R5435 Series

2-Cell to 3-Cell Li-ion Battery Second Protection IC

R5435 Series are CMOS-based high voltage tolerant over-charge protection ICs for Li-ion/Li-polymer secondary battery. The R5435 can detect overcharge of 2-cell to 3-cell Li-ion/ Li-polymer batteries. The R5435 is consists of 3 voltage detectors, a voltage reference unit, an oscillator, a counter, a delay circuit, a logic circuit.

When the over-charge is detected, after the IC internally fixed delay time, the output of COUT becomes "H". After detecting over-charge, when the cell voltage becomes lower than the over-charge released voltage, the over-charge state is released.

If all the cells voltages become equal or less than the shutdown detector threshold, all the circuits are halted and shut down, as a result, the consumption current of IC itself (Shutdown current) is extremely reduced. By connect short 2 cells other than monitored cell, over-charge and released delay time can be shortened. The output type is CMOS.