Connect with us

TDA2030 amplification is very less

Discussion in 'Audio' started by rahulb, Jun 23, 2018.

Scroll to continue with content
  1. rahulb

    rahulb

    45
    0
    Mar 14, 2018
    Hi,

    I am trying to amplify the sound generated by timer 555 circuit with TDA2030A. But, the amplification is very less, hardly audible.

    Please check the circuit below:

    newp.jpg
    TDA2030A amplification circuit is taken from datasheet.

    I didn't placed the capacitor (please check the capacitor outlined with red square) in the circuit because it was going to amplifier not a speaker. It was added in the original timer 555 circuit but there was a speaker in place of amplifier there.

    Is this the reason of negligible amplification? Is some DC is passing to the amplifier?

    The speaker I am using is 8 Ohm 5 watt. I know 9v is less for TDA2030A, But I am still expecting atleast 2-2.5 watt amplification.

    I tried 8 ohm 0.5watt speaker but the sound level is the same.

    please help me.

    thanks
     
  2. duke37

    duke37

    5,297
    739
    Jan 9, 2011
    You will need a capacitor in your red square. Since it is feeding a high value resistor I guess 0.1μF (100nF) would be big enough. This will not affect the gain.

    Measure the DC voltages on the TDA2030A and check the feedback resistors for the correct values,
     
  3. Chemelec

    Chemelec

    291
    47
    Jul 12, 2016
    You can connect your Volume Control Directly to Pin 3.
    No Need for that Capacitor.

    Not too Important, But C7 is usually Recommended to be a .01

    Not sure you need R6 & R7.
    Just Put R8 to Gnd.
     
  4. Audioguru

    Audioguru

    2,725
    614
    Sep 24, 2016
    You correctly copied the single supply circuit in the datasheet except the supply voltage is too low. Its minimum supply is plus and minus 6V that is 12V but you have one 9V battery that drops below 6V. Try the TDA2030A with two 9V batteries in series but power the 555 with only one of the 9V batteries.
     
    darren adcock likes this.
  5. rahulb

    rahulb

    45
    0
    Mar 14, 2018
    hi,

    none of the methods are working. One question: can it be because I am using trimmer preset in place of rotary potentiometer which is present in the circuitry of TDA2030A IC?

    thanks
     
  6. davenn

    davenn Moderator

    13,496
    1,830
    Sep 5, 2009

    no, they are the same as long as it's the same value

    show us a circuit of with the suggested modifications, power, capacitors etc
     
  7. Ylli

    Ylli

    268
    70
    Jun 19, 2018
    When it is powered up, measure the voltage between pins 5 and 3 of the TDA2030. What is it?
     
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.
Electronics Point Logo
Continue to site
Quote of the day

-