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180W RMS 4-Channel Amplifier with TDA7386 + PCB

Fig 1 - 180W RMS 4-Channel Amplifier with TDA7386 PCB

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The TDA7386 four-output integrated circuit is a class AB amplifier rated at 180W RMS "unbalanced power supply" in a single package with few external components.

This audio amplifier is designed for Sony®, Kenwood®, Pioneer® and other high performance car radios.

Features

  • High output power capacity:
  • 4 x 45W / 4Ω max.
  • 4 x 28W / 4Ω @ 14.4V, 1KHz, 10%.
  • 4 x 24W / 4Ω @ 13.2V, 1KHz, 10%
  • Low distortion
  • Low output noise
  • Stand-by function
  • Mute function
  • Auto- mute function when minimum supply voltage is detected
  • Low number of external components:
  • Internal fixed gain (26dB)
  • No external compensation
  • No bootstrap capacitors

Based on the TDA7386 IC, it is also ideal for use in home studio amplifiers, computers with quadraphonic sound cards such as SoundBlaster Live! Creative Labs Inc. or MosterSound Diamond Multimedia / S3, Active Box, home theater, etc...

Each channel of the TDA7386 provides 45W RMS with a sufficient power of 14.4 volts, at a load of 4 ohms and a distortion factor of about 10%.

The amplifier schematic shown in Figure 2 is a simple design with few external components, making it an easy amplifier to build.
Fig. 2 - 180W RMS 4-Channel Amplifier with TDA7386 Schematic

Components List

  • IC 1 ..................... Integrated circuit TDA7386
  • R1  ...................... 47K resistor (yellow, purple, orange)
  • R2  ...................... 10K resistor (brown, black, orange)
  • C1, C2  ............... 1μF electrolytic capacitor
  • C3 ....................... 100nF electrolytic capacitor
  • C4  ....................... 220μF electrolytic capacitor
  • C5, C6, C7, C8  ....100nF electrolytic capacitor
  • C9  ....................... Electrolytic capacitor 470nF
  • C10  ..................... Electrolytic capacitor 47μF
  • B1  ....................... 2-Pin Board-Cable Connector
  • B2 ........................ 5-Pin Board-Cable Connector
  • B3, B4, B5, B6  ... 2-pin board cable connector
  • Others .................. PCB, tin, wires, etc.

Power supplies

For lovers of amplifiers with IC, it is best to have a simple power supply, because many have simple variable test bench sources that make testing much easier, in addition to an audio amplifier power for the car, we will necessarily have the simple power supply.

Since this amplifier operates at low voltage, the consumption is quite high. According to Ohm's law, we can calculate this current as follows, using the formula.
P = V * I

Where;
  • P = power, V = voltage, I = current.
Soon;
  • I = P / V
  • I = 180/14.4
  • I = 12.5 A
Due to the high current consumption indicated in the above formula, the connections to ground and to the power supply must be made with extreme care.

In car radios, the heat sink is small, but it is in contact with the radio housing, which is made of metal, which greatly facilitates heat dissipation.

For home amplifiers, which are usually in constant use, a good heat sink should be used. "It depends on how you are going to use it," you say, putting a cooler on the heatsink like the ones used in ATX computers.

Download

We provide the files with the PCB, the schematic, the PDF, GERBER and JPG, PNG and provide a direct link for free download and a direct link, "MEGA".

Click on the direct link to download the files: Layout PCB, PDF, GERBER, JPG


If you have any questions, suggestions or corrections, please leave them in the comments and we will answer them soon.

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My Best Regards!!!

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