Title :
Effect of geometry variation of LTCC distributed air-gap filter inductor on light load efficiency of DC-DC converters
Author :
Lim, Michele H. ; van Wyk, J.D. ; Liang, Zhenxian
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA
Abstract :
A low profile power inductor fabricated using low temperature co-fired ceramics (LTCC) technology has been demonstrated to improve the light load efficiency of a converter, without the use of additional control circuitry. This is brought about by means of a distributed air gap design, which causes a change in inductance with load current. Variation in inductor geometry is performed experimentally to study the effects on the light load efficiency of a converter. By decreasing the conductor width of the inductor, the light load efficiency can be further improved by 30% compared with using commercial inductors of similar inductance. Variation in the number of parallel conductors in a multi-conductor structure does not have significant effect on light load efficiency improvement
Keywords :
DC-DC power convertors; air gaps; ceramic packaging; power inductors; power integrated circuits; DC-DC converters; LTCC technology; distributed air-gap filter inductor; inductor geometry variation; light load efficiency; low temperature co-fired ceramics technology; power inductor; Air gaps; Ceramics; Conductors; DC-DC power converters; Filters; Geometry; Inductance; Inductors; Lighting control; Temperature control; LTCC; conductor width; distributed air-gap; parallel conductors; planar integration; variable inductance;
Conference_Titel :
Industry Applications Conference, 2006. 41st IAS Annual Meeting. Conference Record of the 2006 IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
1-4244-0364-2
Electronic_ISBN :
0197-2618
DOI :
10.1109/IAS.2006.256793
