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The R5480 is a high voltage tolerance CMOS-based protection IC for over-charge/discharge and over-current of rechargeable one-cell Lithium-ion (Li+)/Lithium polymer battery. The R5480 can detect over-charge/discharge of Li+ one-cell and excess load current and charge current, further, include a short circuit protector for preventing large external short circuit current. The R5480 consists of four voltage detectors, a reference unit, a delay circuit, a short circuit detector, an oscillator, a counter, and a logic circuit.


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