High power-density igniter with integrated LC resonator for low wattage HID ballast

This paper presents the design of a high power-density igniter with integrated LC resonator for low wattage HID lamp ballasts. Electromagnetic integration technology is applied to reduce the number of passive components and the overall volume of the igniter. By applying the inter-winding capacitance as the resonant capacitance, the integrated igniter is simply composed of a magnetic core and two magnet wire windings. By selecting the proper terminals and exploiting the advantage of integrated LC resonant structure, the obtained output voltage is twice as much as an ordinary LC resonator. The design and implementation of the igniter are presented. Both small signal measurement and high voltage test are applied. The experiment results show that the application of passive integration technology into low wattage passive modules is promising.