R5494 Series

1-Cell Li-Ion Battery Protection IC

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Description

The R5494 is a high voltage tolerance CMOS-based protection IC for Over-charge / discharge and Overcurrent of a rechargeable one-cell Lithium-ion (Li+) / Lithium polymer battery. The R5494 can detect Over-charge / discharge of the Li+ one-cell, Excess load current, and Charge-current. And, the R5494 has a short circuit detector for preventing large external short circuit current. The R5494 consists of four voltage detectors, a reference unit, a delay circuit, a short circuit detector, an oscillator, a counter, and logic circuits.

Spec

Operating Input Voltage	1.5 V to 5.0 V (Maximum Rating: 12 V)
Number of Cells	1
Supply Current	Typ. 3.0 µA
Standby Current	Max. 0.5 µA
Overcharge Detection Voltage	4.1 V to 4.5 V (0.005 V step)
Overcharge Detection Voltage Accuracy	±20 mV
Overcharge Detection Delay Time	1.0 s
Overdischarge Detection Voltage	2.1 V to 3.0 V (0.050 V step)
Overdischarge Detection Voltage Accuracy	±35 mV
Overdischarge Detection Delay Time	128 ms
Discharge Overcurrent Detection Voltage	0.030 V to 0.048 V (0.001 V step)
Discharge Overcurrent Detection Voltage Accuracy	±10% or ±4 mV
Discharge Overcurrent Detection Delay Time	8 ms
Charge Overcurrent Detection Voltage	-0.030 V to -0.020 V (0.001 V step)
Charge Overcurrent Detection Voltage Accuracy	±15%
Charge Overcurrent Detection Delay Time	9 ms
Short Detection Voltage	VDET3 = 0.030 V to 0.047 V : VDET3 x 3 VDET3 = 0.048 V : VDET3 x 3 -1mV
Short Detection Delay Time	200 µs (tVDET3 = 8 ms)
Conditions for Overcharge Restoration	Voltage Release
Conditions for Overdischarge Restoration	Voltage Release
Package	DFN1814-6C
0 V Charge	Optional

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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
R5494Lxxxxx-TR		DFN1814-6C	R5494L	R5494L

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