Power amplifier using the TDA7293 chip manufactured by ST Microelectronics, includes schematic and PCB design for easy mounting of the power amplifier. The TDA7293 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 sup-ply the highest power into both 4Ω and 8Ω loads. The built in muting function with turn on delay simplifies the remote operation avoiding switching on-off noises.
Features of the integrated circuit TDA7293
- Very high operating voltage range(±50v)
- DMOS power stage
- High output power (100w @ thd =10%, rl = 8Ω, vs = ±40v)
- Muting/stand-by functions
- No switch on/off noise
- Very low distortion
- Very low noise
- Short circuit protected (with no in-put signal applied)
- · Thermal shutdown
- Clip detector
- Modularity (more devices can be easily connected in parallel to drive very low impedances)
The device is provided with both stand-by and mute functions, independently driven by two CMOS logic compatible input pins.
The circuits dedicated to the switching on and off of the amplifier have been carefully optimized to avoid any kind of uncontrolled audible transient at the output.
The sequence that we recommend during the ON/OFF transients.
The application of figure 5 shows the possibility of using only one command for both st-by and mute functions. On both the pins, the maximum applicable range corresponds to the operating supply voltage.
A little blow circuit audio amplifier IC TDA7293
The assembly is similar to TDA7294, but this IC allows use power supply with higher values and thus has a higher output power can reach to 100 Watts.
To mount the circuit we have the suggestion of the printed circuit board with PDF files, and Eagle files (.SCH and .BRD) if you need to edit this layout in Cadsoft Eagle. The red line shown in the drawing of the layout is to make the connection using a piece of wire (jumper).
Follow us on social media
To use the mute function, simply connect a three-position switch connector on M / ST. A key can be used for panel mounting enclosure and connected by wires to the connector. The link is as follows the thread of the connector means connecting the second born and the wires on the other side borns. The operation is as follows when the key is to GND and the circuit is muted to V + when the circuit starts up. This process has a delay determined by capacitor C5 and C6. If you do not want or do not need to mute just connect the first and second borns or even need to use a connector just make a jumper to connect the dots.
The power supply must be symmetrical as shown in this article, the transformer must be equivalent to 1.5 X Total power amplifier, as this power is related to the maximum input voltage characteristics curves refer to the Datasheet and thus determine the power amplifier to have given power output, and so knowing how your VA transformer should have. The filter capacitors can be used to 22000μF values from 4700μF (for the most demanding).
Schematic TDA7293 power amplifier
Suggested printed circuit board for mounting the amplifier
Part List for assembly of the power amplifier TDA7293
|R1||10k – Brown, Black, Orange, Gold|
|R2, R4, R5||22k – Red, Red, Orange, Gold|
|R3||33k – Orange, Orange, Orange, Gold|
|R6||680 – Blue, Gray, Brown, Gold|
|R7||10 – Brown, Black, Black, Gold|
|C1||1µF /250V – Polyester Capacitor|
|C2, C3||10µF /63V – Electrolytic capacitor|
|C4, C5||1000µF /63V – Electrolytic capacitor|
|C6, C7||100nF/100V – Ceramic or polyester capacitor|
|C8, C9||22µF/63V – Electrolytic capacitor|
|C10||100nF /100V – Polyester Capacitor|
|C11||220pF/100V – ceramic capacitor|
|IN||2-pin terminal block – Audio input|
|OUT||2-pin terminal block – Audio output|
|PW||3-pin terminal block – Symmetrical power supply|
|Power supply||Symmetrical power supply 15 a 42V|
|Welding, wires, printed circuit board, Heat sink for the integrated, screws, box, etc.|
Download PDF Files to assembly the amp: TDA7293 PCB Layout, Layout components, Silk screen, datasheet and Eagle Library
Download PDF Mirror
Download Eagle Files for TDA 7293 – .SCH and .BRD
Download Eagle Files
Buy diy kit, PCB and TDa7293 chip in Aliexpress
We are sorry that this post was not useful for you!
Let us improve this post!
Tell us how we can improve this post?
26 thoughts on “Audio Amplifier Mono With IC TDA7293 -100 Watts”
your eagle file canNOT be downloaded… plse help…
Can i use assymetrical power supply?
What is the size of the board?
can i used this amplifier with Circuit adjustable bass filter?
Thanks Toni for the post I built this amplifier and works great. Sounds clean,powerful Bass and treble
Can you say you using any software for paint pcb?
What is the length and width of the PCB layout size? Please help me
How to print the layout pcb format PDF. Please
Can You Please Explain why are the C2 and C9 used. i meant to say they are in parallel with 1000uf caps.does it make any difference if we wont use 100nf in parallel? just curious to know why are they places so!
Big capacitors handles low frequency ripple and mains noise and major output load changes.
Small capacitors handle noise and fast transients.
how can I remove the mute and standby
how can I remove the mute from this amplifier pls I need your help
hi toni , greetings
is it enough 30 0 30 5amp for this circuit ?
thanks in advance .
price kay he
se puede reemplazar este integrado por el 7294… que voltaje se suguiere?…aguardo respuesta gracias
Hello friend… i would like to know how can i change the output to mixed feedback?
thanks in advance.
All – since megaupload is shutdown, please find below the updated link to download the PDF:
Hiya what is the appropriate. (A) current for this amplifier?cheers
do you have a parallel circuit and pcb layout of tda7293?
thank you very much.
necesito saber que otra pastilla es compatible con la TDA7293
i does not nown what say.thank you very much!