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
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United States of America Patent
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Apr 25, 2017
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N/A
app pub date -
Mar 2, 2015
filing date -
Mar 3, 2014
priority date (Note) -
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Abstract
A control circuit of a digital control power supply circuit includes: an A/D converter that samples a feedback voltage according to an output voltage of the power supply circuit when a strobe signal is asserted, and converts the sampled feedback voltage into digital feedback data; an error detector that generates error data which indicates a difference between the feedback data and target data; a compensator that generates a duty command value which is adjusted to approximate the error data to zero; a digital pulse width modulator that receives the duty command value and generates a pulse signal having a duty ratio corresponding to the duty command value; and a strobe signal generator that generates the strobe signal and adjusts a sampling timing at which the strobe signal is asserted such that the sampling timing approximates a target position set in a substantial center of a slope of the output voltage.
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