Scalable power supply system

A scalable power supply system comprising:

• a plurality of power conversion circuits that each include an inductor and a power semiconductor circuit, the power semiconductor circuit including a switching device and a driving unit, the switching device being configured to control current flowing through the inductor, the driving unit driving the switching device;
• a power management control circuit configured to generate a first digital switching driving signal that is to be provided to a first power semiconductor circuit of the plurality of power semiconductor circuits;
• and
• an extended-control circuit that is electrically connected between the power management control circuit and a second power semiconductor circuit of the plurality of power semiconductor circuits, and that is configured to generate a second switching driving signal from the first digital switching driving signal to provide the second switching driving signal to the second power semiconductor circuit, the second power semiconductor circuit being different from the first power semiconductor circuit,
• wherein
• the extended-control circuit has a voltage-time conversion circuit that is configured to set a predetermined signal delay time with respect to the first digital switching driving signal and that is configured to generate the second switching driving signal, the voltage-time conversion circuit has a threshold-signal conversion circuit that is configured to use a time constant of a CR circuit and a threshold voltage to determine the signal delay time, the CR circuit including a resistance and a capacitor, and
• the extended-control circuit is configured to
• use the time constant of the CR circuit of the threshold-signal conversion circuit to set a phase of a second analog switching driving signal on which the second switching driving signal is based,
• use the threshold voltage of the threshold-signal conversion circuit and the second analog switching signal to set an on-time width of the second switching driving signal, the second analog switching signal having a phase which has been set, the on-time width being set to be equal to an on-time width of the first digital switching driving signal, and
• determine a count of the plurality of power conversion circuits in accordance with a total number of signals which is obtained by adding a first signal count of the first digital switching driving signal and a second signal count of the second switching driving signal together.