A comprehensive power analysis and a highly efficient, mode-hopping DC-DC converter

Author

Gildersleeve, Mark ; Forghani-zadeh, Hassan Pooya ; Rincon-Mora, Gabriel A.

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

fYear

2002

fDate

2002

Firstpage

153

Lastpage

156

Abstract

A comprehensive power analysis, keeping integrated circuits in mind, is presented while highlighting all conduction, switching, and dynamic power losses in a DC-DC converter. Synchronous rectification, zero-voltage switching, mode-hopping, and variable frequency operation are evaluated. The efficiency for constant frequency CCM, constant frequency DCM, and constant on-time, variable frequency DCM techniques is analyzed and the optimum technique is derived. It is concluded that a mode-hopping converter employing an asynchronous, constant on-time, variable frequency DCM operation for low output currents and a synchronous, constant frequency CCM operation for high load currents yields the best efficiency performance.

Keywords

DC-DC power convertors; losses; network analysis; power integrated circuits; rectification; comprehensive power analysis; conduction losses; constant frequency CCM; constant frequency DCM; constant on-time variable frequency DCM techniques; continuous conduction mode; discontinuous conduction mode; dynamic power losses; efficiency; integrated circuits; mode-hopping; mode-hopping DC-DC converter; output currents; switching losses; synchronous constant frequency CCM operation; synchronous rectification; variable frequency operation; zero-voltage switching; Batteries; DC-DC power converters; Diodes; Frequency conversion; Immune system; Inductors; MOSFET circuits; Switches; Switching circuits; Switching converters;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2002. Proceedings. 2002 IEEE Asia-Pacific Conference on

Print_ISBN

0-7803-7363-4

Type

conf

DOI

10.1109/APASIC.2002.1031555

Filename

1031555