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R5487 Series

1-Cell Li-ion Battery Protection IC

  • RoHS

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

Download Datasheet

Protections / Functions

Functional Description

Temperature Protection Reset Alarm Cell Balance Cascadable Open Wire Detection Wakeup Short-circuit Current Detection Delay Time Shortening

Technical Documents

Typical Application

Typical Application

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
DFN1414-6B R5487L5 R5487L5xx
  • gradeConsumerC
DFN1814-6B R5487L1-L4 R5487L1xx

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

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".

Search for similar products under conditions below.

Category:Lithium-ion Battery Protection ICs

Features Battery Protection
Cell 1
Functions Short-circuit Current Detection,Delay Time Shortening