R5641 Series

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

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Description
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.

Spec

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

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

Functional Description

Quality &
Packages

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

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.

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