TDA2822 Stereo Amplifier Circuit

Contents hide

1 Introduction

2 Features of TDA2822

3 TDA2822 Specifications

4 Pin Configuration of TDA2822 IC

5 TDA2822 Stereo Amplifier Circuit

6 Application of TDA2822

Introduction

In this Tutorial, we are going to make a “TDA2822 stereo amplifier circuit with PCB & datasheet”. A dual low-power audio amplifier called the TDA2822 is housed in an 8-Pin plastic dual in-line box. Having Low crossover distortion, a low quiescent current, and a supply voltage range of 3V to 15V are just a few of the qualities that this IC has to offer. It has two Op-Amps, which are typically used for audio amplification due to their broad bandwidth gain. And, 250 milliwatts of output power can be delivered by the two outputs.

Features of TDA2822

Low noise and low distortion circuitry
Small Size (8-pin dip package)
Only a few external components required
Contains dual low voltage power amplifies (Built for Stereo Amplification)
Can also be used in BTL mode
Low-cost and reliable

TDA2822 Specifications

Supply Voltage: 3-15V
Output Power: 3.2 W
Audio – Load Impedance: 8 Ohms
Gain: 39 dB
Operating Supply Current: 12 mA
Ib – Input Bias Current: 0.1 uA
PSRR – Power Supply Rejection Ratio: 40 dB

Pin Configuration of TDA2822 IC

Pin Number	Pin Name
1, 3	Output
5, 8	IN-
6, 7	IN+
4	Vcc-
2	Vcc+

Pins Description

Output: Provides the amplified audio
IN-: Inverting input, normally remain grounded
IN+: Noninverting input, where the audio signal is given
Vcc-: Needs to connect to the negative supply
Vcc+: Needs to connect with positive supply rail

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TDA2822 Stereo Amplifier Circuit

Since we have briefly discussed the TDA2822, now let’s make a simple Stereo Amplifier Circuit using this IC.

Hardware Required

S.no	Component	Value	Qty
1.	IC	TDA2822	1
2.	Resistor	4.7 ohms	2
3.	Capacitor	100uf, 470uf, 0.1uf	3, 2, 2
4.	Speaker	4 ohms	2
5.	Variable Resistor	50K	2

Circuit Diagram

Working Explanation

First, the circuit receives 9V from the power supply. Furthermore, capacitor C3 acts as a filter capacitor to maintain a more constant voltage, when the sound is too erratic. Then, pin 2 of IC1 is a Vcc pin and therefore receives a steady voltage. Additionally, a negative voltage is connected to the circuit’s GND. Both the left and right input signals flow through potentiometers VR1 and VR2. Hence can adjust the music’s volume. capacitors C1 and C2 are there to suppress DC voltage. The signal then successively flows to inputs pins 7, 8, and pin 6. The circuit within the IC operates and increases the audio’s power. Output is coming from pins 1 and 3