Stereo Amplifier Circuit using TDA2822 IC

TDA2822 is one kind of Op-amp (operational amplifier) that can be used in low output applications like a stereo amplifier. This IC has some features like it is available in 16-pin power DIP package, low crossover distortion, low-quiescent current. The IC TDA2822 can be worked with a supply voltage of 3V to 15V. The applications of this IC include portable audio systems, preamplifier, hearing aid mini radio, headphone amplifier, etc. The IC TDA 2822 can deliver 0.65W of output power. The IC TDA2822 can deliver 0.65W o/p power for each channel into a 4-ohm loudspeaker of the 6V supply voltage in the stereo method and 1.35W into a 4-ohm loudspeaker 6V supply voltage in the bridge mode. This article discusses stereo amplifier circuit using TDA2822IC in bridge mode, characteristics, and its PCB layout.

Stereo Amplifier Circuit using TDA2822 IC

As a preamplifier, this TDA2822 IC is the best choice in stereo high power amplifier circuits. It consists of two inputs as well as two outputs. The inputs and outputs of this IC can deliver 250mw of output power. The amplifier circuit in the IC is suitable for noise-free operation. The outputs of this circuit can directly couple to the speakers via the coupling capacitors.

Characteristics for TDA2822

The characteristics of TDA2822 include the following

  • Voltage Supply down to 1.8v
  • Low intersect distortion
  • Low inactive current
  • Stereo or Bridge arrangement

Pin Configuration of TDA2822 IC

The pin configuration of TDA2822 IC is shown below.TDA2822 IC consist of 8-pins such as

Pin Configuration of TDA2822 IC
Pin Configuration of TDA2822 IC
  • Pin1-Output Pin1
  • Pin2-VCC
  • Pin3-Output pin2
  • Pin4-GND
  • Pin5-Input (-) 2
  • Pin6-Input (+) 2
  • Pin7- Input (+) 1
  • Pin8-Input (-) 1

TDA2822 IC Stereo Amplifier Circuit

TDA2822 IC integrated into stereo mode is shown in below figure. The input of the left channel is given to the pin1 that is the noninverting input of the first built-in amplifier phase and the input of the right channel given to pin16 that is the noninverting input of the second built-in amplifier.

Amplifier Circuit in Stereo Mode using TDA2822
Amplifier Circuit in Stereo Mode using TDA2822

The pin1 of these built-in amplifiers are connected to GND terminal with separate C5&C6 (1000uF) capacitors. The left and right amplified outputs are available at pins 6 &11 of the IC. The outputs are fixed to the related speakers using capacitors like C1 & C2 correspondingly.

The 4.7-ohm resistor and 0.1uF capacitor branch linked across speakers which are intended for progressing high-frequency strength and stopping oscillations. Here, capacitor C7 is the power supply filter capacitor.

TDA2822 Amplifier Circuit In Bridge Mode

The TDA2822 amplifier output power can be improved by using it in this mode using the bridge arrangement and it is shown in below figure. The input of the audio is given to the noninverting input (pin1) of the primary built-in amplifier. The non-inverting input of the next built-in amplifier is given to GND terminal. The inverting i/p of these amplifiers are connected to GND with the help of capacitor branches like C9, C11. The Branches like the R6, C10, and R5, C8 are intended for progressing higher frequency stability and stopping oscillations. Here, C12 Capacitor is used to filter the power supply.

TDA2822 Amplifier Circuit In Bridge Mode
TDA2822 Amplifier Circuit In Bridge Mode

Stereo Amplifier Circuit with PCB Layout

A PCB layout and its components layout of the stereo amplifier circuit using TDA2822M is shown in the below figure. After connecting the circuit, surround it in an appropriate box. Fix VR1 & VR2 potentiometers on the front board of the box intended for controlling the volume of left and right, respectively. On the printed circuit board, utilize an 8-pin IC socket for TDA2822M so that you can simply take away the IC throughout troubleshooting.

PCB Layout of Stereo Amplifier using TDA2822
PCB Layout of Stereo Amplifier using TDA2822
Components Layout for the PCB
Components Layout for the PCB

Thus, this is all about stereo amplifier circuit using TDA2822 with PCB layout. We hope that you have got a better understanding of this concept. Furthermore, any doubts regarding this concept or to implement any electrical or electronic projects, please give your valuable suggestions by commenting in the comment section below. Here is a question for you, what is the function of the TDA2822 amplifier?

Add Comment