Patent ID: 6337563
Filing Date: 2002-01-08
Classification: H02J,H02M

Abstract:
A DCâ€”DC converter for generating a circuit current and charging a battery, comprising:a supply circuit for supplying the circuit current to internal circuits in accordance with an input current supplied from an external DC power supply; a charge circuit for receiving the input current and supplying a charge current to the battery; and a control unit, connected to the charge circuit, for controlling the charge current, the control unit including, a differential charge controller for comparing the input current with a first threshold value and controlling the charge current according to a result of that comparison, a charge current controller for comparing the charge current with a second threshold value and controlling the charge current according to a result of that comparison, a charge voltage controller for comparing a charge voltage of the battery with a third threshold value and controlling the charge current according to a result of that comparison, and a dynamic charge controller for comparing an input voltage from the external DC power supply with a fourth threshold value and controlling the charge current according to a result of that comparison.