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10W audio amp? Answered

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ok, so i want to get this one audio amp to work, but i can't seem to figure out how to wire it! the first picture is a schematic, and i have NO idea what the connections are, 1, 2, and 3 the second is a picture of the amplifier chip

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westfw (author)2008-08-31
  • (1) is the signal input.
  • (2) is the power supply positive voltage.
  • (3) is signal and power "ground."
  • Rx/Cx prevents high-frequency oscillation

There's more info in the TDA2003 datasheet, including a PCB layout. If you haven't seen it.

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Sandisk1duo (author)westfw2008-08-31

Thanks! i've seen that datasheet, but i couldn't make sense of the schematic I do not make pcbs, i just solder the components to each other and to the chip, looks bad, but it works!

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gmoon (author)Sandisk1duo2008-08-31

Use a heat-sink, if you're aiming for 10 watts...

From the datasheet, looks like you need a 2 ohm load for 10W output. Use several speakers in parallel (four 8 ohm speakers == 2 ohms.)

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guyfrom7up (author)gmoon2008-08-31

or 2x 4 ohm speaker in parallel

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Sandisk1duo (author)2008-08-31

ya, $85 for yours, or i can make my own for free

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bumpus (author)Sandisk1duo2008-08-31

Mm, it would seem to be a toss up... :D

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bumpus (author)2008-08-31

Well, you could skip all the confusing parts, and buy mine
:D

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