Electronics > Beginners

First Circuit - TDA1517P

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vidarr:
Finally did it and built this amp circuit. It is my first "real" circuit from scratch (I have ESP32s and other dev boards, I connect sensors and program, etc). I never really built anything. Everything was recycled from about 10 different electronic devices I picked out of the trash over the past year. For the past month or two, I de-soldered a lot of pieces and learned what they all are and looked up datasheets and read, etc. The amp was from a sound card. Finding this was what decided what I was going to build - I needed some "seed". This circuit was built from the datasheet for the amp IC -- TDA1517P.

I want to take this to another level now. I have piles of resisters, capacitors, transistors, diodes, etc. I would like to increase the power of this little amp just a little bit. Not a lot at all. Just a little boost. I have sets of 2, 4, 6, 8 ohm speakers. This amp is for 4 ohm speakers. The speakers now are 4 ohm, but I know they can handle more power. Would be nice to get a little more out of it. I watched tutorials about building an amp out of transistors instead of a more complete IC like I used, but I never found a way to build on to an IC like this. How to add to it?

Thank you for any ideas or help!

Wimberleytech:
Congrats on your first circuit.
The output power is specified at Vp=14.4 volts.  How are you powering the circuit?

vidarr:
I have two power supplies. One is the 12v in the picture (just a typical, decent quality, alixpress 12v). The other is a power supply ranged from -12v to +12v, with also 3.3v, 5v, 0, -5v, GND. I have not tried using this second psu yet. I am not sure exactly how to do it. Maybe -12v and +3.3v???

edit: The datasheet says 6v min to 18v max.
Also, is says reverse polarity 6v. Does that mean I cannot use -12v?

Wimberleytech:

--- Quote from: vidarr on October 17, 2018, 11:41:18 am ---I have two power supplies. One is the 12v in the picture (just a typical, decent quality, alixpress 12v). The other is a power supply ranged from -12v to +12v, with also 3.3v, 5v, 0, -5v, GND. I have not tried using this second psu yet. I am not sure exactly how to do it. Maybe -12v and +3.3v???

edit: The datasheet says 6v min to 18v max.
Also, is says reverse polarity 6v. Does that mean I cannot use -12v?

--- End quote ---

Use the 12V supply.

The chip is protected from a reverse-polarity fault up to 6V.  Don't worry about that spec, and don't reverse the polarity of the supplies.
Connect ground of the supply to ground of your circuit (pins 2 and 5), and +12V to Vp (pin 7).

vidarr:
Yeah, that is how I did it and it seemed OK. I just want a little more power. Do you think it is the 12v not enough?

I want it to be just a bit louder, then I will solder it together and put it in a box.

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