Mini Audio Amplifier circuit
Mini Amplifier Circuit
Description
Here is a simple and humble 2 Watts mini audio amplifier circuit suitable for small pocket radios and other portable audio gadgets.The circuit is based on Phillips Semiconductors IC TDA 7052.The amplifier can be run even from a 3V Mercury button cell.This makes it ideal for battery operated gadgets.
The IC TDA7052 is a mono output amplifier coming in a 8-lead DI package (DIP). The device is mainly designed for battery-operated portable audio circuits. The features of TDA 7052 include ,no external components needed, no switch-on or switch-off click sounds , great overall stability ,very low power consumption(quiescent current 4mA) , low THD, no heat sinks required and short-circuit proof.
The gain of TDA 7052 is fixed internally at 40 dB. . To compensate the reduction of output power due to low voltage supply the TDA7052 uses the Bridge-Tied-Load principle
(BTL) which can provide an output of around 1 to 2 W Rms(THD = 10%) into an 8 Ohm load with a power supply of 6 V.
In the circuit the potentiometer can be used to control the volume.Capacitor C1 and C2 are meant for filtering the supplyvoltage if a battery eliminator is used as supply source.For operations using a battery C1 and C2 are no necessary.
Mini Audio Amplifier Circuit Diagram with Parts List .
Mini Audio Amplifier Circuit Diagram
Notes.
- Assemble the circuit on a good quality PCB or common board .
- If you are a little expert, you can assemble the circuit in a match box including the speaker.
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hi!!!!!!!!!
i am not finding the IC in Bangalore.can anyone please tell me any equivalent.
thank you
dear sir,
i saw your amplifier i liked it.i wanted the same diagram but with more voltage[15w or more].please i want an easy diagram.
thankyou
from kiran
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Hi Steven you can use 4 ohms speaker with which you will get 1.2watt RMS, the most efficient operating zone of the IC.
Hi Sqirrel Though the IC can handle up to 18 volts with 6 volts in BTL mono operation it gives the best performance, and very safe to operate also. please refer to philips manual. 1.2 watts power is quite adequate for listening in a quite room.
What is the supply voltage you used?
Try using a higher supply voltage.
hi there..can you help me with this one..the sound is very weak..i can’t hear the music..is it possible to use 8ohm 0.3w speaker??but I tested the speaker on a device and it works perfectly..maybe my problem is the connection on the audio in..the 3.5mm audio plug..