Connect with us

Does the TDA2030 need negative potential?

Discussion in 'Audio' started by rahulb, May 5, 2019.

  1. davenn

    davenn Moderator

    13,353
    1,775
    Sep 5, 2009
  2. Aniket Kumar Singh

    Aniket Kumar Singh

    3
    0
    May 8, 2019
    For any kind of amplifier dual power supply is the first priority for any electronics engineer, however single supplies can also be employed. The basic difference is that if you apply dual supply topology then your signal gets amplified between +Vcc and -Vee. In case of single supply the amplification is between +Vcc/2 and -Vcc/2.
     
  3. Audioguru

    Audioguru

    2,618
    593
    Sep 24, 2016
    Correct.
    I disagree. The amplification is between +Vcc and 0V.

    Also, many car amplifiers are single supply and are bridged for almost 4 times the output power of a single amplifier. Since each speaker wire is driven and each is at half the supply voltage then an output coupling capacitor is not needed to block the DC.
     
    davenn likes this.
  4. Aniket Kumar Singh

    Aniket Kumar Singh

    3
    0
    May 8, 2019
    I agree , I meant to say that for example if you are using 12 volts the amplification will be between +6 volts
     
  5. Audioguru

    Audioguru

    2,618
    593
    Sep 24, 2016
    Take an LM386 little amplifier IC and power it from 12VDC and 0V. Its maximum output into an 8 ohm speaker is not 12V peak-to-peak, instead it has voltage losses that are shown on a graph in its datasheet as a typical maximum peak-to-peak of only about 6.5V, not 12V. Since the voltage swing is less then the current swing is also less so the actual output power is almost only 1/4 as much as you think.
     

    Attached Files:

  6. WHONOES

    WHONOES

    741
    153
    May 20, 2017
    If the Pk - Pk is only 6.5V then O/P power is only ((6.5 / 2) * 0.707) / R times the first part of the sum which equates to 1.32Watts into 8Ω at 12V supply.
     
  7. davenn

    davenn Moderator

    13,353
    1,775
    Sep 5, 2009
    that's still incorrect as there is no -6V
     
  8. Audioguru

    Audioguru

    2,618
    593
    Sep 24, 2016
    With an LM386 amplifier driving an 8 ohm speaker and a 12V supply, the speaker peak-to-peak voltage swing is +3.25V to -3.25V.
     
  9. aurelZ

    aurelZ

    64
    7
    Jun 10, 2019
    Yeah maybe is obsolete but is for sure one of the best APA chips ever made.
    This chip with +/- 18V gives the best results but if you don't have such a trafo then you can try
    single power supply with 24V,check this...
    2011811223154844.gif
     
  10. Audioguru

    Audioguru

    2,618
    593
    Sep 24, 2016
    The datasheet for the old TDA2030A has specifications with a +/-16V supply so that it does not overheat. Only 10W into 8 ohms is guaranteed but 12W is typical with 0.5% distortion. The datasheet shows two bridged TDA2030A ICs typically producing 34W into 8 ohms at probably 0.5% distortion with a +/-16V supply.
     
  11. hevans1944

    hevans1944 Hop - AC8NS

    4,258
    2,008
    Jun 21, 2012
    You can buy circuit-board adapters that accept surface mount ICs and fan their leads out to through-hole pads. It is fairly easy to "drag solder" the surface mount component onto the adapter using an ordinary soldering tip and perhaps a head-mounted magnifier. Google for YouTube videos on how to do this. I did it with a 6-pin PIC that came in an SMD package, but later I ordered the same PIC in a DIP configuration, which made bread-boarding sooo much easier.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads
Loading...
Electronics Point Logo
Continue to site
Quote of the day

-