In this paper, a high current pulse power supply for the feeding of a flash lamp has been developed, on the base of a multilevel converter with cascaded cells. The pulsed high power is provided by capacitive energy storage, directly connected to the cells of the converter. A low current ripple is reached by interleaved switching technique. The original topology, its design regarding the sizing of the storage cells, and the associated control are presented. Simulation results as well as a realization of a prototype for industrial use are described in details.