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R5640 Series

2-Cell to 5-Cell Li-ion Battery Second Protection IC

  • PLP
  • RoHS

The R5640 is an overcharge protection IC for 2- to 5- serial cell Li-ion / Li-polymer rechargeable battery pack, with built-in high-accuracy voltage detection circuits and delay circuits. Controlling the supply voltage to the CTLC pin can control the COUT pin output. The shutdown detection can reduce the supply current to the minimum.

  • Reducing the supply current to 0.2 µA or less after shutdown detection can achieve the longer battery life.
  • Cascading the R5640 of 2 or more is adaptable to the battery pack of 6 or more cells and results in a reduction of external parts.
  • Be adaptable to 30 V input voltage by using high-voltage process.

Specs & Datasheets

Operating Input Voltage 4.0 V to 25 V or VC2 +5 V
Number of Cells 2,3,4,5
Supply Current Typ. 2.5 µA
Shutdown Detection Voltage Typ. 2.1 V±0.3 V, 2.5 V±0.3 V , 3.7 V±0.3 V
Shutdown Current Max. 0.2 µA
Overcharge Detection Voltage 2.90 V to 4.60 V (0.005 V step)
Overcharge Detection Voltage Accuracy ±0.016 V (Ta = 25°C)
±0.025 V (0°C ≤ Ta ≤ 60°C)
Overcharge Detection Delay Time 2 s, 4 s, 6 s, 10 s, 16 s
Overcharge Restoration Voltage VDET1 to VDET1 -0.4 V (VDET1 ≥ 3.0 V, 50 mV step)
VDET1 to VDET1 -0.35 V (VDET1 < 3.0 V, 50 mV step)
Min. 4.05 V (Shutdown detection voltage = 3.7 V)
Conditions for Overcharge Restoration Voltage Release
Package MSOP-8
CTLC Detection Delay Time 2 ms
Output Form Internal Regulator: Pch, Open Drain

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: 10-cell Protection Circuit at Cascading

Typical Application: 10-cell Protection Circuit at Cascading

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
  • plpP
MSOP-8 R5640G R5640G-FE

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Please contact us or our distributors for unpublished reliability information.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 Second Protection
Cell 2,3,4,5
Functions Cascadable,Delay Time Shortening
PLP Applicable