| 摘要 |
<P>PROBLEM TO BE SOLVED: To widen a range of an input voltage for enabling an output voltage to be controlled, and to heighten a switching frequency, in order to control the output voltage. <P>SOLUTION: In a DC-DC converter, the on period of a control signal cntl for controlling an output voltage Vout is made shorter than the on period of a comparison result signal comp_out by masking part of the on period of the comparison result signal comp_out in which the on period varies according to the output voltage Vout, with a timing control signal tm_cntl of which the transition timing varies according to the input voltage Vin. <P>COPYRIGHT: (C)2010,JPO&INPIT |
