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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I got no sound on pin2/3
I Like
sorry am diploma student in electronics i want to do portable amplifier as my project plz can u help for giving detail information and calculations of voltage;power;current etc?
I need to mono IC brand is rohm and function is 9 v5w but have a difficult is I don't know what is the type and package, you can help me? See I have what kind of type is suitable for I use?
its realy work
now begin make the volume from input and on/off switch
i think the mono design for the bass and stereo design for the treble
what is the blue rectangle with 47k symbolizing?
is it a capacitor or a resistor???
of course it is resistor...
Hi,
sir thanks,
It's good runing.
HI,
I made this circuit run but volume is very low.how to increase the volume?
and i used o/p capacitor is 0.22,63v placed .15,16v
- check the power supply
- check the input signal, too weak signal makes low power output
ic may be heated why??
because it handle a low resistance load (speaker).
Hi, ave done this project and its working. Where shud i connect volume, bass and tone control knob?
Also, can this circuit be cascaded with that of LA4508 circuit to boost on overal gain?