#Skema power ampli 170watt Pc

If connected to the amplifier's earth bus, you will get oscillation and/or poor distortion performance.įigure 1 - LM1875 / TDA2050 Power Amplifier Circuit Diagram (One Channel) Note that the speaker must return to the central 'star' earth (ground) point. The amp is also remarkably simple to build - if you have a PCB! These ICs are a cow to wire on Veroboard - it is possible, but results are unpredictable.įigure 1 shows the schematic - this is almost the same as in the application note (redrawn), and with added RF protection at the input. You can also use the TDA2050 (from SGS-Thompson), which has almost identical performance and (remarkably) the same pinouts! As it turns out, the amp in the NS application circuit is pretty good, as is the (very similar) one from SGS. This project (unlike most of the others, but in a similar vein to Project 19) is based almost directly on the typical application circuit in the National Semiconductor specification sheet. For those who want to build their own 'Gainclone' amplifier, this will certainly do the job :-)

#Skema power ampli 170watt Pc

There are many instances where a simple and reliable power amplifier is needed - rear and centre channel speakers for surround-sound, beefing up the PC speakers, low powered tweeter amplifier, etc. But if this current decrases, the transistors are not heating so much, but the s ound gets worse. As this current incrases, the sound of the amplifier gets better, but the end transistors are more heating. This current can be regulated with the 500Ω trimmer resistor. this is a class B amplifier, this means, that a current must flow through the end transistors, even if there is no signal on the input. capacitor C2 regulates the higher frequencies (treble), as the capacitance grows, the higher frequencies are getting quiter.

capacitor C1 regulates the low frequencies (bass), as the capacitance grows, the low frequncies are getting louder. The and transistorsĬan be any NPN type power transistor, but do not use Darlington types. As you can see, in this design the components have a big tolerance, so you can build it almost of the components, which you find at home. The maximal input voltage is around 0.8 - 1V. The optimal supply voltage is around 50V, but this amp work from 30 to 60V.