Patent ID: 8604766
Filing Date: 2013-12-10
Classification: G05F,H02M

Abstract:
1. A control circuit of a DC-DC converter, the DC-DC converter generating a square wave voltage by periodically switching an input voltage based on a duty ratio depending on a pulse-width modulated signal, and converting this square wave voltage into a direct-current output voltage by a lowpass filter, the control circuit comprising: a voltage difference signal generator configured to generate a digital voltage difference signal depending on a voltage difference between the output voltage and a reference voltage; a PID controller configured to generate a digital PID signal for determining the duty ratio of the pulse-width modulated signal, based on the digital voltage difference signal; a phase controller configured to generate a digital phase control signal for determining a phase of the pulse-width modulated signal, based on the digital voltage difference signal; and a PWM generator configured to generate the pulse-width modulated signal, based on the digital PID signal and the digital phase control signal.