Title :
Magnetic-less converter based on piezoelectric transformers for step-down DC/DC and low power application
Author :
Sanz, M. ; Alou, P. ; Soto, A. ; Prieto, R. ; Cobos, J.A. ; Uceda, J.
Author_Institution :
Div. de Ingenieria Electronica, Univ. Politecnica de Madrid, Spain
Abstract :
This paper presents a very simple step-down DC/DC low power converter based on piezoelectric transformers (PTs) without any magnetic component. PTs become very interesting in this kind of applications comparing with magnetic transformers due to the higher power density. It is important to highlight that the PT has been specifically designed to avoid the use of magnetic components. Dynamic response of the power stage with the PT is analyzed, achieving a 2.5 kHz bandwidth. The use of a PT allows a wide input voltage range (20 V-75 V), 3 V, 1 W DC/DC converter.
Keywords :
DC-DC power convertors; dynamic response; piezoelectric devices; transformers; 1 W; 2.5 kHz; 20 to 75 V; 3 V; dynamic response; high power density; magnetic transformers; magnetic-less converter; piezoelectric transformers; step-down DC-DC low power converter; Bandwidth; DC-DC power converters; Impedance matching; Magnetic analysis; Magnetic resonance; Resonant frequency; Switching converters; Topology; Transformers; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2003. APEC '03. Eighteenth Annual IEEE
Conference_Location :
Miami Beach, FL, USA
Print_ISBN :
0-7803-7768-0
DOI :
10.1109/APEC.2003.1179278
