Electrical power supply device and method of operating same

A method, comprising:

• providing a device controller and a DC-DC power convertor in communication with the device controller, said device controller having one or more processors and memory:
• receiving an input voltage;
• receiving a signal indicative of whether the input voltage is equal to, greater than, or less than a threshold voltage;
• producing a first output voltage via the DC-DC power convertor in accordance with the device controller determining that the input voltage is equal to the threshold voltage;
• producing the first output voltage via the DC-DC power convertor in accordance with the device controller determining that the input voltage is greater than the threshold voltage;
• and
• producing a second output voltage via the DC-DC power convertor which is less than the first output voltage in accordance with the device controller determining that the input voltage is less than the threshold voltage, wherein the first and second output voltage are each less than the input voltage.