Power supply unit for aerosol generation device, and aerosol generation device

A power supply unit for an aerosol generation device, the power supply unit comprising:

• a power supply;
• a first connector electrically connectable to an atomizer capable of atomizing an aerosol source and electrically connected to the power supply;
• a second connector connectable to a heater capable of heating a flavor source that adds a flavor to an aerosol generated from the aerosol source, and electrically connected to the power supply;
• and
• a processing device configured to acquire a temperature of the flavor source or the heater,
• wherein the processing device is configured to
• start second discharge, which is discharge from the power supply to the heater to make the temperature of the flavor source or the heater converge to a target temperature, before starting first discharge, which is discharge from the power supply to the atomizer,
• acquire an elapsed time between a start time point of current second discharge and an end time point of a later one of previous first discharge and previous second discharge, and
• increase power in the first discharge more and/or decrease the target temperature more as the elapsed time becomes longer.