My dear Brian Burk,
Once again I welcome you to this touch forum for another querry on the subject matter.
It is seen that the circuit is designed to give a frequency up to 300 hz..
My application requirement is for a piezo actuator which is driven at 115 volts , 400 hz. and for experimentation purpose , I want to drive my actuator at 115 volt at frequency of 1 khz..
Pl. advise me whether the existing circuit has to be modified to upgrade the the desired frequency or the existing set up is suffient to cater for upgradation with gain adjustment.
With Regards ,
Please see section "3.4 Filtering and Adapting PWM Waveforms" in the DRV8662EVM User's Guide to change the bandwidth of the DRV8662EVM.
You will need to adjust the input filter to the DRV8662 so that the filter cut-off frequency is higher than 1kHz. If your input is a sine wave, rather than a PWM, try removing the input fitler (see section "3.4.2 Remove Filter for Analog Input").
Let me know if you have any questions.
Brian P. Burk
Analog Applications Engineer
Dallas, TX USA
Mr. Brian Burk,
I haven't bought the item so far.Now it is very clear that the circuit can be used to drive the piezo actuator with our required frequencies.
Thank you ,
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