IC TDA7375 amplifier circuit diagram with PCB

tda7375

IC TDA7375 amplifier circuit diagram with PCB. Circuit of quadruple audio amplifier using integrated circuit TDA7375a audio amplifier for systems surround. Circuit of quadruple amplifier for systems surround using the ci tda7375, for potency of 7 watts for channel in the version amplifying quad or 15 watts in the dual version (stereo). Could arrive to 35 watts in the version.

The TDA7375AV is a technology class AB car radio 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 possible power performances with extremely reduced component count.
The on-board clip detector simplifies gain compression operation. The fault diagnostics makes it possible to detect mistakes during car radio set assembly and wiring in the car.

Circuit Of Quadruple Audio Amplifier Using Integrated Circuit Tda7235 For Systems Surround
Tda7375 Pinout

All features

  • High output power capability2 x 43 W max./4 Ω
  • 2 × 37 W/4 Ω EIAJ
  • 2 × 26 W/4 Ω @14.4 V, 1 kHz, 10%
  • 4 × 7 W/4 Ω @14.4 V, 1 kHz, 10%
  • 4 × 12 W/2 Ω @14.4 V, 1 kHz, 10%
  • Minimum external components count:No bootstrap capacitors
  • No Boucherot cells
  • Internally fixed gain (26 dB BTL)
  • Standby function (CMOS compatible)
  • No audible pop during standby operations
  • Diagnostics facility for:Clipping
  • Out to GND short
  • Out to VSshort
  • Soft short at turn-on
  • Thermal shutdown proximity
  • Protections:Output AC/DC short circuit: to GND, to VS and across the load
  • Soft short at turn-on
  • Overrating chip temperature with soft thermal limiter
  • Load dump voltage surge
  • Very inductive loads
  • Fortuitous open GND
  • Reversed battery
  • ESD

Operation of the circuit of the audio amplifier with tda7375

The capacitor C8 uncouples the internal tension divisor. The capacitors C5 and C6 are the filter for Power supply. The capacitors of 2200µF / 25V are the output capacitors. Vs is the Power supply that can be a car battery or a supply of 14 volts.

Get new posts by email:
Follow us on social media

IC TDA7375 amplifier circuit diagram schematic

Ic Tda7375 Amplifier Circuit Diagram Schematic
Ic Tda7375 Amplifier Circuit Diagram Schematic

Power supply for the circuit

It can be with a transformer 12V/30VA, a rectifier bridge and a capacitor electrolytic of 4700µF or (larger). The maximum consumption of current with loads of 4 Ohms is 2.1 A. You can use loads of 2 ohms, but he/she also remembers to increase the size of the of heat-sink because the circuit integrated in Multiwatt package it will heat up a little more.

TDA7375 amplifier PCB, printed circuit board

Tda7375 Amplifier Pcb Printed Circuit Board Top
Tda7375A Amplifier Pcb Printed Circuit Board Top
Tda7375 Amplifier Pcb, Printed Circuit Board Component View
Tda7375A Amplifier Pcb, Printed Circuit Board Component View

Information on assembly of the circuit audio amplifier

When assembling the circuit, remember that this quadruple amplifier presents the channels two and four inverted, then you must connect the speakers with the inverted polarity in these outputs, in attention to the polarity of the electrolytic capacitors that must be of good quality.

Block diagram of TDA7375 for more information see the datasheet in PDF format of integrated circuit TDA7375

TDA7375 Pinout

Tda7375 Pinout Circuit Of Quadruple Audio Amplifier Using Integrated Circuit Tda7235 For Systems Surround
Tda7375 Pinout

Quad, stereo and 2.1 connection scheme

Tda7375 Amplifier Circuit Diagram With Pcb Quad
Quad

Standard board connection, connect jumper J1 and J2 as indicated in red.

Tda7375 Amplifier Circuit Diagram With Pcb 2.1
2.1 Amplifier For Stereo + Subwoofer

To switch on this mode connect jumper J1 and J2 as indicated in red. You should also connect the terminals of capacitors C9 and C10. If you prefer they can be omitted. So can C2 and CN4.

Tda7375 Amplifier Circuit Diagram With Pcb 2.0
2.0 Estereo Amplifier

In this mode you should connect the jumper cables as indicated in red. The 2,200uF capacitors are not required. However, if you intend to use it in quad mode in the future, make a jumper with a piece of wire at the bottom of the board, under the capacitors and 2.200uF. The audio inputs will be on the CN1 and CNâ‚‚ connectors. The audio output will use 2 connectors. If you prefer you do not need to install C9, C10, C11, C12, Cn4, Cn6, C2, C4.

BOM for mounting or amplifier.

Last Update: 07/28/2021 22:43

PartValueDescriptionQuantity
Resistors 1/4W
R110kBrown, black, orange, gold1
Capacitors
C1, C2, C3, C4470n/63VPolyester capacitor4
C51.000uF/25VElectrolytic capacitor1
C6100nFCeramic Capacitor1
C710uF/25VElectrolytic capacitor1
C847uF/25VElectrolytic capacitor1
C9, C10, C11, C122.200uF/25VElectrolytic capacitor4
Semiconductors
CI1TDA7375AV4-channel audio amplifier IC1
Miscellaneous
CN1OUT1 — Output 1Terminal block 2 pin 5.08 mm1
CN2OUT2 — Output 2Terminal block 2 pin 5.08 mm1
CN3IN1 — Input 1Terminal block 2 pin 5.08 mm1
CN4IN2 — Input 2Terminal block 2 pin 5.08 mm1
CN5IN3 — Input 3Terminal block 2 pin 5.08 mm1
CN6IN4 — Input 4Terminal block 2 pin 5.08 mm1
CN7DC — Power SuplyTerminal block 2 pin 5.08 mm1
CN8OUT3 — Output 3Terminal block 2 pin 5.08 mm1
CN9OUT4 — Output 4Terminal block 2 pin 5.08 mm1
J1, J2Pin header 3 pinOperation Mode Selection2
J3Jumper20 mm piece of component terminal or wire1
Solder, Wires, PCB, Box, power supply.

Download complete package – Datasheet + schematics + boards in PDF, PNG and updated with Gerber
Download PDF    Mirror

Download PDF IC TDA7375, tda7375v, tda7375a, TDA7375AV

Buy TDA7375/77/79 diy kits in AliExpress – Worldwide free shipping

How useful was this post?

Click on a star to rate it!

Average rating / 5. Vote count:

No votes so far! Be the first to rate this post.

As you found this post useful...

Share on the social networks!

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Photo of author
About the author
Xtronic.org blog author. Electronics technician for the technical school of Brasilia - Brazil. Interested in electronics, circuits and technology in general.

5 thoughts on “IC TDA7375 amplifier circuit diagram with PCB”

  1. i wouldnt make the tracks to C1 C3 and C4 so narrow. It makes the etching almost doomed to failure for most enthusiasts. Better to replace those bits of track with a jump wire between two spacious points. I can recommend this because I tried etching the board as above and fucked it up.

    Reply
  2. Ola Toni.. eu estava pensando em montar este projeto surrond,
    mas este layout ai esta de pessima qualidade, tem um borrado ai ligando gnd e o pino do ci que não da pra saber o que é isso, se é mesmo uma trilha ou borrado, se vc puder dar uma verificada nisso eu agradeço.att

    Reply

Leave a Comment