Title :
Buck+half bridge (d=50%) topology applied to very low voltage power converters
Author :
Alou, P. ; Oliver, J. ; Cobos, J.A. ; Garcia, O. ; Uceda, J.
Author_Institution :
Div. de Ingenieria Electron., Univ. Politecnica de Madrid, Spain
Abstract :
Buck+Half Bridge (d=50%) topology is a very suitable circuit for low output voltage, high output current applications with a wide input voltage range. Its small signal transfer function is very complex and should be considered to optimize the dynamic response, efficiency and size of the power converter. Small signal and large signal behavior of this topology are analyzed through their corresponding average models. Design guidelines, drawn from this analysis, are applied on two low-voltage (1.5 V) wide input voltage prototypes to validate the goodness of this topology
Keywords :
DC-DC power convertors; bridge circuits; dynamic response; field effect transistor switches; network topology; power MOSFET; power semiconductor switches; switching circuits; 1.5 V; buck+half bridge topology; design guidelines; dynamic response optimisation; efficiency optimisation; high output current; large signal behavior; low output voltage; size optimisation; small signal behavior; small signal transfer function; very low voltage power converters; Bridge circuits; Buck converters; Circuit topology; Low voltage; MOSFETs; Prototypes; Signal analysis; Threshold voltage; Transfer functions; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-6618-2
DOI :
10.1109/APEC.2001.912449
