[TDA7294]Building my first chip amp

[Flashgun]

Hi guys,

as I have already written in the wrong section of the forum (my bad ), I'm going to build a chip amp based on the IC TDA7294V for a school project (and maybe later convert it into a dockstation or something like that). I have already built a couple of chip amps using spare parts desoldered from old cd-players, but this is the first time trying something more "serious". Surfing the web for infos I found an incredibly simple project by "Mustafa Dere" (Tda 7294 100w peak -70w rms) that seems to suit my needs, what do you think about it? Has anyone a schematic for it (since the one posted on that page doesn't really seems to match the PBC)?

In case I wanted to follow the schematic printed on the official datasheet of the IC, could I just skip the pins 1, 9 and 10 since I don't need the mute and standby functions? And (last question, I promise ) what's the difference between "Vs (Power)" and "Vs (Signal)"?

Sorry for my stupid questions, but I really am new in this "field" . Thanks for all the help you may give me!

[pacificblue]

The only difference between Mustafa Dere's schematic and the datasheet's is the addition of an input blocking resistor and a few different component values.

You cannot skip the pins 1, 9 and 10, because the amplifier won't work without them. No signal on those pins means amp muted and in stand-by.

The distinction between power and signal supply voltage is only necessary for the so called high efficiency application. In that case you have two supply voltages. The signal supply will always be connected to the high voltage, while the power supply voltage will be connected to the low voltage most of the time and only be switched to the high voltage during high power demand. For your application they should be connected together as shown in the datasheet.