Driving voltage adjusting circuit and power supplying system

A power supplying system, comprising:

• a voltage converter, driven by a driving voltage, and comprising:
• a switching element set, comprising two switching elements;
• and
• a driving voltage adjusting circuit, comprising:
• a detecting unit, disposed adjacent to one of the two switching elements, and configured to detect a temperature of the one of the two switching elements;
• a voltage dividing unit, electrically connected to the detecting unit and the voltage converter, and receiving the driving voltage, the voltage dividing unit dividing the driving voltage according to the temperature of the one of the two switching elements to generate a dividing voltage;
• and
• an adjusting unit, electrically connected to the voltage dividing unit, and receiving an input voltage and the dividing voltage, the adjusting unit adjusting the input voltage according to the dividing voltage to output the driving voltage, and the driving voltage being transmitted to the voltage converter;
• wherein the temperature is positively correlated with the driving voltage.