Skip to main content Skip to first level navigation
Skip to main content First level navigation Menu
Contact Us About Us ricoh.com
Breadcrumbs
Facebook (Open link in new window) YouTube (Open link in new window) LinkedIn (Open link in new window)
Main content
Main content

R5641 Series

2-Cell to 4-Cell Li-ion Battery Second Protection IC

  • PLP
  • RoHS

The R5641 is an overcharge protection IC for 2- to 4-series 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.
  • Temperature protection enabled with an external PTC thermistor.
  • Be adaptable to 30 V input voltage by using high-voltage process.

Specs & Datasheets

   
Operating Input Voltage 4.0 V to 20 V (Maximum Rating: 30 V)
Number of Cells 2,3,4
Supply Current Typ. 2.8 µA
Shutdown Detection Voltage Typ. 2.5 V ± 0.3 V, 3.7 V ± 0.3 V
Shutdown Current Max. 0.2 µA
Overcharge Detection Voltage 4.10 V to 4.60 V (0.005 V Steps)
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
Overcharge Restoration Voltage VDET1 to VDET1 -0.4 V (0.05 V Steps)
Min. 4.05 V (Shutdown detection voltage = 3.7 V)
Package DFN2020-8C
CTLC Detection Delay Time 2 ms
Output Form CMOS Output

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: 4-cell Protection Circuit

Typical Application: 4-cell Protection Circuit

Quality & Packages

Product Name Compatibility Package Marking Reliability
R5641Lxxxxx-TR
  • gradeConsumerC
  • plpP
DFN2020-8C R5641L R5641L

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Please contact us or our distributors for unpublished reliability information.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
Functions Temperature Protection,Delay Time Shortening
PLP Applicable