An electronic lighting system with a driver includes transformers that are dedicated to particular lamp receptacles that include interloper diode and resistor sets that fine tune the functioning of the driver. A buck converter and power factor correction, and a zeta scan are included. A comparator circuitry receives an external control signal and compares it to feedback from the output side of the circuitry, and thereby controls a Pulse Width Modulation (PWM) circuitry, which cooperates with feedback-based MOSFETs and a MOSFET gate driver circuit. This aids in dimming capabilities, recognizes and corrects for outages and recognizes and corrects for changes in the different size lamps that a user may install.

A power converter including: a first branch and a second branch of at least two series-connected switches each, coupled in parallel between a first terminal and a second terminal and having the junction points of their switches coupled to two terminals of application of a first voltage; a third branch and a fourth branch of at least two series-connected switches each, coupled in parallel between a third terminal and a fourth terminal, and having the junction points of their switches coupled to two terminals for supplying a second voltage; and at least one piezoelectric element coupling the first terminal to the third terminal.

A power converter including at least one piezoelectric element in a branch of a bridge of switches, the switches being controlled to alternate phases at substantially constant voltage and at substantially constant charge between the terminals of the piezoelectric element.

A power converter including: a first branch and a second branch of at least two series-connected switches each, coupled in parallel between a first terminal and a second terminal and having the junction points of their switches coupled to two terminals of application of a first voltage; a third branch and a fourth branch of at least two series-connected switches each, coupled in parallel between a third terminal and a fourth terminal, and having the junction points of their switches coupled to two terminals for supplying a second voltage; and at least one piezoelectric element coupling the first terminal to the third terminal.

A device for controlling a plurality of electrical consumers to which a constant control current is applied at control nodes. A transformer to which a regulated and/or constant predetermined frequency current is applied at the input end has at least one first and a second winding at the output end which have a common tap, first and second circuit branches forming first and second control nodes for first and second electrical consumers are associated with the first and second windings respectively. The first and second circuit branches each have a magnetically interacting pair of reactors which are wound in opposite relative directions. The first and second reactors of the pair are connected to the first and second control nodes, respectively, via a rectifier. The reactors that are connected to one of the control nodes are oppositely wound. Reactors pairs are magnetically coupled, in particular having a common reactor core.