초록 ▼

A DC-DC converter generally includes a supply circuit, a charge circuit, and a control unit connected to the charge circuit. The charge circuit receives the input current and supplying a charge current to the battery. The control unit controls the charge current according to the results of compariso

A DC-DC converter generally includes a supply circuit, a charge circuit, and a control unit connected to the charge circuit. The charge circuit receives the input current and supplying a charge current to the battery. The control unit controls the charge current according to the results of comparisons between various currents and voltages and corresponding threshold levels. The control unit, which may be constructed on a single-chip semiconductor substrate, includes a differential charge controller, a charge current controller, a charge voltage controller, and a dynamic charge controller. These elements respectively compare the input current, the charge current, the charge voltage and an input voltage from the external DC power supply with a threshold values and control the charge current and charge voltage according to a result of the comparisons.

대표청구항 ▼

1. A DC-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 supplyi

1. A DC-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.