TDA7379 amplifier circuit diagram 2x 38W, 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.
The TDA7379 is a new technology class AB audio processor amplifier able to work either in DUAL BRIDGE or QUAD SINGLE ENDED configuration. The exclusive fully complementary structure of the output stage and the internally fixed gain guarantee the highest power performances with extremely reduced component count. The on board clip detector simplifies gain compression operation. The fault diagnostic makes it possible to detect mistakes during the set assembly and wiring in the equipment.
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About the circuit
Simple project of easy assembly, it already includes the power supply circuit, you only need to connect the transformer and the speakers. With a very compact board it allows an audio amplifier with reasonable power even using a simple source. You can even use a PC power supply.
The power supply can be 8 to 20 Volts DC or transformer 6 to 15 VAC.
The power at maximum configuration will be up to 38 Watts at 4 Ohms and 20VDC. With Stand-by circuitry, it allows the amplifier to be turned on and off smoothly without clicks.
This integrated board is equipped with protection against short circuits and high temperature.
On this same board you can use the integrated TDA7375 and TDA7377, ST540 as long as you respect the voltage limits for each one, which can be seen in the Datasheet.
Usage Table for TDA73XX (TDA7379, TDA7375, TDA7377 and STA540)
| CI | TDA7375 | TDA7377 | TDA7379 | STA540 |
|---|---|---|---|---|
| Maximum Voltage | 18V | 18V | 20V | 22V |
| Power Maximum |
2X 25W @4 Ohms | 2 × 20W @4 Ohms | 28W @4 Ohms | 2X 34W @ 8 Ohms. |
Circuit diagram of TDA7379 amplifier circuit diagram 2x 38W
PCB for TDA7379 amplifier circuit diagram 2x 38W
BOM for assembling the power audio amplifier project
| Part | Value |
| Resistors 1/4W 5% | |
| R1 | 10k – Brown, Black, Orange, Gold |
| R3 | 1K – Brown, Black, Red, Gold |
| Capacitors | |
| C1, C4 | 47µF/25V — Electrolytic Capacitor |
| C2, C3 | 680nF — Polyester Capacitor |
| C5 | 100nF — Ceramic or polyester capacitor |
| C6 | 2.200uF a 4.700uG/25V — Electrolytic Capacitor |
| Semiconductors | |
| D1, D2, D3, D4 | 1N5402 or equivalent – Silicon rectifier diode |
| IC1 | TDA7379 – Audio Amplifier Integrated Circuit |
| LED1 | 5 mm red LED |
| Connectors | |
| CN1 | Audio Input |
| AC | Transformer connector |
| OUTL | Left channel audio output |
| OUTR | Audio output Right channel |
| Miscellaneous | |
| Solder, 15V / 4 Amp transformer or 20 Volt / 4A supply, wires, case for the Amplifier, PCB, heatsink for TDA, etc. | |
Download PDF files for this assembly – PCB, Component side, Silk, Pads, Schematic Datasheet TDA7379.
Gerber added
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