Title :
A low voltage high efficiency and high power density DC/DC converter
Author :
Wang, Thomas G. ; Zhou, Xunwei ; Lee, Fred C.
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
High efficiency of a DC/DC converter over very wide load range is necessary for battery supplied systems. In this paper, a 0.9 V output buck converter of which the load changes from 10 mW to 1 W is designed to optimize the efficiency by employing novel control strategies with automatic discontinuous current mode detection. High density can be achieved since current sensing is eliminated that makes the whole circuit integrable. Experimental results verified the high efficiency over the entire load range
Keywords :
DC-DC power convertors; frequency control; switching circuits; 0.9 V; 10 mW to 1 W; automatic discontinuous current mode detection; battery supplied systems; control strategies; frequency control; high efficiency; high power density; low voltage DC/DC converter; Batteries; Circuits; DC-DC power converters; Filters; Lighting control; Low voltage; Magnetic cores; Magnetic separation; Switching frequency; Switching loss;
Conference_Titel :
Power Electronics Specialists Conference, 1997. PESC '97 Record., 28th Annual IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-7803-3840-5
DOI :
10.1109/PESC.1997.616732
