Hi all,

I am planning on driving a piezo tweeter from an AVR. The construction of the transducer is a piezo element glued to a paper cone. That assembly is bolted to a plastic dispersion horn as shown…

This tweeter is rated at 50 watts.

Question is… How do I calculate the max square wave FET voltage I can give it?

Being piezo, there is no coil resistance to do the math. The terminals show near infinity.

I am thinking even the duty cycle plays a part in this, but let’s say 50% duty cycle, how much P-P voltage can I give this thing, and what is the math behind it, being we have a piezo (infinity) resistance.

My thinking is this: 50 volt square wave? With almost zero resistance, there is little current. Any help is appreciated.

Thanks, all…