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Description:
This circuit is a small stereo amplifier for all suitable applications
like amplifying small speakers, boxing, etc. It is also suitable for
car use but before, the power supply must be choked with at least 150mH
and it must give up to approximately 6 to 7 amps during the upstream
performance.
Technical data:
Performance of TDA2005M: (for this circuit); At 14.4 V supply voltage: 2 x 20 watts (stereo) into 4 Ohms.
Distortion: Approx. 0.2% at 4 Watts into 4 ohm load.
Frequency Range: Approx. 20 Hz to 22 KHz.
Input Sensitivity: Approx. maximum 150 mV rms. .
Power supply: + 8 to 18 volts, approx. maximum 3.5 Amps per channel.
Appropriate heatsink for the amplifier is SK08 with a height of 50 mm
(approx. 2.5 K per watt). You should drill the cooler after soldering
the board to center it properly. The TDA2005
also needs not be isolated from the heat sink, since the metal mounting
part of the IC is grounded. You should use thermal paste to improve the
heat dissipation. After the assembly , case construction is left to the
builder. 100K potentiometers are used for adjusting the input volume.
The potentiometers are absent in the layout. The 100K resistors need
only be installed if the 100 K potentiometers are not used as shown in
the layout.
You should use a well designed quality transformer to get less
noise. It will be another good way to use a sufficient battery to power
the circuit. Keep the supply wires as short as possible. Input source
should be isolated from the external noises too. It is recommended to
use coaxial cable to connect the input audio.
Click here to download schematic, PCB and layout files.
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