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R5449 SeriesNEW

High-performance 1-Cell Li-ion Battery Protection IC with Built-in Driver for High-side Nch FETs and Temperature Protection

  • RoHS

The R5449 is one-cell Li-ion / polymer battery protection IC provides overcharge, overdischarge, discharge / charge overcurrent, and temperature detections. The IC can drive external high-side Nch MOSFETs and provides a high-accuracy detection at overcharge and overcurrent, and a high-accuracy charge inhibition for 0V battery.

Furthermore, the IC can reduce the supply current after overdischarge detection to a minimum by stopping the internal circuits. Using the CTL pin can forcefully enter the IC into standby mode.

Specs & Datasheets

Operating Input Voltage 1.5 V to 5.0 V (Maximum Rating: 6.5 V)
Number of Cells 1
Supply Current Typ. 5.0 µA
Standby Current Max. 0.04 µA
Overcharge Detection Voltage 4.2 V to 4.6 V (0.005 V step)
Overcharge Detection Voltage Accuracy ±10 mV (0°C ≤ Ta ≤ 50°C)
Overcharge Detection Delay Time 1024 ms / 2048 ms / 3072 ms / 4096 ms
Overdischarge Detection Voltage 2.0 V to 3.4 V (0.005 V step)
Overdischarge Detection Voltage Accuracy ±35 mV
Overdischarge Detection Delay Time 16 ms / 32 ms / 128 ms
Discharge Overcurrent Detection Voltage 0.012 V to 0.150 V (0.001 V step)
Discharge Overcurrent Detection Voltage Accuracy 0.012 V to 0.040 V: ±2mV
0.041 V to 0.060 V: ±5%
0.061 V to 0.150 V: ±3mV
Discharge Overcurrent Detection Delay Time 32 ms / 128 ms / 256 ms / 512 ms / 1024 ms
Charge Overcurrent Detection Voltage −0.150 V to −0.012 V (0.001 V step)
Charge Overcurrent Detection Voltage Accuracy −0.150 V to −0.061 V: ±3mV
−0.060 V to −0.041 V: ±5%
−0.040 V to −0.012 V: ±2mV
Charge Overcurrent Detection Delay Time 8 ms
Short Detection Voltage 0.032 V to 0.200 V (0.005V step)
Short Detection Voltage Accuracy ±3 mV
Short Detection Delay Time 280 µs
Conditions for Overcharge Restoration Latch
Conditions for Overdischarge Restoration Latch
Package WLCSP-8-P8
0 V Battery Charge Inhibition
Current Sense Resistor / FET
Thermal Protection Charge and Discharge Current

Download Datasheet

Protections / Functions

Functional Description

Temperature Protection Reset Alarm Cell Balance Cascadable Open Wire Detection Wakeup Short-circuit Current Detection Delay Time Shortening

Technical Documents

Typical Application (by resistor)

Typical Application (by resistor)

Support for sense current by resistor

Typical Application (by FET)

Typical Application (by FET)

Support for sense current by FET

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
WLCSP-8-P8 R5449Z R5449Z-F

Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.

Sample / Buy

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 "Externally Configurable Protections and Their Advantages".

Search for similar products under conditions below.

Category:Lithium-ion Battery Protection ICs

Features Battery Protection
Cell 1
Functions Temperature Protection,Short-circuit Current Detection,Delay Time Shortening