| 摘要 |
<p>PROBLEM TO BE SOLVED: To maintain an output voltage to be constant regardless of the magnitude of a load current and to reduce power consumption.SOLUTION: A DC-DC converter control circuit includes: an inductor interposed between a first node set to either of a first DC voltage or a second DC voltage and a second node outputting an output voltage having a predetermined DC voltage level; an error signal generator generating an error signal according to a voltage difference between a voltage correlated to the output voltage and a reference voltage; a ripple extractor extracting and outputting a ripple component included in the voltage at the first node; a single-phase signal generator generating a single-phase signal on the basis of the error signal and the output signal from the ripple extractor; and a switch driving section driving and controlling a switch circuit for setting the first node to the first DC voltage or the second DC voltage on the basis of the single-phase signal.</p> |
