Inverter driving device and method

A driving method of an inverter driver comprising an inverter circuit including a first switch and a second switch, for inverting DC components into AC components in response to a switching operation by the first and second switches to drive a load;

• a control signal supply for outputting a first voltage corresponding to a voltage caused by sensing the current flowing to the load, and outputting a second voltage as well as a third voltage generated by multiplying the first voltage by a predetermined gain;
• and a frequency controller including a capacitor and an oscillator having a first end coupled to the capacitor, the method comprising:
• (a) controlling a first current charged in/discharged from the capacitor through the first end of the oscillator in response to the first voltage to control the frequency of the oscillator;
• and
• (b) comparing the third voltage with a fourth voltage charged in the capacitor, and controlling the duty of the first and second switches in response to comparison results.