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R5439 Series
2-Cell to 4-Cell Li-ion Battery Second Protection IC with VR
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.
Specs & Datasheets
| 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. 1/80 |
||
| Overcharge Restoration Voltage | VDET1 to VDET1−0.4 V (0.05 V Steps) Min. 4.15 V |
||
| Package | DFN(PLP)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 Documents
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 |
|---|---|---|---|---|
| R5439Kxxxxx-TR |
|
DFN(PLP)2020-8 | R5439K | R5439K |
C
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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Please contact us or our distributors for unpublished reliability information.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
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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.
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".