Home Circuits Amplifier Audio Power amplifier modular TDA7293 in parallel #Minimus

Audio Power amplifier modular TDA7293 in parallel #Minimus

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Audio Power amplifier modular TDA7293 1

Power audio amplifier module using TDA7293 integrated circuit in modular mode with 2 tda7293 chips in parallel, including compact printed circuit board layout.
Ideal application to be used in several applications where you need an amplifier of reasonable power and small dimensions. It can be used in active amplifier, surround sound, subwoofer, etc.

Gerber file included for you to order the board in the JLCPCB or in your preferred PCB manufacture.

Modular application derating rload vs voltage supply
Modular application derating rload
vs voltage supply
Modular application Pd vs voltage supply
Modular application Pd vs voltage
supply

Modular application

  • The modular application is where several devices operate in parallel.
  • The modular application allows very high power be delivered to very low-impedance loads.
  • In this type of application one device acts as a master and the others as slaves.
    The slave power stages are driven by the master device and work in parallel together while
  • the input and the gain stages of the slave devices are disabled.
  • The master chip connections are the same as the normal single ones.
  • The outputs can be connected together without the need of any ballast resistor.
  • The slave SGND pin must be tied to the negative supply.
  • The slave STANDBY and MUTE pins must be connected to the master STANDBY and
    MUTE pins.
  • The bootstrap lines must be connected together and the bootstrap capacitor must be increased: for N devices the bootstrap capacitor must be 22 µF times N.
  • The slave IN pin must be connected to the negative supply.

See this other amplifier with tda7293
Audio power amplifier with IC TDA7294 or TDA7293 – #Minimus
Circuit power audio amplifier stereo IC TDA7293 – 200 Watts RMS
Audio Amplifier Mono With IC TDA7293 -100 Watts
Circuit schematic TDA7293 in parallel

TDA7293 in parallel schematic circuit
TDA7293 in parallel schematic circuit

PCB TDA7293 in parallel

Audio Power amplifier modular TDA7293 board bottom
Audio Power amplifier modular TDA7293 board bottom
Audio Power amplifier modular TDA7293 board silk
Audio Power amplifier modular TDA7293 board silk
Audio Power amplifier modular TDA7293 board top
Audio Power amplifier modular TDA7293 board top
Audio Power amplifier modular TDA7293 board x ray
Audio Power amplifier modular TDA7293 board x ray
Item Nº. Part Value Description Amount
Resistor’s 1/4W 5%
1 R2 20K Can be 22K 1
2 R3 680 1
3 R4, R5 22K 2
4 R6 8.2 1W 1
5 R7 30K Can be 33K 1
6 R8 10K 1
Capacitors
7 C1, C2, C12, C13 100n (104) Ceramic Capacitor 5
8 C7 100n (104, 0.1) Ceramic or polyester capacitor
9 C3, C4 220µF/63V Electrolytic capacitor 2
10 C5, C11 47µF/63V Electrolytic capacitor 2
11 C6 220pF (221) Ceramic Capacitor 1
12 C8 3.3µF/63V polyester capacitor 1
13 C9, C10 10µF/35V Electrolytic capacitor 2
Semiconductors
14 D1 1N4148 Diode 1
15 IC1, IC2 TDA7293 IC 2
Connectors
16 IN Terminal Block Connector de 2 pin –  KF350-2P Audio input 1
17 Power Terminal Block Connector de 2 pin –  KF350-3P Power supply 1
18 OUT Terminal Block Connector de 2 pin –  KF350-2P Audio output 1
Miscellaneous
Welding, Wires, PCB, Box, symmetrical power supply 20V to 40V, heatsink, etc.

Download the files of printed circuit boards in PDF and Gerber to assemble the amplifier.
Download
Mirror

Download do datasheet IC tda7293

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