Ultra Compact Ballast for Low Wattage HID lamps
Since around 90% of the total volume is occupied by power passive components in the HID ballast system, the passive integration is the major task to further reduce the ballast size. This project mainly focuses on the design and implementation of power passive integration, including the integrated EMI filter, the integrated LC series resonator serving as the ignitor, and integrated LC output filter. All the components are designed into planar shape with same form factor to maximize the volume utilization rate of the whole ballast.
Combining active integration technologies, the volume utilization can be increased from 45% to 80%, and the size of the proposed integrated ballast is projected to be reduced by 74% compared with the commercial HID ballast, while maintaining the same electrical performance as the discrete ballast.
Sponsored by Matsushita Electric Works.