Patent ID: 7715217

Claim:
A voltage conversion device comprising: a reactor; a first switching device operative in response to a first activation signal to couple one end of said reactor with a first power supply node; a second switching device operative in response to a second activation signal to couple said one end of said reactor with a ground node; a first dead time generation unit operative in response to a reference signal for a duty ratio, to output said first and second activation signals provided with an inactive period corresponding to a dead time preventing both said first and second switching devices from conducting; and a control unit correcting a tentative duty ratio calculated as based on a voltage control value, in accordance with a value of a current flowing through said reactor, to output said reference signal, wherein said control unit exerts proportional-plus-integral-plus-derivative control based on a deviation between said voltage control value and an output voltage value and corrects an integral term in accordance with said value of said current of said reactor to correct said tentative duty ratio.