Piezo Driver Circuit

Using a PA41 from Apex Microtechnology, this monolithic amplifier is capable of 350-V operation and delivers 660 V peak-to-peak in a bridge circuit.

The PA41 is a high-performance monolithic amplifier designed for applications requiring high voltage and high power output. Operating at a maximum voltage of 350 V, it is suitable for a variety of industrial and commercial applications where robust performance is essential. The amplifier is configured in a bridge circuit, which allows it to deliver an impressive output of 660 V peak-to-peak.

In a typical bridge circuit configuration, two PA41 amplifiers are used to drive a load, such as a motor or a transducer, effectively doubling the output voltage while maintaining a balanced load. This configuration not only enhances the efficiency of power delivery but also improves linearity and reduces distortion, making it ideal for precision applications.

The PA41 features a wide bandwidth and low distortion characteristics, ensuring that the output signal remains faithful to the input signal, even at high frequencies. Additionally, its monolithic design contributes to reduced component count and improved reliability. The device is equipped with thermal protection features, which safeguard against overheating during prolonged operation.

For optimal performance, careful attention must be paid to the selection of external components, including feedback resistors and compensation capacitors, to ensure stability and desired frequency response. Proper layout and grounding techniques are also critical in high-voltage applications to minimize noise and ensure safety.

In summary, the PA41 from Apex Microtechnology is a versatile and powerful amplifier that excels in high voltage applications, providing significant output capabilities in a compact and reliable package. Using a PA41 from Apex Microtechnology, this monolithic amplifier is capable of 350-V operation and delivers 660 V p-p in a bridge circuit.