R5432V408BA Datasheet | RICOH

R5432V SERIES 3 to 5 Cells Li-ion Battery Protector IC NO.EA-263-1600711 OUTLINE The R5432V is a high voltage CMOS-based protection IC for overcharge /discharge of rechargeable three-cell / four-cell / fivecell Lithium-ion / Lithium- polymer battery, further include a short circuit and the protection circuits against the excess discharge current and excess charge current. Each of these ICs is posed of eighteen voltage detectors (fourteen for 3cell protection type, sixteen for 4cell protection type), a reference circuit, a delay circuit, a short detector circuit, an oscillator, a counter and a logic circuit. The output of COUT is P-channel open-drain type, and DOUT is CMOS type. If the overcharge voltage or overcharge current is detected by the R5432V, after the preset output delay time, the output of COUT bees Hi-Z. While the overdischarge voltage or current is detected, after the preset output delay time, the output of DOUT bees ”L”. After detecting overcharge voltage, when the cell voltage returns lower than the overcharge released voltage, then overcharge is released and the output of COUT bees “H”. After detecting overcharge current, by disconnecting a charger and connecting a load, then overcharge current is released and the output of COUT bees “H”. After detecting overdischarge voltage, when the cell voltage bees the released voltage from overdischarge or more, then overdischarge is released and the output of DOUT bees “H”. After detecting overdischarge current and short circuit, by disconnecting the load, the function of the output of DRAIN pin, the external NMOSFET turns on, and VMP pin voltage is pulled down by the resistance connected to GND and released overdischarge current or short and the output of DOUT bees “H”. By forcing a certain voltage to SEL1 and SEL2 pins, the testing time of protection circuits can be short. Specifically, overcharge, discharge, over current delay time can be shortening into approximately 1/80. The...