ±3 mV (-0.030 V to -0.008 V)
    Charge Overcurrent Detection Delay Time 512 ms, 1024 ms, 2560 ms
    Short Detection Voltage 0.1 V to 0.6 V (0.02 V Steps)
    Short Detection Voltage Accuracy ±30%
    Short Detection Delay Time 330 µs
    Conditions for Overcharge Restoration Auto Release
    Conditions for Overdischarge Restoration Auto Release
    Package TSSOP-24
    0 V Battery Charging Inhibition Voltage 1.1 V, 1.3 V (Accuracy: ±0.2 V)

    Protections / Functions

    Temperature Protection Reset Alarm Cell Balance Cascadable Open Wire Detection Wakeup Short-circuit Current Detection Delay Time Shortening
  • Technical
    • Typical Application Circuit for 5-cell Protection Battery Charger

      Typical Application

      When separated between charging and discharging paths

  • 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".

Search for similar products under conditions below.

Category:Lithium-ion Battery Protection ICs

Features Battery Protection
Cell 3,4,5
Functions Temperature Protection,Cascadable,Open Wire Detection,Short-circuit Current Detection