Patent ID: 8779727

Claim:
A charge control device comprising: a charge control circuit to control a charge of a secondary battery by controlling an output stage connected between a power supply and the secondary battery; wherein the charge control circuit comprises: a first error amplifier to generate a first error voltage in response to a difference between a predetermined first reference voltage and a first feedback voltage, wherein a value of the first feedback voltage is determined in accordance with a primary current supplied from the power supply to the output stage; a third error amplifier to generate a third error voltage based on a difference between a third feedback voltage and a predetermined third reference voltage, wherein a value of the third feedback voltage is determined in accordance with a charge voltage of the secondary battery; a second error amplifier to generate a second error voltage in response to a difference between (i) the lowest of a predetermined second reference voltage, the first error voltage and the third error voltage, and (ii) a second feedback voltage, wherein a value of the second feedback voltage is determined in accordance with a charge current supplied from the output stage to the secondary battery; and a control signal generator to generate the control signal of the output stage in response to the second error voltage.