R5435x SERIES Li-ION/POLYMER 2/3-CELL PROTECTOR Second protection IC NO.EA-282-120409 OUTLINES R5435x Series are CMOS-based high voltage tolerant over-charge protection ICs for Li-ion/Li-polymer secondary battery. The R5435x can detect overcharge of 2-cell to 3-cell Li-ion/ Li-polymer batteries. The R5435x 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. 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. FEATURES Manufactured with High Voltage Tolerant Process ...... Absolute Maximum Rating 30V Low supply current........................................... Cell voltage 3.9V, for 3-cell Typ. 3.0A High accuracy detector threshold .................... Over-charge detector (Ta=25C) 20mV (Ta=0 to 60C) 25mV Variety of detector threshold Over-charge detector threshold 4.1V-4.55V step of 0.005V (VDET1n) (n=1, 2, 3) Over-charge released voltage VDET1n-0V to VDET1n-0.4V step of 0.05V (VREL1n) (n=1, 2, 3) MIN.3.95V Setting of Output delay time............................. Over-charge detector Output Delay options 2, 4, 6s(Built-in delay) Shutdown Function ............................................When all the cell voltages become equal or less than shutdown detector threshold, the IC will be into shutdown mode and the consumption current of IC itself becomes extremely small. Even if one of the cells becomes equal or more than shutdown released voltage, the shutdown mode is released. Shutdown detector threshold ............................Typ. 3.5V0.4V Shutdown Release Hysteresis ..........................none Shutdown current..............................................Max. 0.1A 2/3 cell protection enabler.................................By external wiring, 2 or 3-cell protection can be selected. Over-charge released condition........................Released by voltage type COUT output ........................................................COUT: 4.7V regulator power supply CMOS output. Active Delay Time Shortening Function.......................As a result of specified setting, the delay times are shortened, over-charge detector time is shortened from 2sec to 1/50, 4sec and 6sec to 1/80. ex. VC2=VC3=VSS, the delay time for cell 1 is shortened. VC1=VC2, VC3=VSS, the delay time for cell 2 is shortened. VC1=VC2=VC3, the delay time for cell 3 is shortened. Small package.................................................. TSOT-23-6, DFN(PLP)1616-6B 1 R5435x BLOCK DIAGRAM VDD VC1 VD1-1 VR Logic Shutdown Regulator Circuit VR VC2 VD1-2 Logic Circuit Shutdown DS VC3 Oscillator VR Circuit VD1-3 Shutdown Counter Cout VSS 2