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R5487 Series
1-Cell Li-ion Battery Protection IC
The R5487/R5497 Series is high voltage CMOS-based protection ICs for over-charge/discharge of rechargeable one-cell Lithium-ion/Lithium polymer excess load current, further include a short circuit protector for preventing large external short circuit current and excess charge/discharge-current. The R5487/R5497 Series is composed of four voltage detectors, reference units, a delay circuit, a short circuit protector, an oscillator, a counter, and logic circuits.
The output of Over-charge detector or Excess charge-current detector switches to "L" level after internally fixed delay time, when discharged voltage crosses the detector threshold from a low value to a high value.
Output type of COUT and DOUT are CMOS. The R5487/R5497 Series have DFN1414-6B and DFN1814-6B.
Specs & Datasheets
| Operating Input Voltage | 1.5 V to 5.0 V (Maximum Rating: 12 V) | ||
| Charger Negative Input Voltage | -30 V (Maximum Rating) | ||
| Number of Cells | 1 | ||
| Supply Current | Typ. 3.0 µA | ||
| Standby Current | Max. 0.1 µA (Over-discharge Latch type) Max. 0.5 µA (Over-discharge Auto-release type) |
||
| Overcharge Detection Voltage | 4.2 V to 4.6 V (0.005 V Steps) | ||
| Overcharge Detection Voltage Accuracy | ±20 mV | ||
| Overcharge Detection Delay Time | 1.0 s | ||
| Overdischarge Detection Voltage | 2.0 V to 3.0 V (0.001 V Steps) | ||
| Overdischarge Detection Voltage Accuracy | ±35 mV | ||
| Overdischarge Detection Delay Time | 20 ms | ||
| Discharge Overcurrent Detection Voltage | 0.025 V to 0.150 V (0.001 V Steps) | ||
| Discharge Overcurrent Detection Voltage Accuracy | ±10 mV (VDET3 ≥ 0.100 V) ±10% (0.050 V ≤ VDET3 < 0.100 V) ±5 mV (VDET3 < 0.050 V) |
||
| Discharge Overcurrent Detection Delay Time | 12 ms | ||
| Charge Overcurrent Detection Voltage | -0.15 V to -0.02 V (0.001 V Steps) | ||
| Charge Overcurrent Detection Voltage Accuracy | ±10% (VDET4 ≤ -0.05 V) ±5 mV (VDET4 > -0.05 V) |
||
| Charge Overcurrent Detection Delay Time | 8 ms | ||
| Short Detection Voltage | 0.15 V to 0.40 V (0.005 V Steps) | ||
| Short Detection Voltage Accuracy | 250 µs | ||
| Conditions for Overcharge Restoration | Latch / Voltage Release | ||
| Conditions for Overdischarge Restoration | Latch / Voltage Release | ||
| Package | DFN1814-6B, DFN1414-6B | ||
| 0 V Charge | Available / Unavailable | ||
Protections / Functions
| Temperature Protection | Reset | Alarm | Cell Balance | Cascadable | Open Wire Detection | Wakeup | Short-circuit Current Detection | Delay Time Shortening |
|---|---|---|---|---|---|---|---|---|
 |
|
Technical Documents
Typical Application
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| R5487L5xxxx-TR |
|
DFN1414-6B | R5487L5 | R5487L5xx |
| R5487L1xxxx-TR |
|
DFN1814-6B | R5487L1-L4 | R5487L1xx |
C
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.
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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".