Study on EMI Reduction of DC-DC Buck Converter

Long Huang; Fang Ping Yu; Tai Long Liu; Peng Li; Qi Dou Wu; Hua Biao Jin

doi:10.4028/www.scientific.net/AMR.893.742

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 893Study on EMI Reduction of DC-DC Buck Converter

Study on EMI Reduction of DC-DC Buck Converter

Abstract:

DC-DC buck converter has been more widely used in automotive electronics because of its advantage of high efficiency and small size. However, it is one of the main causes of the conducted emission and radiation noise. The working principle and the mechanism of DC-DC buck converter which generate conducted emission and radiation noise in different frequency were analyzed. Then, two methods were proposed to reduce the low frequency radiated emission. One is weakening the AC current value of the inductor current through increasing the value of the output inductor, the other is reducing the loop area by adding the output filter, and both of the methods were verified by comparative test. Finally, the two schemes were used in designing the On-board controller, and it passed the radiated emissions (ALSE method) according to the international standard CISPR 25-2008.

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Advanced Materials and Engineering Materials III

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Periodical:

Advanced Materials Research (Volume 893)

Pages:

742-746

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.893.742

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Online since:

February 2014

Authors:

Long Huang, Fang Ping Yu, Tai Long Liu, Peng Li, Qi Dou Wu, Hua Biao Jin

Keywords:

DC/DC Buck Converter, EMI, Loop Area, On-Board Controller

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