TDA 1514

[renzuken101]

Is it okay to supply the TDA 1514 IC with a “sealed Lead Acid Battery 12V 7AH” as to make the circuit portable? With this circuit.



Your help is much appreciated.

[Th3 uN1Qu3]

The TDA1514 is designed for split supply that is +, ground (0v) and -. For single 12v you'll want to use something like the TDA7396, or for longer battery life, a class D amplifier.

[renzuken101]

Thanks for the reply sir.....Can you suggest more ideas or amplifier circuits
that can run on a 12 volt battery......Because I want to create a simple
portable PA system which will also serve as my school project.....your help
is much appreciated.....BTW Im just a newbie when it comes to electronics
and my first project was a 40 watt stereo amplifier Im currently on my ninth grade....

[Th3 uN1Qu3]

If you want to keep it simple the 7396 is the way to go. Class D requires more knowledge and tools to get it up and running.

The circuit of the TDA7396 is available in its datasheet, and is as simple as it gets. If you don't want the monitoring section you simply omit the circuitry on the diagnostics pin, as for standby, a 10k resistor in series with a switch to the + side of the battery will do. When the switch is closed the amplifier will be on, when the switch is open it will go into standby. For normal, single ended operation (it can do both single ended and differential inputs), you leave the inverting input (pin 1) unconnected and connect the input signal between pin 2 and ground, which in your case will be the negative of the 12v battery.

[renzuken101]

Thank you very much for the help sir, I greatly appreciate it. Just one question, what pins of the IC are connected to the PCB, because in the pcb layout 6 pins are only connected to the circuit, but the IC (TDA 7396) has 11 pins.

Heres the link to the datasheet:
http://www.datasheetcatalog.org/data...ics/mXytqv.pdf

[Th3 uN1Qu3]

The PCB layout is given as example only, and it's very low quality anyway. This seems to be the norm for ST - they publish PCB layouts for a lot of their parts, but they're almost always unusable due to the poor picture quality. This circuit is so simple it doesn't even need a PCB - it can be easily made on stripboard.

For the typical noninverting configuration without the diagnostic circuit, which is what you want, pins 1 and 4 remain unconnected, 8 is connected via a 10k resistor and a switch to the + of the battery, input goes between pin 2 and ground (with capacitor on pin 2 of course, just like in the datasheet), and the rest are exactly like the schematic diagram shows them.

[renzuken101]

Thanks for the help sir greatly appreciated it!

[renzuken101]

sir where should I connect pin no. 8?

[Th3 uN1Qu3]

I mentioned it above. 10k resistor to positive side of battery, and add a switch in series if you want the standby function too (so that the amp doesn't stay powered on all the time and drain the batt).

[renzuken101]

Thanks sir.