CONTROL CIRCUIT AND METHOD FOR PIEZOELECTRIC TRANSFORMER

摘要

PURPOSE: A method for piezoelectric transformer is provided to obtain a stable cold-cathode fluorescent lamp. CONSTITUTION: In a piezoelectric transformer control circuit for driving a load (2)connected to a piezoelectric transformer (1), an oscillation signal as a basis of driving of the piezoelectric transformer (1) is oscillated, and the piezoelectric transformer (1) is driven by a driving circuit (4) on the basis of the oscillation signal. A pulse power supply circuit (5) for supplying a pulse voltage to the driving circuit (4) intermittently drives the driving circuit (4) by pulse-modulating the pulse voltage to be supplied to the driving circuit (4).