Title :
Switching and conduction loss analysis of buck converters operating in DCM-only scenarios
Author :
Wei Fu ; Siang Tong Tan ; Fayed, Ayman
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
Formulas for estimating the most critical switching and conduction losses in low-power buck converters operating in DCM-only schemes with light loads are derived. The derivation takes into account the actual behavior of the converter in DCM instead of relying on commonly-used approximations that are based on CCM operation. This leads to more accurate estimation of losses. The formulas can be used by designers to correctly optimize the sizes of the power FETs and develop realistic budgets for parasitics so as to achieve the best possible efficiency.
Keywords :
power convertors; power field effect transistors; CCM operation; DCM-only scenarios; commonly-used approximations; conduction loss analysis; discontinuous conduction mode; low-power buck converters; power FET; switching loss analysis; Capacitance; Field effect transistors; Inductors; Logic gates; Resistance; Switches; Switching loss;
Conference_Titel :
Circuits and Systems (ISCAS), 2013 IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-5760-9
DOI :
10.1109/ISCAS.2013.6571998
