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single polarity voltage supply

Discussion in 'Electronics Homework Help' started by kenneth619, Dec 26, 2014.

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  1. kenneth619

    kenneth619

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    Dec 26, 2014
    i want to design a 0.5w audio amplifier i want to use a power supply of a single polarity +9V going thru a voltage regulator to get a 5V to power up the audio amplifier - TDA7052A

    how do i get the power supply of a single polarity
     
  2. duke37

    duke37

    5,361
    767
    Jan 9, 2011
    I looked up the specification for the TDA7052A (you could have done this) and see that it will run with input voltages between 4.5V and 18V. It will therefore run on 9V. No regulator is needed, it will just waste power.

    You can use a battery (PP3) or a plug-in power supply, 9V stabilised. The negative should be connected to the ground line and the positive to the IC supply pin. Some capacitors close to the IC to smooth the power may be necessary.
     
    KrisBlueNZ likes this.
  3. kenneth619

    kenneth619

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    Dec 26, 2014
    no it is for my assignment the requirement that a single polarity 9v
     
  4. kenneth619

    kenneth619

    3
    0
    Dec 26, 2014
    no it is for my assignment the requirement that a single polarity 9v
     
  5. BobK

    BobK

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    1,686
    Jan 5, 2010
    Duke's suggestion is using a single 9V supply. What is your problem with it?

    Bob
     
  6. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    Nov 28, 2011
    I have moved your thread to the Electronics Homework Help forum.
     
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