Title :
Ultra high efficiency of 95 percent for DC/DC converter - considering theoretical limitation of efficiency
Author :
Takagi, Masakazu ; Shimizu, Katsuhiko ; Zaitsu, Toshiyuki
Author_Institution :
TDK Corp., Chiba, Japan
Abstract :
The authors have considered the theoretical limitations in the efficiency of DC/DC power converters used in telecommunication applications. The theoretical limitation of efficiency in a single-stage topology and a two-stage topology is compared. As a result, they have selected a two-stage converter consisting of a buck+half bridge topology. This topology is suitable for high output current and low output voltage DC/DC converters. The prototype using a buck+half bridge topology has been made (3.3 V 60 A). The efficiency of the overall converter was 92% at full load, and an ultra high efficiency of 95% at half load was successfully achieved
Keywords :
DC-DC power convertors; bridge circuits; telecommunication power supplies; 3.3 V; 60 A; 95 percent; DC/DC power converters; buck-half bridge topology; full load efficiency; single-stage topology; telecommunication applications; two-stage topology; Bridge circuits; Circuit topology; DC-DC power converters; Energy consumption; Inductors; Low voltage; Power supplies; Prototypes; Rectifiers; Telecommunication switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-7404-5
DOI :
10.1109/APEC.2002.989327
