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BRUTUS170S Dataheets PDF



Part Number BRUTUS170S
Manufacturers ETC
Logo ETC
Description stereo power amplifier
Datasheet BRUTUS170S DatasheetBRUTUS170S Datasheet (PDF)

USER MANUAL AX ELEKTRONIKA d.o.o. BRUTUS 170W / S stereo power amplifier BRUTUS - 170W/S is stronger brother of the popular BRUTUS - 100W/S power amplifier. BRUTUS - 170W/S is operating in the bridge configuration, which ensures such a high output. Thanks to IC TD A7294 manuf actured b y SGS or few Thompson (www.st.com) that you can buy f Euros you can make a compact 170W power amplifier. It’s PCB measures just 5,5 x 21 cm. TDA7294 is housed in Multiwatt 1 5 package and is intended for audio .

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USER MANUAL AX ELEKTRONIKA d.o.o. BRUTUS 170W / S stereo power amplifier BRUTUS - 170W/S is stronger brother of the popular BRUTUS - 100W/S power amplifier. BRUTUS - 170W/S is operating in the bridge configuration, which ensures such a high output. Thanks to IC TD A7294 manuf actured b y SGS or few Thompson (www.st.com) that you can buy f Euros you can make a compact 170W power amplifier. It’s PCB measures just 5,5 x 21 cm. TDA7294 is housed in Multiwatt 1 5 package and is intended for audio power amplifiers operating in class AB. It’s usable in wide area of applications, from Home Cinema speak er systems to active speak ers, high-end T V se ts and of cour se home brew am plifier projects. Due to it’ s large power supply voltage range is this IC capable of delivering large power to 4, 8 and 1 6 Ohms speakers. TDA7294 has 100W output power at RL = 8 Ohms; VS = ± 38V , and 100W at RL = 4 Ohms; VS = ± 29V . THD is lower than 0,1% at PO = 0. 1 to 50W and f = 20Hz to 20kHz. De tailed information on power output and THD can be seen in diagrams. Let us f irstly list basic dat a about TD A7249 in table 1. Special attention should be paid f or the max. power supply voltage which should not ex- ceed ± 49V. In case that v oltage exceeds ± 49V your TDA7294 will silently burn out. In the amplifier circuit are f our pieces of TD A7294. It means that we might find out that all f our ICs are dead as Dodo! Take a look also at table 2, where technical data for TDA7294 are listed. Another important issue is speak er impedance. Speaker should ha ve min. 8 Ohms impedance. Just for illustration, with Vss of just ± 25V and 8 Ohms speakers output po wer reaches 1 50W, while at Vss = ± 35V and 1 6 Ohms speaker we can reach output po wer of respect able 170W! You may ask yourself what can happen if instead of 8 Ohms speakers 4 Ohms ones are used? W ell, not much if TD A7294 is concer ned. Amplif ier will deliver max. output po wer to 4 Ohms speak ers limited time until ICs overheat. Due to IC’s thermal protection circuitry TDA7294 will automatically reduce output power to safe value. Schematic diagram of the BR UTUS - 1 70W/S power amplifier can be seen at fig. 2 Table 2: Electrical characteristics DMOS 170W schematic As mentioned ear lier, BRUTUS 170W/S is configured in the bridge conf iguiration. One of it’s advantages is that there is no output capacit or which im proves frequency response of am plif ier. With the swit ch S1 MUTE or PLAY mode are selected. Let us now take a look at IC itself. TD A7294 has 4 main parts: MUTE circuitry with Stand-by function, preamplifier circuitry, power output s tage and short protection circuitr y. TDA7294 has builtin protection from the shor t circuit on the out- put terminals. It has also thermal protection which tur ns off output stage, when silicon die reaches 145°C. Power supply is block ed with 1 00nF capacitors near ICs. T ogether with 2.200 µF filter capacitors ensures a clean po wer supply v oltage for IC . Le t us emp.


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