POWER SUPPLY UNIT OF AEROSOL GENERATOR AND CONTROL METHOD THEREOF

A power supply unit for an aerosol generating device includes: a power supply; a processor configured to perform control to supply heating power from the power supply to a heating element for heating an aerosol source and/or a flavor source; a protection circuit configured to limit supply of the heating power to the heating element; and a monitoring circuit including a charge circuit that is capable of storing power from the power supply when the heating power is supplied from the power supply to the heating element, the monitoring circuit being configured to output a signal for operating the protection circuit based on a voltage of the charge circuit, in which the processor is configured to perform discharge 10 control to discharge the voltage of the charge circuit at a timing based on a supply cycle of the heating power to the heating element.