Patent ID: 8710818

Claim:
A power converter comprising: a power converting unit configured to generate an inductor peak current and a DC output voltage responsive to the inductor peak current, based on a pull-up driving signal, a pull-down driving signal and a DC input voltage; a zero-current detecting circuit configured to compare a voltage signal of a sensing node within the power converting unit and a ground voltage to generate a zero-current detecting signal in response to a first detection voltage signal; and a driving circuit configured to compensate for the inductor peak current, and perform in a pulse-frequency-modulation (PFM) mode and a pulse-width-modulation (PWM) mode to generate the pull-up driving signal and the pull-down driving signal based on the DC output voltage, the zero-current detecting signal and the compensated inductor peak current, the driving circuit comprising a comparator configured to compare the DC output voltage with a reference voltage to generate the first detection voltage signal, a current sensor configured to compensate for the inductor peak current and detect the compensated inductor peak current to generate a current-sensing output signal, and a switch-driving-signal generator configured to perform in the PFM mode or the PWM mode based on the first detection voltage signal, the zero-current detecting signal and the current-sensing output signal, to generate the pull-up driving signal and the pull-down driving signal.