High Power Benchtop Lab Amplifier
This piezo lab amplifier is compatible with a wide range of piezo loads and has the ability to deliver high reactive power, ideal for development and testing in the lab. Dynamic driving of your piezo actuator with high voltage and current is enabled by the switching (PWM) class-D architecture.
HPA-250-A Highlights
Voltage Range
+/- 250V
Load Capacitance
0 - 20 μF
Small-Signal Bandwidth
>3kHz
Output Voltage Ripple
< 0.7 Vpp
Maximum Load Current
±7A
Product Features
A small-signal bandwidth of ~3 kHz is maintained for capacitive load sizes extending beyond 20 μF. The amplitude/phase frequency response of the driver enables easy integration in an external feedback control loop.
The ability to steer high currents into large capacitive loads enables large dynamic piezo displacement at considerable frequencies. This property turns the amplifier into useful piezo lab equipment.
Full-stroke driving of large piezo loads at high frequency requires efficient amplifier design to not turn reactive power into real power. The switching class-D architecture keeps thermal design manageable by recovering the capacitive piezo energy when (dis)charging.
From very small (nF range) to very large (> 20 μF) range capacitors, this driver remains stable and performant. Ideal for lab environments where several types and sizes of piezo-electric actuator systems get built and tested.
Technical Specifications
High-power amplifier for capacitive (piezo) loads
(600 kHz PWM):
Full-power bandwidth and maximum load current as a function of piezo actuator load capacitance.
Maximum peak-to-peak stroke capability as a function of frequency and piezo actuator load capacitance, caused by the driver's current drive capability.