Patent ID: 6885172
Filing Date: 2005-04-26
Classification: H01L,H02M

Abstract:
1. A driving device for driving at least one power transistor of a voltage converter that includes a piezoelectric transformer, the at least one power transistor having a first non-drivable terminal coupled to an input voltage and to the input of the piezoelectric transformer, the converter further including an inductor coupled between the input voltage and the piezoelectric transformer, and a resistor coupled between a second non-drivable terminal of the at least one power transistor and ground, the driving device being coupled to the drivable terminal of the at least one power transistor, to the input of the piezoelectric transformer, and to the second non-drivable terminal of the at least one power transistor so as to detect a first voltage value and a second current value, the driving device being adapted to cause the turning on of the at least one power transistor if the first voltage value is equal to a third prefixed voltage value, and being adapted to cause the turning off of the at least one power transistor if the second current value is equal to a fourth prefixed current value.