This class D switching amplifier modulates the pulse width of the control signal and thus controls the piezo output voltage.
When the piezo actuator is discharged, a patented circuitry for energy recovery stores the returning energy in a capacitor and makes it reusable for the next charging cycle. Thus, the E-482 achieves high efficiency with peak currents of up to 6A and average currents of up to 2A.
The power amplifier will also accept the E-509 sensor-/servo-controller module for closed-loop operation.