Compact stereo audio power amplifier circuit using integrated circuit TDA7379 for 2x 38 Watts. Uses simple DC power supply or transformer, being suitable for several applications where a good quality amplifier and low cost. Ideal for, games, PC, portable audio, automobile, motorcycle, home theather.
With a minimum of components it can assemble this project.
Simple design of easy assembly, already includes the circuit of the power supply, only need to connect the transformer and the speakers. With a compact pcb allows an audio amplifier with reasonable power even using simple power supply.
The power can be from 8 to 20 Volts DC or transformer from 6 to 15 VAC.
The power at the maximum setting will be up to 38 Watts at 4 Ohms and 20VDC. With Stand-by circuit, it allows smooth on and off the amplifier without crackling.
This IC is equipped with protection against short and high temperature.
The integrated TDA7375 and TDA7377 can be used on this board, provided that the voltage limits for each of these are observed, which can be observed in the Datasheet.
Circuit diagram of amplifier circuit with TDa7379
PCB for amplifier TDA 7379
Part list
| Part | Value |
| Resistors 1/4W 5% | |
| R1 | 10k -Brown, Black, Orange, Gold |
| R3 | 1K – Brown, Black, Red, Gold |
| Capacitors | |
| C1 | 10µF – Electrolytic capacitor |
| C2, C3 | 470nF – Polyester Capacitor |
| C4 | 47µF – Electrolytic capacitor |
| C5 | 100nF – Ceramic or polyester capacitor |
| C6 | 6800uF – Electrolytic capacitor |
| Semiconductors | |
| D1, D2, D3, D4 | 1N5402 or equivalent – Silicon rectifier diode |
| IC1 | TDA7379 – Audio Amplifier Integrated Circuit |
| LED1 | 5mm Led any color |
| Connectors | |
| INL | Left channel audio input |
| INR | Right channel audio input |
| AC | Transformer Connector |
| OUTL | Left channel audio output |
| OUTR | Audio output right channel |
| Miscellaneous | |
| J1 | 12mm jumper – Piece of wire or lead |
| Welding, Transformer 12/4 Amperes or 12 Volt / 4A power Supply, Wires, Box for Amplifier, PCB, Heat Sink for TDA, etc.. | |
Download files for this assembly – PDF PCB, Schematic, PDF, silk screen
Download PDF Mirror
what are the voltage ratings of electrolytic capacitors
Hello NANDKISHOR
35V for 15VAC Transformer
25V for 12VAC Transformer
Plz pcb sizes in all posts plz tell me sir
Hello Nagesh
8.0 x 3.7 cm; 3.13 x 1.45 inches
What is pcb size?
Hello Eranga
8.0 x 3.7 cm; 3.13 x 1.45 inches
I can.t find where is R2 in pcb no
Hello Ryan
Sorry the error, In this version there is no R2
What apps sir do you use to the electronic drawings?
Hello Anthoni
Eagle or Kicad PCB.
Untuk power tda 7379 …speaker maksimal brpa waat???
where to place R2 in this circuit