Vehicle having a DC-DC converter, and a method of controlling the DC-DC converter for a vehicle

A DC-DC converter of a vehicle for converting a first voltage output from a first battery into a second voltage output from a second battery, the DC-DC converter comprising:

• a transformer including a primary coil connected to the first battery and a secondary coil connected to the second battery, and configured to convert the first voltage into the second voltage;
• a first switch connected in series to the transformer;
• a reset capacitor connected in parallel to the primary coil;
• a second switch connected in series to the reset capacitor;
• a voltage sensor configured to measure a value of the first voltage;
• a current sensor configured to measure a value of second current output from the secondary coil;
• and
• a controller configured to turn on/off the first switch and the second switch based on an operating frequency,
• wherein the controller is configured to delay turning-on of the first switch based on the measured value of the first voltage and the measured value of the second current.

A method of controlling a DC-DC converter of a vehicle including a transformer configured to convert a first voltage of a first battery into a second voltage of a second battery, a first switch configured to control a first current input to the transformer, a reset capacitor configured to reset a primary coil of the transformer, and a second switch configured to control reset current of the reset capacitor, the method comprising:

• turning on the second switch to reset the primary coil of the transformer;
• turning off the second switch;
• measuring a value of second current output from a secondary coil of the transformer;
• measuring a value of the first voltage of the first battery;
• deciding a dead time for delaying turning-on of the first switch based on the measured value of the second current and the measured value of the first voltage;
• turning on the first switch after the dead time elapses;
• and
• turning off the first switch.