Supplying power to a LV onboard electrical subsystem of a vehicle from the HV onboard electrical subsystem thereof

A vehicle comprising:

• an onboard energy system (EBN) comprising:
• a high-voltage (HV) onboard electrical subsystem (HVN);
• a low-voltage (LV) onboard electrical subsystem (NVN);
• and
• at least one electrically isolated DC-DC voltage converter connected between the HV onboard electrical subsystem and the LV onboard electrical subsystem, wherein the at least one electrically isolated DC-DC voltage converter has an adjustable current saturation representing a maximum output current that the at least one electrically isolated DC-DC voltage converter can output to the low-voltage onboard electrical subsystem,
• wherein the vehicle is configured to:
• stipulate an auxiliary voltage that lies between a nominal voltage of the HV onboard electrical subsystem and a predefined minimum input voltage;
• ascertain an associated input power in response to an input voltage measured at an input of the at least one DC-DC voltage converter dropping below a value of the auxiliary voltage;
• compute a power-adapted value of a current saturation for the maximum output current of the at least one DC-DC voltage converter on a basis of a previously ascertained input power, and set the computed power-adapted value of the current saturation for the maximum output current of the at least one electrically isolated DC-DC voltage converter instead of a standard value of the current saturation for the at least one electrically isolated DC-DC voltage converter;
• and
• reset the current saturation for the least one electrically isolated DC-DC voltage converter to the standard value in response to the input voltage again reaching the nominal voltage of the HV onboard electrical subsystem.