Abstract: A solar energy powered lamp driver (100; 200) capable of driving a gas discharge lamp (L) comprises:—a half-bridge inverter (130), comprising: a first branch of two controllable switches (131, 132) coupled in series between a first reference node (VI) and a second reference node (mass); a second branch of two buffer capacitors (133, 134) coupled in series between said first reference node (VI) and said second reference node (mass); an output branch (DE) connected between on the one hand a first node (D) between said two controllable switches (131, 132) and on the other hand a second node (E) between said two buffer capacitors (133, 134); a boost converter (110), having an output (115) connected directly to said first node (D) between said two controllable switches (131, 132).

Abstract: A switched mode power supply assembly (1) is described, which comprises a plurality of at least two, power supply modules (10). Each power supply module (10) cyclically coupled to each other. Each power supply module (10i) comprises synchronisation control means for generating a synchronisation control signal for a next neighbouring module (10i+1) and for receiving a synchronisation control signal from a previous neighbouring module (10i+1) in order to ensure interleaved operation of all modules. Low power modules are relatively easily manufacturable in high volume.

Abstract: In a system for the conversion between DC power and AC power, including a buffercapacitor and a controllable converting arrangement, said conversion is controlled by a power control quantity that in turn depends on a first component assuring a balance between DC power and AC power and a second component indicating a change in energy stored in the buffer capacitor on a predetermined sampling time instant in the cycle of the voltage ripple on the buffer capacitor.