Tunable High-Power Multilayer Piezoelectric Transformer

Piezoelectric transformers (PTs) have been conventionally used in step-up high-voltage low-power applications such as liquid crystal display (LCD) backlighting for portable electronic devices. PTs have also been considered for step-down applications such as battery chargers for portable devices. In these applications, adapting the output impedance of the PT to meet the requirements of lower output...