| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a switching power circuit that implements a higher response speed by employing a single-inductor multiple-output DC/DC conversion circuit using ΔΣ modulation control, and reduces the effect of cross regulation. <P>SOLUTION: When an input voltage is input into a single-inductor dual-output DC/DC conversion circuit 150, output voltages are subjected to ΔΣ modulation control via first and second error amplifiers 151 and 152, first and second ΔΣ modulation circuits 153 and 154, and a drive circuit 155, and the single-inductor dual-output DC/DC conversion circuit 150 produces output voltages. The ΔΣ modulation control is characterized in that a pulse density of the outputs changes in proportion to the input signal. <P>COPYRIGHT: (C)2013,JPO&INPIT |
