Summary of MINI STEREO AUDIO AMPLIFIER
This article describes a Mini Stereo Audio Amplifier project using the TDA2822 IC, designed for portable players and radios. It supports a supply range of 3V to 12V (tested at 9V), delivering up to 1W per channel into an 8 Ohm load with a frequency response of 20Hz to 20kHz.
Parts used in the Mini Stereo Audio Amplifier:
- TDA2822 IC
- PCB
- 8 Ohm Speaker
- Headphones (for 3V operation)
- Loudspeakers (for 12V operation)
This project is a Mini Stereo Audio Amplifier based on TDA2822 IC.
DESCRIPTION
The dual low power amplifier built around TDA2822 8pin DIP. IC, it is mainly designed to use in portable players, radios and other building block project. A 3V supply can be used to drive headphones providing 20mW in 32 Ohms per channel, and a 12V power supply will provide 1W in 8 Ohm per channel for small loudspeakers.
SPECIFICATIONS
- Supply 9V DC (supply Range 3V to 12V)
- Load 8 Ohm Speaker
- Gain 39dB
- Input Impedance 100K Ohm
- THD 10%
- Frequency Response 20Hz to 20Khz
SCHEMATIC
PARTS
PCB
Source: MINI STEREO AUDIO AMPLIFIER
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What is the primary application of this amplifier?
It is mainly designed for use in portable players, radios, and other building block projects. -
Can this circuit run on a 3V power supply?
Yes, a 3V supply can be used to drive headphones providing 20mW in 32 Ohms per channel. -
What is the maximum power output with a 12V supply?
A 12V power supply will provide 1W in 8 Ohm per channel for small loudspeakers. -
Does the amplifier support a wide voltage range?
Yes, the supply range is 3V to 12V, though it is typically supplied with 9V DC. -
What is the gain specification of this project?
The gain is specified as 39dB. -
How does the frequency response compare to human hearing?
The frequency response covers 20Hz to 20Khz. -
What is the input impedance of the amplifier?
The input impedance is 100K Ohm.
