Patent ID: 8639133
Filing Date: 2014-01-28
Classification: G03G,H01L,H02M

Abstract:
1. A power supply apparatus comprising: a piezoelectric transformer; a holding unit that holds the piezoelectric transformer; a conductive rubber member that connects the holding unit to the piezoelectric transformer; a drive unit configured to supply a drive signal to the piezoelectric transformer; an output unit configured to output a high-voltage from the piezoelectric transformer according to the drive signal from the drive unit; and a current reduction unit configured to reduce a surge current generated when the drive unit is driven, wherein the current reduction unit includes a resistor and a diode, which are connected between the drive unit and a primary side of the piezoelectric transformer, wherein the drive unit includes an inductor and a switching element connected in series to the inductor, and wherein an anode of the diode is connected to a connection point between the inductor and the switching element, a cathode of the diode is connected to the primary side of the piezoelectric transformer, and the resistor is connected in parallel to the diode.