Heater control in aerosol generating device

A method of operating a control device of an aerosol generating device, the method comprising:

• in a first execution loop:
• applying a first power output to a heater coil for a first number of steps of the first execution loop;
• disabling the first power output and thereby switching off the heater coil in a second number of steps, following the first number of steps, of the first execution loop;
• measuring a first heater coil voltage of the heater coil in a third number of steps, following the second number of steps, of the first execution loop with a smaller power output than the first power output applied to the heater coil;
• pausing with the heater coil switched off for a fourth number of steps, following the third number of steps, of the first execution loop;
• and
• measuring a first off-load battery voltage of a battery in a fifth number of steps, following the fourth number of steps, of the first execution loop, wherein the first off-load battery voltage corresponds to the battery being in an off-load state in which a heating load is not being applied;
• wherein each step in the first number of steps, the second number of steps, the third number of steps, the fourth number of steps, and the fifth number of steps corresponds to a predetermined time period;
• and
• the method further comprising calculating an updated power output based upon the first heater coil voltage and the first off-load battery voltage.

A non-transitory computer-readable medium storing instructions that, when executed by one or more processors, cause the one or more processors to carry out:

• in a first execution loop:
• applying a first power output to a heater coil for a first number of steps of the first execution loop;
• disabling the first power output and thereby switching off the heater coil in a second number of steps, following the first number of steps, of the first execution loop;
• measuring a first heater coil voltage of the heater coil in a third number of steps, following the second number of steps, of the first execution loop with a smaller power output than the first power output applied to the heater coil;
• pausing with the heater coil switched off for a fourth number of steps, following the third number of steps, of the first execution loop;
• and
• measuring a first off-load battery voltage of a battery in a fifth number of steps, following the fourth number of steps, of the first execution loop, wherein the first off-load battery voltage corresponds to the battery being in an off-load state in which a heating load is not being applied;
• wherein each step in the first number of steps, the second number of steps, the third number of steps, the fourth number of steps, and the fifth number of steps corresponds to a predetermined time period;
• and
• further comprising calculating an updated power output based upon the first heater coil voltage and the first off-load battery voltage.