Instruments For Testing Your Innovations
Ultrasonic transducer driver generally outputs high power, high current, and high voltage. These drivers are usually operating at ultrasound frequencies. Ultrasonic frequencies are generally greater than the audio frequencies (20kHz to 20kHz). Most common ultrasonic transducers resonant frequency is 25kHz and 40kHz, but as high as MHz is possible.
Most transducers are operating at resonant. At resonant frequency, these devices are resistive. High voltage and high current from the driver is needed to produce high power ultrasound. The TS250 family of drivers can output up to 60W for single driver and up to 150W for multiple drivers. The output power is calculated in Equation TBD.
Some ultrasound transducers are capacitive. At ultrasonic frequencies, these transducers impedance become low. A high current driver is need to drive these supersonic devices.
In addition to high power, piezoelectric ultrasonic transducers need high voltage. Depends on power and resonant resistance, the required voltage is usually in the 10V to 100V range or higher. Typically a high frequency piezo amplifier amplifies a signal generator to generate the high voltage needed for these ultrasonic transducers as shown in Figure 1. The TS250 is a perfect ultrasonic transducer driver.
Figure 1. Piezo ultrasonic transducer driver connection diagram.
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Figure 2. Parallels two TS250 ultrasonic transducer drivers quadruples the output power.
Further read on ultrasonic tranducers driver design.
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Figure 3. TS250 piezoelectric ultrasonic driver frequency response.
PDF Version of this App Note
Model |
Voltage Range |
DC Current |
Max Peak Current |
TS200- |
- |
0 – 4.0A |
0 – 5.0A |
TS200- |
- |
0 – 2.8A |
0 – 3.8A |
TS200- |
0V to + 15V |
0 – 3.5A |
0 – 4.5A |
TS250- |
- |
0 – 5.0A |
0 – 6.0A |
TS250- |
- |
0 – 3.1A |
0 – 4.4A |
TS250- |
- |
0 – 2.1A |
0 – 3.0A |
TS250- |
- |
0 – 1.7A |
0 – 2.5A |
TS250- |
- |
0 – 4.0A |
0 – 5.0A |
TS250- |
- |
0 – 2.1A |
0 – 3.0A |
TS250- |
- |
0 – 1.7A |
0 – 2.5A |
TS250- |
- |
0 – 2.1A |
0 – 2.5A |
To be determine