| 摘要 |
PROBLEM TO BE SOLVED: To provide a switching power circuit that is a single-inductor multiple-output DC/DC conversion circuit and that can reduce the influence from a cross regulation.SOLUTION: A switching power circuit of the present invention controls each output voltage of a single-inductor multiple-output DC/DC conversion circuit, the switching power circuit comprising: a single-inductor multiple-output DC/DC conversion circuit for converting an input voltage to a plurality of output voltages, the conversion circuit having a plurality of channels to obtain one voltage for each channel; and a control circuit that selects a channel having a greatest error between an output voltage and a prescribed voltage at each channel of the single-inductor multiple-output DC/DC conversion circuit for each switching cycle during the switching to obtain the one output voltage, the control circuit performing the switching to obtain the output voltage without changing the total time of the control cycle for each channel but changing the control cycle of the output voltage. |
