R5436 Series
3-Cell to 5-Cell Li-ion Battery Protection IC with Thermal Protection

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  • Description

    The R5436 is an overcharge, overdischarge and overcurrent protection IC for Li-ion or Li-polymer secondary battery. Overcharge, Overdischarge, Charge Overcurrent and Discharge Overcurrent for 3 to 5 serial cells can be detected. By cascade connection using the R5436, it is also possible to protect 6-serial or more cells rechargeable battery pack. The R5436 provides a cell-balancing function to equalize imbalance between cells, and it provides an open-wire detection to detect a broken wire between a battery and the circuit board. The open-wire detection is optionally selectable.

  • Spec
    Operating Input Voltage 2.5 V to 25 V (Maximum Rating: 30 V)
    Charger Negative Input Voltage 30 V (Maximum Rating)
    Number of Cells 3,4,5
    Supply Current Typ. 12.0 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
    Overcharge Restoration Voltage VDET1 -0.1 V to VDET1 -0.4 V (0.01 V Steps)
    Overdischarge Detection Voltage 2.0 V to 3.2 V (0.005 V Steps)
    Overdischarge Detection Voltage Accuracy ±2.5%
    Overdischarge Detection Delay Time Adjustable with an external capacitor
    Discharge Overcurrent Detection Voltage VDET31: 0.05 V to 0.25 V (0.01 V Steps)
    VDET32: VDET31 x 3
    Discharge Overcurrent Detection Voltage Accuracy VDET31: ±15 mV (VDET31 ≤ 0.15V) / ±20 mV (VDET31 > 0.15V)
    VDET32: ±25 mV (VDET31 ≤ 0.10V) / ±50 mV (VDET31 > 0.10V)
    Discharge Overcurrent Detection Delay Time Adjustable with an external capacitor
    Charge Overcurrent Detection Voltage -0.2 V, -0.1 V, -0.05 V
    Charge Overcurrent Detection Voltage Accuracy ±15 mV (VDET4= -0.05V / -0.1V) / ±30 mV (VDET4 = -0.2V)
    Charge Overcurrent Detection Delay Time 8 ms
    Short Detection Voltage 0.25 V to 1.0 V (0.02 V Steps)
    Short Detection Delay Time 300 µs
    Conditions for Overcharge Restoration Voltage Release
    Conditions for Overdischarge Restoration Latch / Voltage Release
    Package TSSOP-28
    Cell Balancing Detection Voltage (VCBD) 3.45 V to 4.45 V (0.005 V Steps)
    Cell Balancing Release Voltage VCBD to VCBD -0.4 V (0.01 V Steps)
    0 V Charge Available
    •  1 VDET31: Set to meet the following equation: (3×VDET31+0.05<0.8×VSHORT).
    • 2 VDET32 is not detected when VDET32 is higher than VSHORT.

    Protections / Functions

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

      5-cell Protection Battery Charger with Cell-balancing Enabled
  • 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".

Search for similar products under conditions below.

Category:Lithium-ion Battery Protection ICs

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