DC/DC converter and driving apparatus having the same

A driving apparatus, comprising:

• a power factor correction part switching a rectified power to correct a power factor;
• a DC/DC converter part switching the power in which the power factor is corrected from the power factor correction part, and converting the switched power into a predetermined DC power to thereby supply the converted DC power to an organic light emitting diode (OLED);
• and
• a control part controlling switching of the DC/DC converter part in accordance with driving power supplied to the OLED and a driving signal controlling brightness of the OLED to thereby control a voltage level of the DC power,
• wherein the control part includes:
• a comparison part comparing a predetermined reference signal with the DC power of the DC/DC converter part and a signal level of the driving signal, and
• a switching control part controlling switching of the DC/DC converter part in accordance with a comparison result of the comparison part.