The driving circuit includes a variable-output switch-mode power supply； a power amplifier into which an output voltage of the variable-output switch-mode power supply is input, and which outputs a driving voltage to an actuator on the basis of the output voltage； and a comparator that compares a first target voltage based on the driving voltage of the actuator with a second target voltage based on the output voltage of the variable-output switch-mode power supply, in which when an absolute value of the second target voltage is smaller than an absolute value of the first target voltage as a result of the comparison in the comparator, the control circuit performs switching control of the variable-output switch-mode power supply so as to increase the absolute value of the second target voltage to the absolute value of the first target voltage or larger.
