This is simple portable audio amplifier circuit. This circuit built based on IC TEA2025 which is a monolithic integrated audio amplifier in a 16-pin plastic dual in line package manufactured by UTC. Circuit has Internal Thermal Protector. It is designed for portable cassette players, mp3 players and radios. You can also use it as your smartphone or PC audio amplifier. This circuit require 9V power supply to work, you may use a power supply circuit with output 9V @500mA DC current or a 9V lead acid battery.
Here is the portable audio amplifier schematic diagram for stereo audio input/output:
and here for mono audio input/output (bridge)
Stereo per channel
VCC=9V; RL=4 ohm/3W
VCC=9V; RL=8 ohm/2W
Bridge Application
VCC=9V; RL=8 ohm/5W
VCC=9V; RL=4 ohm/8W
Supply Voltage min = DC3v @ 500mA
Supply Voltage max = DC12v @ 500mA
Supply Voltage recommended = DC9v @500mA
Download TEA2025 datasheet document for your project reference:
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View Comments
Can I connect pin 1 to the ground in stereo mode?
please tell me the value of potentiometer i need to use.....and also tell me where i should connect its treminals,because i dont know where input amp and output tone control is......please help
hey friend please show the same diagram of stereo amp with volume,bass control and power LED......because i am not good in electronics......i can understand with help of a diagram....
please tell me if it will work well for 4ohm speakers....???
also please provide a volume control and an LED indicator for the circuit...!!
yes, it should be work for 4 ohm speaker.
for volume control, use potensiometer. pin 1 > ground ; pin 2 > output (connected to input amplifier) ; pin 3 input (connected to output tone control/preamp).
use 470ohm resistor series to LED connect to + and ground of power supply should be work for indicator...
I am interested in having the theoreotical stuff of IC 2025....plz....
you can use 16v capacitor and 1/4 watt or 1/2 watt resistor
what is the voltage value of capacitor and what is the power of resister {as example 1 watt or different}