Title :
Design of half-bridge piezo-transformer converters in the AC adapter applications
Author :
Choi, Sungjin ; Kim, Taeil ; Cho, Bo H.
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ.
Abstract :
As a viable alternative to magnetic transformers in the power supply for portable electronics, this paper presents a miniaturized off-line travel adapter or charger for cellular phones using the piezoelectric transformer. Various design considerations in the design of ac PT adapters are investigated before coming up with the proposed pseudo-resonant topology. A prototype hardware design is also presented and verified by simulations and experiments
Keywords :
battery chargers; mobile handsets; piezoelectric devices; power convertors; transformers; AC adapter; cellular phones; half-bridge piezo-transformer converter; magnetic transformer; piezoelectric transformer; portable electronics; power supply; pseudo-resonant topology; Capacitance; Cellular phones; Circuit topology; Frequency; Inductors; Power supplies; Resonance; Switches; Transformers; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2005. APEC 2005. Twentieth Annual IEEE
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-8975-1
DOI :
10.1109/APEC.2005.1452927
