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R5641 Series
2-Cell to 4-Cell Li-ion Battery Second Protection IC

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Product Specifications

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.

FEATURES

Operating Input Voltage Range 4.0 V to 20 V
Supply Current Typ. 2.8 µA
Shutdown Current Max. 0.2 µA
Overcharge (VDET1) Detector Threshold Range 4.10 V to 4.60 V (0.005 V Steps)
Detector Threshold Accuracy ± 0.016 V (Ta = 25°C)
± 0.025 V (0°C ≤ Ta ≤ 60°C)
Detection Delay Time 2 / 4 / 6 sec
Delay shortening function can reduce the delay time to approx.1/80.
Release Voltage VDET1 to VDET1 -0.4 V (0.05 V Steps)
Min. 4.05 V when shutdown detection voltage is 3.7 V.
Release Voltage Condition Voltage Release Type
Shutdown Detection Voltage Typ. 2.5V ± 0.3V / 3.7V ± 0.3V
CTLC Pin Detection Delay Time 2 msec
Functions Selectable Timer Reset Delay Function
Temperature Protection with External PTC Thermistor
Output Type CMOS Output
Package DFN2020-8C

APPLICATION INFORMATION

4-cell Protection Circuit

PIN DESCRIPTION

DFN2020-8C

DFN2020-8C2.0 mm × 2.0 mm
1 VDD
2 VC1
3 VC2
4 VC3
5 VC4
6 VSS
7 CTLC
8 COUT

*) The tab is not connected with the IC chip, so the tab should be left open.


R5641 Series for Consumer

APPLICATIONS

  • Li-Ion or Li-Polymer Battery Protection

SELECTION GUIDE

Overcharge detection / release voltages and delay time are user-selectable options.

Product Name   Package Quantity per Reel
R5641Lxxx$#-TR 民生 DFN2020-8C 3,000
  • xxx … Specify the combination of the overcharge detection voltage (VDET1n), the overcharge release voltage (VREL1n), and the shutdown detection voltage (VSHTn).
    VDET1n*1 : 4.1 V to 4.6 V in 5 mV step
    VREL1n : VDET1n –0V to VDET1n –0.4V in 50 mV step*2
    VSHTn*1 : 2.5V / 3.7 V
  • $ … Specify the overcharge detection delay time (tVDET1).
    A : 2 s
    B : 4 s
    C : 6 s
  • # … Specify the CTLC function and the timer reset delay function.
Code CTLC Function at Shutdown Timer Reset Delay Function
C Disable Disable
D Enable Disable
E Disable Enable
F Enable Enable

*1: VDET1n, VREL1n, VSHTn: n = 1, 2, 3, 4
*2: Min. 4.05 V when shutdown detection voltage (VSHTn) is 3.7 V.

DOCUMENT/CONTACT

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Package*1 Reliability*2
DFN2020-8C R5641L

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

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