Voltage converter and driving system using such voltage converter

A voltage converter for receiving a low input DC voltage and driving a piezoelectric actuator of a fluid transportation device, said voltage converter comprising:

• a boost chip having a switch element, and receiving said low input DC voltage, wherein said low input DC voltage is increased and multiplied to a high DC voltage by a switching operation of said switch element;
• a polar switching circuit connected with said boost chip for converting said high DC voltage into an output AC voltage so as to drive said piezoelectric actuator;
• and
• a controlling unit connected with said boost chip and said polar switching circuit for controlling operating frequencies of said boost chip and said polar switching circuit.

A voltage converter for receiving a low input DC voltage and driving a piezoelectric actuator of a fluid transportation device, said voltage converter comprising:

• a boost chip having a switch element, and receiving said low input DC voltage, wherein said low input DC voltage is increased and multiplied to a high DC voltage by a switching operation of said switch element;
• a polar switching circuit connected with said boost chip for converting said high DC voltage into an output AC voltage so as to drive said piezoelectric actuator;
• a timing generation circuit connected with said polar switching circuit for controlling an operating frequency of said polar switching circuit;
• and
• a resistor and a capacitor connected with said boost chip for controlling an operating frequency of said boost chip.

A driving system, comprising:

• a fluid transportation device having a piezoelectric actuator;
• and
• a voltage converter connected with said piezoelectric actuator and receiving a low input DC voltage, said voltage converter comprising:
• plural capacitors;
• a resistor;
• and
• a boost chip connected with said plural capacitors and said resistor, having a switch element and a polar switching circuit, and receiving said low input DC voltage, wherein said low input DC voltage is increased and multiplied to a high DC voltage by a switching operation of said switch element, and said high DC voltage is converted into an output AC voltage by said polar switching circuit so as to drive said piezoelectric actuator,
• wherein an operating frequency of said boost chip is controlled by said plural capacitors and said resistor.