Patent ID: 7355869

Claim:
A voltage conversion device converting a DC voltage from a DC power supply into an output voltage in such a manner that said output voltage is equal to a first target voltage, comprising: a voltage converter changing a voltage level of said DC voltage to output said output voltage; detection means detecting said output voltage output from said voltage converter; and control means conducting feedback control of said voltage converter in the manner that said output voltage is equal to said first target voltage, said feedback control conducted, in a case where a first deviation between said first target voltage and said detected output voltage is larger than a predetermined value, by changing a second target voltage of said voltage converter in such a manner that a second deviation between said second target voltage and said output voltage decreases, wherein said control means controls said voltage converter, in a case where said detected output voltage decreases below said first target voltage, so that said output voltage is equal to said first target voltage by conducting first feedback control and second feedback control, said first feedback control refers to feedback control of said voltage converter executed by changing said second target voltage in such a manner that said second deviation is at most said predetermined value, and said second feedback control refers to feedback control of said voltage converter executed, in a case where said detected output voltage having been decreasing starts to increase, by changing said second target voltage in such a manner that the rate of change of said second target voltage is at most a standard value.