TDA3050 データシートの表示（PDF） - STMicroelectronics
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TDA3050 Datasheet PDF : 4 Pages
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Never operate these ICs with no heatsink, even without any load connected. The quiescent
dissipation will cause them to overheat very quickly, and may damage the internal circuitry.
Output power is rated at 20W per channel, but with music signals you will probably be able to
get a peak power of about 25W into an 8 ohm load. Refer to the data sheet (see link below) for
the full specification on the IC. Note that the TDA spec sheet claims 50W, but this is overly
optimistic and cannot be achieved in practice.
Photo of Completed Amp (On Heatsink)
How Does It Sound?
The sound quality is very good - as I said at the beginning, I would not call it audiophile hi-fi (but then again - I
might, with caveats), and provided the amp is never allowed to clip it sounds excellent. Because of the
overload protection (which I have never liked in any form) this amp provides somewhat nastier artifacts as it
clips than most discrete amplifiers.
For those who think an incredibly short feedback path length is actually important, a surface
mount resistor can be used for R5, either soldered directly to the leads (pins 2 and 4) or the
pads on the copper side of the board. This will provide a feedback path of less than 20mm in
total, and could be made less than 10mm (at the risk of damaging the IC with excess heat).
This amp is ideal for Hi-Fi PC speakers, and could also be used as a midrange and/or tweeter
amp in a tri-amped system - there are a lot of possibilities, so I will leave it to you to come up
with more.
Power Supply
A suitable power supply diagram is shown below. This is adequate for as many amplifiers as needed, simply
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