Speaker Driver

Discussion in 'General Electronics Chat' started by leo1_dany, Nov 3, 2009.

  1. leo1_dany

    Thread Starter New Member

    Nov 2, 2009
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    Could any one please suggest a suitable audio preamplifier and audio power amp to successfully drive a 0.2 W speaker
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,152
    1,794
    Are you looking for chips or are you looking for system components?
    Speakers are normally specifed in terms of their impedance. What is the purpose of specifying a power level? Is it an average, a max, what??
     
  3. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
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    What is the power source to run it?

    Size requirements for design?
     
  4. leo1_dany

    Thread Starter New Member

    Nov 2, 2009
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    The power level is a max, the impedance is 8 (Ohms) and the power source is 3V. Either chips or system components would be fine, thanks.
     
  5. leo1_dany

    Thread Starter New Member

    Nov 2, 2009
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    the size should be as small as possible.
     
  6. Papabravo

    Expert

    Feb 24, 2006
    10,152
    1,794
    So if I take SQRT(.2 Watts / 8 Ohms) ≈ 158 mA which leads to an RMS voltage of 1.26 volts

    I don't know if the IC amplifiers like an LM386 will work at such a low VCC as that. Perhaps there is an alternate IC that will do the job. If not one or two transistor stages may also do the job, but with such a low single supply system you will need to do a very careful design to avoid crossover distortion, saturation, and clipping. It may be beyond my capabilities.

    BTW what is the input signal level?
     
  7. leo1_dany

    Thread Starter New Member

    Nov 2, 2009
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    do you think a TS4962M would be suitable for this purpose and if yes in addition to this do i require a preamp?
     
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