TDA2822M Low Voltage Stereo Audio Amplifier IC

Specification	Details
Supply Voltage Range ($V_s$)	1.8V to 15V DC
Output Power (Stereo)	1W + 1W (at 9V, 4$\Omega$ load)
Output Power (Bridge/BTL)	2W (at 9V, 8$\Omega$ load)
Quiescent Drain Current	6mA to 9mA (Typical)
Package Type	DIP-8 (Through-Hole)
Operating Temperature	-20°C to +85°C
Input Resistance	100 k$\Omega$

Price

₹ 29.66

(Tax included)

Barcode: 01347

Product Description

The TDA2822M Audio IC is a versatile "workhorse" for small-scale sound amplification. It features two independent high-gain amplifiers inside a single chip. In Stereo Mode, it drives two separate speakers (Left and Right), making it ideal for headphone amplifiers or portable mini-speakers. In Bridge Mode (BTL), the two internal amplifiers work together to drive a single speaker with significantly higher power output. Its ability to function at voltages as low as $1.8V$ means it can run effectively on two AA batteries or a single Lithium-ion cell, providing a punchy audio response without the need for complex heat-sinking.

Key Features

Ultra-Low Voltage Operation: Functions down to $1.8V$, ideal for compact battery-operated devices.
Low Distortion: Clear audio reproduction with minimal crossover interference.
Flexible Configuration: Can be wired for Stereo (Dual Channel) or Bridge (Mono) output.
Minimal External Parts: Requires only a few capacitors and resistors to create a complete amplifier circuit.
Thermal Protection: Built-in safeguards to prevent damage from overheating during prolonged use.

Technical Details

Pinout (DIP-8): 1. Output 1, 2. VCC, 3. Output 2, 4. GND, 5. Input (-) 2, 6. Input (+) 2, 7. Input (+) 1, 8. Input (-) 1.
Gain: Fixed internally for stability and ease of design.

Prototyping and Engineering Tips from Robogears

The DC Blocking Capacitors: Always use electrolytic capacitors (typically $220\mu F$ to $470\mu F$) on the output pins (Pins 1 and 3) before the speakers. These block DC voltage from reaching your speakers, preventing "popping" sounds and protecting the speaker voice coils from burning out.
Bridge Mode for Extra Power: If you only need one speaker but want it louder, use the Bridge-Tied Load (BTL) configuration. This doubles the voltage swing across the speaker, theoretically quadrupling the power output compared to a single-ended setup at the same voltage.
Power Supply Decoupling: To prevent high-frequency oscillations or "humming," place a $100\mu F$ electrolytic capacitor and a $0.1\mu F$ ceramic capacitor as close as possible to Pin 2 (VCC) and Pin 4 (GND).
Volume Control: Use a $10k\Omega$ or $50k\Omega$ Logarithmic (Audio Taper) potentiometer at the inputs to control the volume smoothly without overloading the preamp stage.

Package Includes

1 x TDA2822M Dual Low-Voltage Power Amplifier IC (DIP-8)

Disclaimer

Do not exceed the $15V$ maximum supply voltage, as this will result in immediate IC failure. When operating at higher voltages ($>9V$) with low-impedance speakers ($4\Omega$), the chip may get warm; ensure the circuit board has sufficient copper traces to help dissipate heat.