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DRV8662: need the amplifier to drive a mechanical actuator

Marvin Cantos
Expert 5835 points
Part Number: DRV8662

Hi Team, 

Good day. I am posting this inquiry on behalf of the customer.

"We are doing research in Fluid mechanics at Queen Mary University

We have designed a device that uses a speaker as an actuator.
To drive the speaker we amplify a signal out of a DAQC using a commercial sound amplifier
The speaker causes fluid to eject from our nozzle like a print head
Actually, I want to buy an amplifier from TI, but not sure which one to choose
We need the amplifier to drive a mechanical actuator (a speaker or piezo) by amplifying the signal out of a DAQC
let me explain our challenge. At the moment we are using a commercial sound amplifier, Monacor STA-200 for this purpose
the thing is when we measure the electric current through the nozzle we see that the amplifier is introducing a lot of noise
If it is the only way to tackle our problem I would make the amplifier myself. You don't have the whole device/reference design/solution to offer?"

Please help to advise. Thank you for extending your support.

Kind regards, 

Marvin 

  • 0
    TI__Mastermind 41035 points

    Hi Marvin,

    It's a little unclear how to narrow down a recommendation, if noise is the only issue. If their actuator is piezo, the customer can select one of our piezo actuators, as there's only a few to pick from. If they want a speaker amp, do they need class-D or class-AB like a line driver? Something simple like the TPA6211T-Q1 may be a good starting place.

    Thank you,
    Jeff McPherson