MD8002D 3W Mono Audio Power Amplifier IC SOIC-8

MD8002D 3W Mono Audio Power Amplifier IC SOIC-8 is a highly efficient, Class AB audio power amplifier specifically engineered to deliver up to 3W of continuous output power into a 3Ω load. This compact integrated circuit utilizes a minimum number of external components, drastically simplifying circuit design and minimizing overall system cost. Consequently, it is an ideal solution for battery-powered or portable electronic devices that require robust audio output without high power consumption. The MD8002D features a shutdown control pin, which offers exceptional power-saving capability. Furthermore, its low quiescent current and minimal total harmonic distortion ensure that your portable devices produce clear, high-quality mono sound output. Therefore, designers frequently select this amplifier for consumer electronics where space and energy efficiency are critical requirements.

Key Features:

• High Output Power: Capable of delivering a minimum of 3W into a 3Ω load (V_DD = 5V) or 2.6W into a 4Ω load, providing powerful sound for its size.
• Low Quiescent Current (I_Q): Designed for battery-powered operation, it features very low standby and shutdown current, maximizing battery life.
• Shutdown Control: Includes an active-low shutdown pin that reduces the supply current to microampere levels, achieving deep power saving.
• Gain Setting: External resistor feedback allows you to configure the closed-loop gain easily, offering flexibility for different input signal levels.
• Protection Circuitry: Built-in thermal shutdown and short-circuit protection safeguards the device against operational faults and overheating.

Technical Specifications:

• Output Power (P_OUT): 3W (min) at V_DD=5V, R_L=3Ω, THD ≤ 10%
• Minimum Operating Voltage (V_DD): 2.0 V
• Maximum Operating Voltage (V_DD): 5.5 V
• Load Impedance (R_L): 3 Ω to 8 Ω
• Total Harmonic Distortion + Noise (THD+N): Typically 0.15% (at 1W, 1kHz, 4Ω)
• Quiescent Current (I_Q): Typically 6.5 mA (V_DD = 5V, V_IN = 0V)
• Shutdown Current: Moreover, the shutdown current is typically less than 1 μA.

Mechanical Specifications:

• Package Type: SOIC-8 (SOP-8) Surface Mount Technology (SMT)
• Pin Count: 8 Pins
• Thermal Resistance (Θ_JA): Designed to handle heat efficiently in a compact package.
• Lead Finish: Lead-free (Pb-free) plating.

Dimensions:

• Body Length: ≈ 4.9 mm
• Body Width: ≈ 3.9 mm
• Pitch (Pin Spacing): 1.27 mm (0.05 in)
• Height: ≈ 1.4 mm

Pinout and Wiring:

• Pin 1 (SHDN): Shutdown (Active Low). Pulling this pin to GND enables the power-saving mode.
• Pin 2 (BYPASS): Connect a capacitor here to the ground. This filters the supply voltage ripple and reduces noise.
• Pin 3 (IN+): Non-inverting Input. Connect this pin to the audio signal source.
• Pin 4 (IN-): Inverting Input. Connect this pin to the feedback network for gain control.
• Pin 5 (V_DD): Positive Power Supply Input (2.0V to 5.5V).
• Pin 6 (GND): Ground reference pin.
• Pin 7 (OUT+): Speaker Output Positive.
• Pin 8 (OUT-): Speaker Output Negative.
• Wiring Note: This amplifier operates in a Bridge-Tied Load (BTL) configuration, meaning neither output pin (OUT+ or OUT-) connects directly to ground.

Datasheet Reference:

• Download MD8002D 3W Mono Amplifier Datasheet

Commonly Used in:

• Portable Media Players: Driving internal mini-speakers or headphone outputs efficiently.
• Electronic Toys: Providing the audio output for sound effects and voice playback.
• Handheld Gaming Devices: Offering clear sound in a compact, low-power footprint.

Applications:

• Battery-Powered Speakers: Forming the core amplification stage for small, rechargeable Bluetooth speakers.
• Voice Alert Systems: Used in security systems, smart locks, or medical devices for vocal notifications.
• USB Sound Cards: Providing low-power audio output functionality for PC peripherals.

Equivalent Models:

• LM4871 (Texas Instruments): A functionally similar 3W BTL audio amplifier, however, it may feature slightly different current consumption specifications.
• PAM8403 (D-Class): While not a direct Class AB equivalent, the PAM8403 is a popular, high-efficiency D-Class substitute often used in similar 3W applications.
• TDA1308 (NXP): A headphone amplifier counterpart, but the MD8002D is better suited for direct speaker driving.

Package Includes:

• 1 x MD8002D 3W Mono Audio Power Amplifier IC SOIC-8