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    IC TDA2004R Electrical specifications

    HI
    I have audio ic ( tda2004R )
    and wont to supply it
    i have 12v @2a and 19.5v@3.4a
    i need the max output from the ic
    but the table of Absolute maximum ratings
    in page 6 _ the first table
    Click image for larger version. 

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    Output peak current 3.5 a
    and for voltage it give three figure
    what is the different between
    Operating supply voltage and DC supply voltage
    Data sheet in attachment
    thanks in advance

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    Re: IC TDA2004R Electrical specifications

    The TDA2004 is very old and has not been made for many years.

    Its maximum allowed supply voltage is 18V when it is playing but can be 28V when it is not playing.
    With your 12V supply and a 1.6 ohm speaker on each channel the output power will be about 6.4W per channel before clipping distortion. The peak current per channel will be 3.2A for a total of 6.4A that your 12V supply cannot produce.
    A peak current of 2A for both channels is only 1A for each channel which is an output power of 0.8W into each 1.6 ohm speaker.
    It will get very hot and will need a huge heatsink and maybe a fan.


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    Re: IC TDA2004R Electrical specifications

    thanks very much mr audioguru
    the supply 19.5v @3.4a
    is lap top charger
    can i but lm7805 to decrease
    19.5v or use LDO REGULATOR
    and for current may i attach a pnp transistor as high current pass
    .............
    also i can get pc power supply witch have high current capability
    but I'm guessing it just 12v
    .......
    also i can get 10 watt speaker but at what ohm ?
    to obtain that 10 watt power
    .........
    is the clipping happen because the current limit of the source?



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    Re: IC TDA2004R Electrical specifications

    TDA2004 was never a good device. It was designed to go in low cost record players and tape recorders. I think it went out of production in 1996!

    The specifications shown are "Absolute maximum ratings", that means if you exceed those figures the device will be damaged. You really need the "Electrical Characteristics" table in the data sheet to see what it can reliably produce. In particular look at the distortion vs. output power graphs, you will see that despite it's size it produces serious distortion from about 2W upwards.

    There are MUCH better devices these days that produce higher power, lower distortion and are far more power efficient.

    Brian.
    PLEASE - no friends requests or private emails, I simply don't have time to reply to them all.
    It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.


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    Re: IC TDA2004R Electrical specifications

    Quote Originally Posted by wondrous View Post
    thanks very much mr audioguru
    the supply 19.5v @3.4a
    is lap top charger
    can i but lm7805 to decrease
    19.5v or use LDO REGULATOR
    and for current may i attach a pnp transistor as high current pass
    .............
    also i can get pc power supply witch have high current capability
    but I'm guessing it just 12v
    .......
    Buy or make a modern amplifier and a power supply for it.

    also i can get 10 watt speaker but at what ohm ?
    to obtain that 10 watt power
    There are many speaker manufacturers and sellers like Part Express. Most speakers are 8 ohms for a home and are 4 ohms for a car. The amplifier datasheet will tell you the power supply voltage and current needed for 10W per channel into a 4 ohms or 8 ohms speaker.
    .........
    is the clipping happen because the current limit of the source?
    Clipping is the severe distortion produced by any amplifier when you turn up the volume too high so that it is trying to produce more power than is possible. If the supply voltage or current is limited then clipping will also happen.



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    Re: IC TDA2004R Electrical specifications

    Quote Originally Posted by betwixt View Post
    TDA2004 was never a good device. It was designed to go in low cost record players and tape recorders. I think it went out of production in 1996!

    The specifications shown are "Absolute maximum ratings", that means if you exceed those figures the device will be damaged. You really need the "Electrical Characteristics" table in the data sheet to see what it can reliably produce. In particular look at the distortion vs. output power graphs, you will see that despite it's size it produces serious distortion from about 2W upwards.

    There are MUCH better devices these days that produce higher power, lower distortion and are far more power efficient.

    Brian.
    mr Brian thanks for your advice
    sorry please can you help me to understand more about (THD: Total harmonic distortion)
    What i can expect from THD figure in the data sheet

    - - - Updated - - -

    Quote Originally Posted by Audioguru View Post
    Buy or make a modern amplifier and a power supply for it.
    that's a good advice ok i will try to do it

    There are many speaker manufacturers and sellers like Part Express. Most speakers are 8 ohms for a home and are 4 ohms for a car. The amplifier datasheet will tell you the power supply voltage and current needed for 10W per channel into a 4 ohms or 8 ohms speaker.
    i care about (bass)is the chose of speaker for BASS change here ?
    Clipping is the severe distortion produced by any amplifier when you turn up the volume too high so that it is trying to produce more power than is possible. If the supply voltage or current is limited then clipping will also happen.
    THANKS VERY MUCH



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    Re: IC TDA2004R Electrical specifications

    THD sounds bad like any amplifier with the volume turned up too high. For acid rock "noises" they like to have lots of fuzz and overdrive distortion. For most other music and speech, distortion should be less than 0.2%.

    Usually a large speaker (8" in diameter or larger) produces good bass. The datasheet of a speaker shows its frequency response when it is in a fairly large enclosure.
    The capacitor values for amplifier input and amplifier output must be calculated properly for good bass.
    A bass boost circuit feeding the amplifier can be made that gives more bass and at lower frequencies.



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    Re: IC TDA2004R Electrical specifications

    thanks
    i will consider that in my next planning



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