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R5438 Series
1-Cell to 3-Cell Li-ion Battery Second Protection IC
The R5438 is an overcharge protection IC for 1 to 3 serial cells Li-ion / Li-polymer rechargeable battery. This device provides the high-accuracy voltage detection function and the shutdown function can reduce the supply current to the minimum when all cell’s voltage becomes less than the shutdown detection voltage.
Specs & Datasheets
| Operating Input Voltage | 1.5 V to 20 V or VC1 +5 V (Maximum Rating: 26 V) | ||
| Number of Cells | 1,2,3 | ||
| Supply Current | Typ. 0.85 µA | ||
| Shutdown Detection Voltage | 3.5 V ±0.3 V | ||
| Shutdown Current | Max. 0.1 µA | ||
| Overcharge Detection Voltage | 4.10 V to 4.60 V (0.005 V Steps) | ||
| Overcharge Detection Voltage Accuracy | ±20 mV | ||
| Overcharge Detection Delay Time | 1 s, 2 s, 4 s, 6 s With Delay Time Shortening, the delay time can be reduced to approx. 1/90 |
||
| Overcharge Restoration Voltage | VDET1 to VDET1−0.5 V (0.05 V Steps) | ||
| Conditions for Overcharge Restoration | Voltage Release | ||
| Package | DFN1814-6C | ||
Protections / Functions
| Temperature Protection | Reset | Alarm | Cell Balance | Cascadable | Open Wire Detection | Wakeup | Short-circuit Current Detection | Delay Time Shortening |
|---|---|---|---|---|---|---|---|---|
 |
Technical Documents
Typical Application: Normal Mode (CMOS Output, Active-high)
Note 1: As for the order of cell's connection, connect a positive terminal of CELL1 as the end terminal.
Note 2: In Delay Shortening (DS) mode, applying a voltage of 4V between VDD and VC1 is required.
RVDD: 100 Ω, R1 to R3: 1000 Ω, CVDD,C1 to C3: 0.1 µF
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| R5438LxxxxA-TR |
|
DFN1814-6C | R5438L | R5438L |
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Please contact us or our distributors for unpublished reliability information.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
Buy Online
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".