Jan 30, 2016  Building driving circuit for ultrasonic transducer - 100khz 60W. I would advise you to use a transformer and a push-pull amplifier FET. #4 Like Reply. Ultrasonic transducer driver circuit for ultrasonic cleaner Posted by mailgirishs in forum: General Electronics Chat. I am using tpa3140d2 and try to drive ultrasonic transducer array. I am wondering what I need to do is just change the FB to inductor or not? My ultrasonic transducer array operates at 40kHz and contains 49 transducers (total capacitance is 0.13uF measured by multimeter) series with a 470uH inductor.

Hello Vipan, Few semiconductor devices can handle 1 kV directly so it is probable that a practical circuit will require a step-up transformer. It would take a lower voltage, higher current output from a driver and step up the voltage the level required by the transducer. None of our precision power op amps would be capable of providing the 100 W output requirement. I did not find any reference designs for a HV ultrasonic driver in our collection of TI Precision Designs.

You may try contacting TI's Ultrasonic Sensing E2E forum with your request. They may be able to suggest some solutions. Regards, Thomas Precision Amplifiers Applications Engineering. All content and materials on this site are provided 'as is'. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right.

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It all depends on how you want to drive the transducer i.e. The application: - It appears that you can drive at resonance or anti-resonance which indeed does make it pretty similar to how you would use a crystal in an oscillator. The graph above is taken from interesting website. I can't determine from your question what application you have but, from the (in the other question) to the type of transducers you use it seems you will be series resonating the transducer and this means it has low impedance at resonance due to L and C being in series. This means that the type of control circuit will look like this: - Taken from and this site also has some very useful information and an ebay link to a cheap one: - But, if you are still intent on building your own you can use the series resistance method to generate a feedback signal to the front-end of a power amplifier. Clearly the series resistance need only be about 1 ohm to prevent excessive power losses.