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Can I use a Audio amplifier for driving a exciter speaker?

Tomoaki Yoshida
Expert 2200 points
Other Parts Discussed in Thread: TAS5421-Q1

Hi,

 

I don't know about an exciter loudspeaker well.

It drives by a low frequency, and the case for which an exciter loudspeaker is used as a vibration device is being considered.

An exciter speaker will be used 16ohms 10W to 20W.

is it possible that an audio amplifier like a class-D amplifier TAS5421-Q1 for driver of exiter speaker driver?

I think that it's possible drive a exiter speaker .

But the it's used for low frequency , It's worried whether there aren't other anxious points.

 

thanks.

  • 0
    TI__Guru**** 189401 points
    Hi, Yoshida-san,

    I do not have any experience with this application at this power level, but previously this concept was used in cell phones.

    The trick is, you have to drive the speaker at the resonance frequency in order to get it to vibrate. So, you need some way to determine that (maybe a specification from the speaker manufacturer), but yes, all the information I have says that our amplifiers can be used in this sort of application.

    You should verify that the output filter you plan to use and the load impedance don't have an issue at the resonance point.

    -d2
  • 0 in reply to Don Dapkus
    Expert 2200 points
    Hi, DonThank you for your reply.
    I didn't have an idea to drive the speaker at the resonance frequency in order to get it to vibrate.
    It will be helpful for me.
    But , I don't know in detail to how to use class-D amplifier for exciter speaker driving.
    Here Did you mean what the resonance frequency and the resonance frequency to say, the speaker or LC filter?
    Will more of a class AB amplifier is easy to control?
    I think that it will consider whether use any speaker.thanks.yoshida
  • 0 in reply to Tomoaki Yoshida
    TI__Guru**** 189401 points
    Hi, Yoshida-san,

    Since the exciter load is just a speaker, no special considerations are needed to drive it with a class-D amplifier.

    Sorry I wasn't clear, the exciter has a particular resonance frequency. When driven at that frequency, it will vibrate.

    Either class-AB or class-D can be used for this application. All the benefits of using a class-D amp will be realized in this application.

    -d2