Abstract: A switched-mode power supply is provided which has at least one power circuit for supplying a first electrical consumer, and at least one auxiliary power supply unit for generating a first transformer-coupled output voltage for a switching controller for controlling or regulating the power circuit, and at least one further transformer-coupled output voltage for at least one further electrical consumer in a first operating mode. The first and the at least one further transformer-coupled output voltage of the at least one auxiliary power supply unit are variable in comparison with the first operating mode in a further operating mode of the switched-mode power supply.

Abstract: A switch-mode power supply includes a control element in a primary circuit for controlling a transformer for transmitting electric energy from the primary circuit to a secondary circuit, a first regulating element in the secondary circuit for regulating an electric output variable of the secondary circuit, and a second regulating element in the primary circuit for regulating an electric controlled variable of the control element as a function of a temperature of the primary circuit, the second regulating element being thermally coupled to an element of the primary circuit whose temperature is to be ascertained.

Abstract: A charging device for electrical charging of a battery pack of a hand-held power tool including a charging interface for establishing an electrical and/or mechanical coupling of the charging device to an interface unit of the battery pack, the charging interface having at least two counter-contact elements for electrical and/or mechanical contacting of corresponding contact elements of the battery pack. The counter-contact elements include a third counter-contact element designed to forward information transmitted by the third contact element with respect to a first set of predefined battery system parameters of the battery pack to the charging control unit, and a fourth counter-contact element designed to forward information transmitted by the fourth contact element with respect to an instantaneous operating parameter of the battery pack to the charging control unit.

Abstract: A switched-mode power supply is provided which has at least one power circuit for supplying a first electrical consumer, and at least one auxiliary power supply unit for generating a first transformer-coupled output voltage for a switching controller for controlling or regulating the power circuit, and at least one further transformer-coupled output voltage for at least one further electrical consumer in a first operating mode. The first and the at least one further transformer-coupled output voltage of the at least one auxiliary power supply unit are variable in comparison with the first operating mode in a further operating mode of the switched-mode power supply.