Patent ID: 8737101

Claim:
A switching driving circuit controlling a switching operation of a high-side switch connected between a first power voltage terminal and an output terminal, and a low-side switch connected between the output terminal and a second power voltage terminal, comprising: a dead time controller generating a high-side switching driver controlling signal and a low-side switching driver controlling signal controlling a switching operation of the high-side switch and the low-side switch according to a dead time controlling signal; and a phase detector detecting a phase of a resonance current flowing into the second power voltage terminal to generate a phase information signal, wherein one of the high-side switch driver controlling signal and a signal corresponding thereto, and the phase information signal are compared, and if a turn-on time of the high-side switch is later than a phase change of the resonance current, the dead time is controlled for the turn-on time of the high-side switch to advance the phase change of the resonance current.