R5439 Series
2-Cell to 4-Cell Li-ion Battery Second Protection IC with VR
R5439 Series
2-Cell to 4-Cell Li-ion Battery Second Protection IC with VR
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Description
The R5439 is an overcharge protection IC for 2 to 4 serial cell Li-ion or Li-polymer secondary battery. Internally, the R5439 consists of high-accuracy voltage detection circuit, a delay circuit, and a voltage regulator for operating the external real-time clock. The two-stage shut-down detection circuit can reduce the supply current to the minimum.
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Spec
Operating Input Voltage 4.0 V to 25 V or VC1 +5 V (Maximum Rating: 32 V) Number of Cells 2,3,4 Supply Current Typ. 4.0 µA (VCELLn = 4.15V)
Typ. 2.5 µA (VCELLn = 3.1V)Standby Current Typ. 0.2 µA Shutdown Detection Voltage VSHT1: 3.8 V ±0.3 V
VSHT2: 2.3 V to 2.8 V ±0.05 V (0.1V Steps)Overcharge Detection Voltage 4.20 V to 4.60 V (0.005 V Steps) Overcharge Detection Voltage Accuracy ±20 mV Overcharge Detection Delay Time 1.5 s, 2 s, 4 s, 6 s
With Delay Time Shortening, the time can be reduced to approx. 1/80Overcharge Restoration Voltage VDET1 to VDET1−0.4 V (0.05 V Steps)
Min. 4.15 VPackage DFN(PL)2020-8 Built-in Regulator Output Voltage 2.9 V to 3.7 V (0.1 V Steps) Built-in Regulator Output Accuracy ±2.0% 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: 4-cell Protection Circuit (CMOS Output, Active-high)
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Quality &
PackagesProduct Name Compatibility Package Marking Reliability R5439Kxxxxx-TR DFN(PL)2020-8 See datasheet R5439K - 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".