R5487 Series
1-Cell Li-ion Battery Protection IC
Download Datasheet
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Description
The R5487/R5497 Series are high voltage tolerance CMOS-based protection IC for over-charge/discharge and over-current of rechargeable one-cell Lithium-ion (Li+)/Lithium polymer battery. The R5487/R5497 Series can detect over-charge/discharge of Li+ one-cell and excess load current, further include a short circuit protector for preventing large external short circuit current and the excess charge-current.
The R5487/R5497 Series are 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 charged voltage crosses the detector threshold from a low value to a high value.
Output type of COUT and DOUT are CMOS. The R5487 Series have DFN1414-6B and DFN1814-6B.
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Spec
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 
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Technical
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Typical Application
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Quality &
PackagesProduct Name Compatibility Package Marking Reliability R5487L5xxxx-TR DFN1414-6B R5487L5 R5487L5xx R5487L1xxxx-TR DFN1814-6B R5487L1-L4 R5487L1xx - 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 |
|---|---|
| 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".