R5464 Series

High Accuracy 2-Cell Li-ion Battery Protection IC with Alarm Function

The R5464 is a CMOS-based over-charge/ over-discharge protector for 2-cell Li-Ion batteries that can produce a high-accuracy alarm-signal. The R5464 has an alarm signal output, a temperature detection, an over-charge voltage detection, an over-discharge voltage/ discharge overcurrent detection and a charge overcurrent detection.

The R5464 is composed of eight voltage detectors, a temperature detector, a reference unit, a delay circuit, a short circuit protector, an oscillator, a counter, and a logic circuit. When the over-charge voltage or over-charge current is detected, the battery voltage crosses the each detector threshold, the output of COUT pin switches to “L” level after internal fixed delay time. The output of DOUT pin, the output of the over-discharge detector and the discharge overcurrent detector, switches to “L” level after internally fixed delay time, when discharged voltage crosses the detector threshold. The output type of COUT and DOUT is CMOS. The output type of AOUT is Pch open drain.