×

DC-DC converter and semicondutor integrated circuit device for DC-DC converter

  • US 6,337,563 B2
  • Filed: 01/26/2001
  • Issued: 01/08/2002
  • Est. Priority Date: 06/08/2000
  • Status: Expired due to Term
First Claim
Patent Images

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.

View all claims
  • 9 Assignments
Timeline View
Assignment View
    ×
    ×