Effects of Spread Spectrum on Output Filter of Buck Converter


  • J. Jankovskis Riga Technical University
  • D. Stepins Riga Technical University
  • N. Ponomarenko Riga Technical University




Buck converter, electromagnetic interference, output filter, power losses, switching frequency modulation


Consideration is being given to the use of spread spectrum technology (SST) as the one for noise suppression and the one with coexisting action on the components of output filter of buck converter. The analysis shows that the use of SST produces an additional stress on the output filter components such as power inductor and output capacitor. For both components switching modulation generates extra power loss (as opposed to unmodulated case) which increases with the growth of frequency deviation. During this more energy is dissipated just within frequencies which are below nominal switching frequency, than is saved within frequencies that are higher than the nominal switching frequency. But this effect is not strong; it is possible to compensate it by slight increase of nominal switching frequency and thus to maintain high efficiency of converter in the case of SST usage as well.

DOI: http://dx.doi.org/10.5755/j01.eee.19.5.4367

Author Biography

D. Stepins, Riga Technical University

Dr.Eng., Researcher and lecturer at Riga Technical University, Institute of Radio Electronics




How to Cite

Jankovskis, J., Stepins, D., & Ponomarenko, N. (2013). Effects of Spread Spectrum on Output Filter of Buck Converter. Elektronika Ir Elektrotechnika, 19(5), 45-48. https://doi.org/10.5755/j01.eee.19.5.4367