complete stereo amplifier circuit including printed circuit board to power of 2 X 15 Watts. Using minimum of components in the integrated circuit TDa7297 ST Microelectronics. This IC presents in its interior two bridge amplifiers, making it useful for use where a stereo amplifier need easy assembly. may operate with voltages 6-18 volts and has protection against excess temperature.
About the TDA7297 – 15+15w dual bridge amplifier
- Wide supply voltage range (6v -18v)
- minimum external components
- no svr capacitor
- no bootstrap
- no boucherot cells
- internally fixed gain
- stand-by & mute functions
- short circuit protection
- thermal overload protection
Schematic of the amplifier using TDA7297 or TDA7297SA
Suggested printed circuit board (PCB) for the power audio amplifier
List of material for mounting the circuit TDA7297
| Part | Value |
| Resistor’s 1/4 W 5% | |
| R1 | 1.5K – Brown, Green, Red, Gold |
| R2, R3 | 47K – Yellow, Violet, Orange, Gold |
| Capacitor’s | |
| C1 | 2200µF/25V – Polarized Electrolytic Capacitor |
| C2 | 100nF/250V – capacitor polyester |
| C3 | 10µF/25V – Polarized Electrolytic Capacitor |
| C4 | 220nF /100V – capacitor polyester |
| C5 | 220nF /100V – capacitor polyester |
| Semiconductors | |
| IC1 | TDA7297 or TDA7297SA – Integrated circuit audio amplifier stereo bridge – ST Microelectronics |
| LED | Red LED |
| Miscellaneous | |
| VCC | Connector power supply |
| IN | Audio input connector |
| OUT1 | Audio output 1 connector |
| OUT2 | Audio output2 connector |
| J1 | J12MM -Piece of wire 12mm |
| P1 | 50K – Double logarithmic potentiometer |
| Wire, PCB, Box, power supply 9-18 Volts / 2 Amps *, etc.. | |
Download the PDF files to mount the amplifier – Datasheet Tda7297 the PCB, PCB layout components, PCB Silk and Schematic.
Download PDF Mirror
As far as I can tell, the datasheet for the TDA7297 does not specify if the electrical ratings are per channel or the total of both channels combined. Admittedly, I am relatively new to all of this, so perhaps my specific question is as follows:
I have a collection of speakers ranging from 2(Ohm) – 16(Ohm), 1(Watt) – 40(W), and everything in between.
If the suggested rating of 8-Ohms is per channel (8-Ohms for one channel, 8-Ohms for the other, and in no way affected by changes in the other), then my options for how to safely connect the speakers would be completely different than if the suggested rating of 8-Ohms is referring to the combined total from BOTH channels.
I am trying to figure out how to evenly spread the load over the two channels and this is impossible to do without knowing if I am going to fry the chip if I, for instance try bridging the two output channels into a series/parallel speaker circuit (to average out differing speaker impedences, etc…)
thanks brother…. i like it
Thanks!
thankyou toni good work
Hello Siva
Thanks your feedback!
How can i connect this wih my car?
Hi, may I just ask, can this be powered by a car battery? 12-14 Volts DC
Hi,
I am new to this amplifier I wated to know whether is this IC having a good bass
Hello
I can replace polyester capacitor with ceramic capacitor or not ?
hi.pcb file can you send your email?with pertous and altium.
Hi,
What is the scale or size of the image to be taken in print? for Etching PCB.
Hello Rajthilak
4.9 x 4.7 cm
Hi,
I have built the amp as per diagram and is working.
The problem that I am having is the the heat sink is getting too hot, I am concerned burning the I.C.
Do you have any pointers that I can look at to resolve this issue?
Thank you
Hello Bytme
Use a larger heatsink.
hhhhhhhhh
in a easy way.
Please i need an 5.1 circuits diagram anyone send the circuits
Very nice circuit it works perfectly
Please i need an 5.1 circuits diagram anyone send the circuits
Really nice circuit. I satisfied with it’s performance.
My question is that, why 220nF capacitors are used to input of TDA7297?
im done with the pcb
now assembling components
Ensamble uno pero Distorziona el amplificador
Aunque a bajo volumen. Que puede ser?
Prove con varios algunos alimentadores de 1.5 A 2A a 12 volst
Ensamble uno pero Distorziona el amplificador
Aunque a bajo volumen. Que puede ser?
POR FA
gracias por el aporte ESTE integrado se lo puede sustituir en su lugar por el tda7266
it works perfectly
speakers are 4 or 8 ohms?
thanks
olá amigo toni olha eu gostava de montar este amplificador ,o tda 7297.obrigado?
pl send me pcb ( with out components ) IAM IN INDIA IF IT IS POSIBLE .SO THAT ICAN GIVE YOU MY ADDRES
THANKS