Control circuit and control method of digital control power supply circuit, and digital control power supply circuit, electronic device and base station using the same

摘要

A control circuit of digital control power supply circuit includes: first filter generating detection voltage having voltage level based on time average of output voltage of the digital control power supply circuit; A/D converter sampling feedback voltage having voltage level based on the output voltage at peak or bottom of the output voltage and converting the sampled feedback voltage into digital feedback data, and converting the detection voltage into digital detection data; error detector generating error data indicating difference between the feedback data and target data indicating target value of the feedback voltage; compensator generating duty command value adjusted to make the error data approximate zero; digital pulse modulator receiving the duty command value and generating pulse signal having duty ratio corresponding to the duty command value; and correction unit correcting the target data based on difference between the detection data and the feedback data.

主权项

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.