Patent ID: 9455630
Filing Date: 2016-09-27
CPC Classification: H02M,Y02B

Claim Text:
1. A control circuit of a digital control power supply circuit, comprising: a first filter configured to generate a detection voltage having a voltage level based on a time average of an output voltage of the digital control power supply circuit; an A/D converter configured to (i) sample a feedback voltage having a voltage level based on the output voltage of the digital control power supply circuit at a peak or a bottom of the output voltage and convert a sampled feedback voltage into digital feedback data, and (ii) convert the detection voltage into digital detection data; an error detector configured to generate error data indicating a difference between the digital feedback data and target data indicating a target value of the feedback voltage; a compensator configured to generate a duty command value adjusted to make the error data approximate zero; a digital pulse modulator configured to receive the duty command value and generate a pulse signal having a duty ratio corresponding to the duty command value; and a correction unit configured to correct the target data based on a difference between the digital detection data and the digital feedback data.