TDA2822M Stereo Audio Amplifier IC Low Voltage 1W SOP-8

TDA2822M Stereo Audio Amplifier IC Low Voltage 1W SOP-8 is a monolithic integrated circuit specifically designed to function as a low-voltage, low-power audio amplifier, perfectly suited for portable electronic devices. This chip operates reliably from a single, low voltage supply (down to 1.8 V), making it an excellent choice for battery-powered gadgets like portable radios, cassette players, and toys. Furthermore, the TDA2822M offers either dual channel stereo (up to 450 mW per channel) or a single channel bridge (BTL) configuration (up to 1 W output) for higher power requirements. The SOP-8 surface-mount package ensures you can integrate this powerful yet compact amplifier into miniature circuit designs where space efficiency is paramount. Consequently, manufacturers frequently rely on the TDA2822M to deliver reliable, quality audio output in mass-produced consumer electronics.

Key Features:

• Low Operating Voltage: The IC requires a minimal supply voltage, operating effectively from V_CC as low as 1.8 V up to 15 V, optimizing battery life.
• High Output Power: Delivers up to 450 mW per channel in stereo mode (V_CC = 6V, R_L = 4 Ω) or 1 W in BTL mode (V_CC = 6V, R_L = 8 Ω).
• Dual Configuration: Supports both stereo amplifier operation and mono bridge-tied load (BTL) operation for flexible design needs.
• Minimal External Components: Requires only a few external capacitors, which simplifies the PCB layout and reduces overall component count and cost.
• Built-in Thermal Protection: Includes an internal thermal shutdown circuit, which safeguards the device against excessive operating temperatures, enhancing long-term reliability.

Technical Specifications:

• Supply Voltage Range (V_CC): 1.8 V to 15 V
• Quiescent Current (I_q): Typically 6.5 mA (Low consumption for portable devices)
• Maximum Output Power (P_out): 1 W (BTL, V_CC = 6V, R_L = 8 Ω)
• Total Harmonic Distortion (THD): Typically 0.2% (V_CC = 6V, P_out = 100 mW)
• Voltage Gain (G_v): Typically 39 dB (Set by internal resistors)
• Channel Separation: Typically 28 dB
• Operating Temperature Range: −40°C to +150°C (Junction)

Mechanical Specifications:

• Package Type: SOP-8 (Small Outline Package, Surface Mount Device)
• Material: Plastic Molded Body
• Mounting: Surface Mount Technology (SMT)
• Thermal Resistance ($\Theta_{JA}$): ≈ 165 °C/W

Dimensions:

• Body Length: ≈ 4.9 mm
• Body Width: ≈ 3.9 mm
• Total Height (including leads): ≈ 1.75 mm
• Pin Pitch: 1.27 mm (Standard for SOP-8)
• Weight: < 0.5 g (Ultra lightweight)

Pinout and Wiring:

• Pin 1 (Output 2): Connect to the output of the second channel (Speaker 2).
• Pin 2 (GND): Connect to the circuit ground reference.
• Pin 3 (V_CC): Connect to the positive supply voltage (1.8 V to 15 V).
• Pin 4 (Input 1): Apply the audio input signal for Channel 1 here.
• Pin 5 (Input 2): Apply the audio input signal for Channel 2 here.
• Pin 6 (Output 1): Connect to the output of the first channel (Speaker 1).
• Pin 7 (Output 1 Decoupling): Connect a decoupling capacitor (e.g., 100 μF) between this pin and ground for stable output.
• Pin 8 (Output 2 Decoupling): Connect a decoupling capacitor (e.g., 100 μF) between this pin and ground.
• Wiring Note: Therefore, always follow the recommended BTL or Stereo application circuits shown in the datasheet for optimal performance.

Datasheet Reference:

• Download STMicroelectronics TDA2822M Datasheet

Commonly Used in:

• Portable Audio Devices: The primary choice for small, battery-operated devices requiring built-in speaker drive capabilities.
• Computer Speakers: Frequently utilized in low-cost, compact USB-powered desktop speaker sets.
• Electronic Toys and Gadgets: Provides simple, effective audio amplification for toys, electronic games, and DIY projects.

Applications:

• Mono Speaker Driver (BTL Mode): Drive single speakers requiring up to 1W of power efficiently.
• Stereo Headphone Amplifier: Provide sufficient power to drive standard headphones or earbuds.
• DIY Audio Projects: Ideal for building simple FM radio circuits, intercoms, and audio signal tracers.

Equivalent Models:

• D2822 (Generic): The widely available generic part number often used interchangeably with the TDA2822M, offering comparable performance.
• LM386 (National/TI): A very common low-power audio amp, however, it is typically a mono amplifier and requires a higher external component count than the TDA2822M.
• MC34119 (Onsemi): A low-power, push-pull phone amplifier that can function in similar low-voltage audio circuits, consequently, serving as a viable alternative in some designs.

Package Includes:

• 1 x TDA2822M Stereo Audio Amplifier IC SOP-8