Boost control apparatus

A boost control apparatus that can realize one-side element control for driving only one of a first switching element and a second switching element, each of which is connected to a reactor in series, said boost control apparatus comprising;

• a current value change amount detecting device configured to detect a change amount of output current that flows through the reactor in a first predetermined period during the one-side element control;
• a determining device configured to determine that the output current is near zero if the change amount is less than a predetermined threshold value;
• and
• a controlling device configured (i) to perform first duty control by a first control parameter if it is not determined that the output current is near zero, and (ii) to perform second duty control by a second control parameter, which is different from the first control parameter, if it is determined that the output current is near zero, wherein
• the first control parameter and the second control parameter include feed-forward terms that are different from each other, and
• a duty ratio corresponding to the output current in the second duty control is set to be greater than a duty ratio in the first duty control due to the different feed-forward terms.