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Steady-State Characteristics of the Push-Pull Piezoelectric Inverter
Masahito SHOYAMA Kuniyasu HORIKOSHI Tamotsu NINOMIYA Toshiyuki ZAITSU Yasuhiro SASAKI
IEICE TRANSACTIONS on Communications
Publication Date: 1999/08/25
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Power Supply
piezoelectric transformer, push-pull inverter, CCFL, ZVS,
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Steady-state characteristics of the push-pull inverter with a piezoelectric transformer are analyzed. The piezoelectric transformer operating in the 3rd-order longitudinal vibration mode is used in place of a conventional magnetic transformer to produce a high output voltage to light up a cold cathode fluorescent lamp. The circuit operation, the load characteristics, the efficiency and the ZVS conditions are analyzed using equivalent circuits. These analytical results are confirmed by experiments. An example of the output current control is also shown.