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tda7294 bridged

TDA7294 Audio Amplifier Circuits

TDA7294 is a monolithic integrated circuit in Multiwatt15 package, with high output power (up to 100W) intended for use as audio class AB amplifier in Hi-Fi field applications (Home Stereo, self powered loudspeakers, Topclass TV). Thanks to the wide voltage range and to the high out current capability it is able to supply the highest power into both 4W and 8W loads even in presence of poor supply regulation, with high Supply Voltage Rejection.

TDA7294 100W audio amplifier

tda7294 amp

TDA7294 PCB layout

tda7294-cab
tda7294-pcb

TDA7294 Assembly

tda7294-asm

TDA7294 250W bridged amplifier

tda7294 bridged

18 Comments

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  • jwcouvilloncox-net

    I am a newbee on this site, but not to internet audio sites.
    The amp shown in both forms is just super.
    My interest is in amps for electronic organs which can require high power, low distortion amps in the freq ranges close to rated 20hz. Hence my interest in this amp.
    questions:
    1. I have a large DC power supply which delivers ample power at 42vdc, however is is not dual polarity, only +42v. Is there a circuit ramification using the TD7294 operating on one only +dc voltage?
    2. The mute function is imnportant, but the voltage requirement is not shown. Should it be tied to +Vs?
    3. Is there a pcb design for the dual TD7294, bridged?

  • noel villarta

    How many volts? for stanby in

  • imran saleem

    to me its an error mirror error 🙂

  • ARISTIDES MUÑOZ

    ME PARECE BARBARO EL ARTICULO Y EL ESQUEMA LOGICO, PERO ME CABE UNA INCOGNITA QUE ESPERO ME LA RESUELVAN.-
    LA ENTRADA DESDE LA FUENTE MARCA V+ PERO NO VEO INDICACION DEL V-
    DONDE O COMO SE DETERMINA?
    GRACIAS DESDE YA POR LA RESPUESTA QUE ESPERO SEA MUY PRONTO.-

  • Gatewaypc112

    ST-BY connect to V+? (i want made connect to V+ on pcb, wipeout ST-BY pin out)

  • ARISTIDES MUÑOZ

    Pleade explain me the folowing question

    I saw de cicuit with TDA 7294, this is stereo with opnly one speaker?
    thanks

    • KROKKENOSTER

      Aristides hi Something fishy here for stereo you need two for the meaning of the word is TWO I repaired some car radio’s and all they did was to connect two loudspeakers internally to the same output capacitor. To do stereo you will need two damn fast switchers that switch between the two speakers. My wife bought a dirt cheap radio “stereo”with one speaker and that is a lie the headphone socket just connect the two sides in parallel!

  • spremkumar

    I want best subwoofer pre

  • r de vreede

    It’s a nice ic , but it needs a bootstrap with 5200 annd 1492 and offcourse and offcourse a stage when it’s supposed to work as subamp, an electronic crossover. , which can bevdone by some opamps. I would built in a couples of thermal circuitbreakers, cause this one gets hotttttt. , so use two vents and high grade components…… for everything, since you ask a lot from your components and to be honoust;This schematic
    will only work with not to high rms subs or speakers and buy nice once. Not 250 watts , take a look at the tda pdf. 100 watt is way too much from the unit and read about bootstraps. Building this thing certainly ain’t gonna be cheap, since the powersupplies you need , just are expensive……

  • preet

    is it work on car battery or plz provide 250watts bridged amp PCB layout plz plz i am just intrusted in sound system it is my hobby or plz provide some more circuit 60 watt or 80 watt output work with car battery

    • r de vreede

      read a book and learn math, otherwise you’ll never understand what’s happening and i have a phd micro-electronics. This is as easy as you can make it, dont excpect supersounds. And for 60 watts this is a perfect one. But don’t copy the values , or use programs for it. Those are for controlling you calculations. I recommemned first to read a lot about bootstrapping, since it’s often used and then the ic delivers the best sound , you’ll need an extra torrodial transformers, while standing once made for audio are better, but hobby or not, the capacitors don’t come cheap and the best value for the money are the nichicon kg or elna, no fc’s since they are less and fake once are 40%. buy a lcr metre and a well built ‘normal’ metre and you’ll come far. Making the pcb is easy, but it’s more important you understand what everything in a schematic. And if you do, buy the pcb. and you allways can add parts. on a euroboard next to it. gr richard

    • krokkenoster

      Preet hi! The highest power that a car battery amplifier can give is about 20 watts depending on conditions like battery charge and so on. To get all the power you will have to use an inverter that boost the voltage to what you need

  • genesis

    where should the standby pin connected????

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