Electronic control device, in-vehicle system, and power supply device

Abstract

The present invention reduces conducted noise of an input current in a power supply device having a plurality of channels at low cost. In a power supply circuit () possessed by an autonomous running control ECU, switching circuitsrespectively generate, on the basis of control signals C, power supplies supplied to a plurality of logic circuits. A transition management unitcontrols the switching circuits. A clock generation unitgenerates a plurality of clock signals. The transition management unithas a control signal generation unit and a plurality of delay units. The control signal generation unit generates intermediate control signals from the clock signals generated by the clock generation unit. The delay units delay the intermediate control signals on the basis of command signals and output the delayed intermediate control signals as the control signals C. The clock signals generated by the clock generation unit include at least one clock signal having a different frequency.