LV8094CT Datasheet, PDF (4/15 Pages) Sanyo Semicon Device – Piezo Actuator Driver IC

Block Diagram
LV8094CT
VCC
OUT1
OUT2
RFG
Startup
control
block
Piezoelectric drive
waveform generation
register
I²C interface
Output control
GND
CLK
SCL SDA
Value of the resistor connected to the RFG pin
Inrush current flowing to the piezoelectric elements can be controlled in the LV8094CT by inserting a resistor between
the RFG pin and GND potential.
Since the resistance affects the actuator operation, the constant must be determined in a range from 0 to 3.3Ω while
monitoring the operation of the actuator.
Capacitor on the VCC line
Piezoelectric actuators are capacitive loads in electrical terms, and they operate units by charging and discharging the
charges. Since the charge between the capacitor on the VCC line and piezoelectric elements is transferred, the capacitor
must be mounted near the VCC pin. The capacitance of the capacitor required is determined by the capacitance of the
piezoelectric element. A capacitance within a range that does not affect operation must be selected.
No.A1527-4/15