TDA7293 amplifier TDA7294 amplifier circuit diagram #Minimus. Audio power amplifier project based in integrate circuit tda7294 IC circuit diagram or TDA7293 amplifier. Compact printed circuit board and is ideal to be used where a compact amplifier and with adequate power to be used in various applications, such as computer amplifier necessary, games, MP3 Player, Home Theater, Sound environment, amplified Cash, etc.
The TDA7294 is a monolithic integrated circuit in Multiwatt15 package, intended for use as audio class AB amplifier in Hi-Fi field applications (Home Stereo, self-powered loudspeakers, Top class TV). Thanks to the wide voltage range and to the high out current capability, it is able to supply the highest power into both 4 Ω and 8 Ω loads even in presence of poor supply regulation, with high Supply Voltage Rejection. The built-in muting function with turn on delay simplifies the remote operation, avoiding switching on-off noises.
- Thermal shutdown
- short circuit protection
- very low distortion
- no boucherot cells
- very high operating voltage range (±40v)
- high output power (up to 100w music power)
- dmos power stage
- no switch on/off noise
- very low noise
- muting/stand-by functions
Features TDA7293 amplifier TDA7294 amplifier circuit diagram #Minimus.
- Classic application using the IC TDA7293/TDA7294
- To assemble with TDA7294 or TDA7293 just by changing the position of a capacitor.
- Great audio quality
- Easy assembly.
- Uses just a few components in the assembly
- Reduced size board 50 mm X 36 mm
- Power -/+ 18-36 VDC (Symmetrical power supply)
- Maximum power: 80 (7294) – 100 (7293) Watts RMS
- Output Impedance: 4 at 16 Ohms.
Table of equivalent IC that can be used in our Amplifier.
|Maximum voltage at 4 Ohms*||33 VDC||30 VDC||26 VDC||22 VDC|
|Maximum voltage at 8 Ohms*||40 VDC||38 VDC||35 VDC||30 VDC|
*Symmetric power supply, stereo mount.
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Schematic TDA7293 amplifier, TDA7294 amplifier circuit diagram #Minimus.
Suggestion of printed circuit board for assembly of mini amplifier
The transformer is connected at the power supply should be able to provide power equivalent to 1.4X the amplifier power. This power is on the DC voltage used.
In the chart below we can see what will be the maximum power, by matching Po(W) and Vs(+/-).
Eg: for 25V => 60W and 30V => 83 Watts. This when connected to speakers of 4 Ohms. This THD to 0.5%.
Note that for 4 Ohms the maximum is +/- 30VDC for TDA7294.
Below is the chart to TDA7294 linked into 8 Ohms – The power supply can be up until +-36VDC.
To determine what will be its maximum DC voltage according to the transformer using the following formula: Vf = (1,4 x Vi) – 0,5
Where: Vf = final voltage
Vi = Voltage in the transformer
Ex: For a 24-0-24 transformer have:
Vf= (1,4X24) – 0,5 = 33V
Ex: Transformer for +/-28VDC
28=(1,4xVI) – 0,5 = 1,4Vi=28-0,5 = Vi =27,5/1,4 = 19,64C
With this value at hand just go on the chart and find what will power for this case!
For TDA7293, see the Datasheet
Notice the layout how to assemble the capacitor properly for TDA7294 or TDa7293.
BOM for assembling the Minimus Power Series amplifier with TDA7294/93
|Resistors 1/4 W 5%|
|R1, R3, R4||22K — Red, Red, Orange, Gold|
|R2||680 — Blue, Gray, Brown, Gold|
|R5||10K — Brown, Black, Orange, Gold|
|R6||33K — Orange, Orange, Orange, Gold|
|R7||4.7 Ohms — Yellow, Violet, Gold, Gold|
|C1, C2, C3,||100nF — Ceramic or Polyester Capacitor.|
|C4, C7||22µF/50V — Electrolytic Capacitor|
|C5, C6||47µF/50V a 220µF/50V — Electrolytic Capacitor|
|C9||1µF — Polyester Capacitor|
|C10, C11||10µF/50V — Electrolytic Capacitor|
|D1||1N4148 — Semiconductor Diode|
|IC1||TDA7293 or TDA7294 – Audio amplifier integrated circuit.|
|IN||Audio Input Connector|
|PW||power supply connector|
|OUT||Audio Out Connector|
|Solder, Wires, Pci, Box, 18 to 36 Volt DC /2.5 Amp symmetrical supply, etc.|
Download the files for this assembly Datasheet, PDF printed circuit board, schematic, component layout.
- IC TDA7294, TDa7294S, TDA7294HS, TDA7294V – PDF datasheet — Atualizado.
- Download the PDF Datasheet of TDA7295 IC
- Download the PDF Datasheet of TDA7296 IC
- Download the PDF Datasheet of TDA7293 IC
Buy TDA7293 Amplifier board in AliExpress
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10 thoughts on “TDA7293 amplifier TDA7294 amplifier circuit #Minimus”
Compre una placa en ali exprés e alimentado hasta 18v ,1 AM pero solo se calienta con toda 94
biem pineado con capacitor tambiem alimente con 25 v,1am igual no me arranca pero si calienta el ic no sé dónde anda el error Garcías me ayudarán resolber antes empiese ser frustrado…… Gracias compas
چه نوع خازنی C9 است؟ با سه پا؟
A quick note on C9.
C9 must be configure correctly for the IC you are using.
If a TDA7294 then C9 must be connected ONLY from pin 14 to pin 6 of the IC.
If you use a TDA7293 the C9 (the bootstrap capacitor) the chip manufacturer, ST or STMicroelectronics , says this —
So you have the option, EITHER pin 14, or pin 12, BUT NOT BOTH!
IMO, the drawing is correct in trying to show both options, however the write-up fails to indicate well that it is an option depending on which IC you are using.
I hope this helps.
Thanks for the remark, really 93 and 94 was discreet!
Hi I assembled this Mono amp but when I supply 12 volts 1 amp power I get a loud human only. Can you help me put this to work.
What type of capacitor C9 is? with three legs?
I bought this circuit board on E.Bay and assembled it but it doesn’t work. I am getting only a hum in the speakers. I am not sure about C9 capacitor so I coupled 2 capacitors. Can you help me to find te fault on it.
HI, John di!
if U have sprint layout TL074 as filter subwoofer please send to my email
We have a project of a stellar LM3886 High-end DC-servo amplifier complete with Sprint-Layout and schematic/pictures, check it out.
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(Please post on your blog.)