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.
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) |
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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) |
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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. 1/80 |
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Overcharge Restoration Voltage | VDET1 to VDET1−0.4 V (0.05 V Steps) Min. 4.15 V |
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Package | 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 |
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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".
Technical Documents
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Typical Application: 4-cell Protection Circuit (CMOS Output, Active-high)
Note: Connect the pins in the following order: B-, B3, B2, B1, and B+.
RVDD: 100 Ω, R1~4: 1000 Ω, CVDD,C1~4,CVROUT: 0.1 µF
Quality & Packages
Product Name | Compatibility | Package | Marking | Reliability |
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R5439Kxxxxx-TR |
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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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R5439 Series