R5449 Series
High-performance 1-Cell Li-ion Battery Protection IC with Built-in Driver for High-side Nch FETs and Temperature Protection
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Description
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.
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Spec
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: ±3mVDischarge 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: ±2mVCharge 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 Protections / Functions
Temperature Protection Reset Alarm Cell Balance Cascadable Open Wire Detection Wakeup Short-circuit Current Detection Delay Time Shortening -
Technical
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Typical Application (by resistor)
Support for sense current by resistor
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Typical Application (by FET)
Support for sense current by FET
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Quality &
PackagesProduct Name Compatibility Package Marking Reliability R5449Zxxxxx-E2-F/T WLCSP-8-P8 See datasheet R5449Z-F - 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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Sample / Buy
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Buy Online
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Buy, Request for Samples, Request for Information Materials
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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Download Datasheet
Functional Description
Temperature Protection | Temperature Protection |
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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".