What is TDA2822 Audio Amplifier IC? Pin Diagram and Circuit
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The TDA2822 is a low voltage dual audio power amplifier designed for portable audio devices, toys, radios, and multimedia speakers. It supports stereo as well as bridge amplifier configurations while requiring only a few external components.
Key features of TDA2822
The TDA2822D is a monolithic audio amplifier housed in an 8-pin SOIC package. It is specifically tailored for low voltage portable audio applications.
- Low Voltage Operation: Functions on supply voltages as low as 1.8V (up to 15V).
- Low Distortion: Features minimal crossover distortion for clear audio output.
- Low Quiescent Current: Preserves battery life when no audio is playing.
- Flexible Output: Can be wired in a standard stereo configuration or a Bridge-Tied Load (BTL) configuration to push more power to a single speaker.
TDA2822 Pin Diagram
TDA2822D (Dual Low Voltage Power Amplifier)
| Pin # | Pin Name | Description |
|---|---|---|
| 1 | OUTPUT (1) | Output for Channel 1 |
| 2 | SUPPLY VOLTAGE | Positive power supply |
| 3 | OUTPUT (2) | Output for Channel 2 |
| 4 | GROUND | Ground connection |
| 5 | INPUT - (2) | Inverting input for Channel 2 |
| 6 | INPUT + (2) | Non-inverting input for Channel 2 |
| 7 | INPUT + (1) | Non-inverting input for Channel 1 |
| 8 | INPUT - (1) | Inverting input for Channel 1 |
Example Use Case
DIY Portable Speaker: You can build a compact, battery-powered speaker using the TDA2822D configured in bridge mode (BTL). Running off just two standard AA batteries (3V), the IC takes an audio signal from a smartphone’s headphone jack and amplifies it to drive an 8-ohm mini speaker, producing surprisingly loud and clear audio for a low-voltage supply.
Applications of TDA2822
Portable cassette players, pocket radios, CD players, and low-power headphone amplifiers.
Summary
TDA2822 provides cost-effective audio amplification for battery-operated and portable electronic products.