Abstract: A dynamic output power management unit for a heating circuit (100) of an electronic smoking device is disclosed, the heating circuit (100) having a heating element (10) connected to a power source (20) via a first switching element (30), the unit having at least one voltage detection device to detect voltage values at various points of the heating circuit (100); and a controller (2) configured to deriving a resistance of the heating element (10), estimating a discharge time or a power consumption value of the power source (20) such that an energy converted in a period of time is substantially identical to a predetermined energy conversion value for a same period of time.

Abstract: An electronic smoking device comprises a housing accommodating a battery (10) as an electric power source powering an electrically heatable atomizer comprising an electric heater (22) and adapted to atomize a liquid supplied from a reservoir to provide an aerosol exiting from the atomizer. The heater (22) of the atomizer is controlled by means of control electronics (14). A puff detector (18) indicates an aerosol inhaling puff to the control electronics (14). The control electronics (14) operates, for a puff, the heater (22) of the atomizer with a pre-determined level of electric power. Preferably, the electronic smoking device comprises a voltage sensor (34) measuring the battery voltage, wherein the control electronics (14) distributes the pre-determined level of electric power, for a puff, by pulse width modulation, based on the battery voltage measured by the voltage sensor (34).

Abstract: Provided herein are methods and devices, systems for delivering one or more compounds to a subject. Also described herein are methods and devices for transitioning a smoker to an electronic nicotine delivery device and for smoking or nicotine cessation.