PAM8403 Filterless 3w Class-D Stereo Audio Amplifier IC SOP-16

PAM8403 Filterless 3W Class-D Stereo Audio Amplifier IC (SOP-16) delivers high-efficiency stereo sound amplification without external filters. This compact IC powers portable speakers, gaming headsets, and multimedia devices with crisp audio output while minimizing power consumption.

Key Features:

• Filterless Design: Eliminates the need for external LC filters, reducing component count and cost.
• 3W Stereo Output: Drives 4Ω speakers at 3W per channel (5V supply) for robust sound.
• Class-D Efficiency: Achieves up to 90% efficiency, extending battery life in portable devices.
• Wide Voltage Range: Operates from 2.5V to 5.5V, compatible with Li-ion and USB power sources.
• Low Quiescent Current: Draws only 10mA in standby mode to conserve energy.

Technical Specifications:

• Output Power: 3W x 2 (4Ω, 5V) / 1.5W x 2 (8Ω, 5V)
• THD+N: <10% (3W, 4Ω)
• Signal-to-Noise Ratio (SNR): ≥70dB
• Operating Voltage: 2.5V–5.5V DC
• Shutdown Current: <1µA

Mechanical Specifications:

• Package Type: SOP-16 (Surface Mount)
• Lead Material: Lead-free, RoHS-compliant
• Thermal Resistance: 50°C/W (Junction-to-Ambient)

Dimensions:

• Package Size: 9.9mm × 3.9mm × 1.25mm (L×W×H)
• Pin Pitch: 0.65mm

Pinout and Wiring:

• Pin 1 (SD): Shutdown control (active low)
• Pin 2–3 (LIN/RIN): Left/Right audio inputs
• Pin 4–5 (GND): Ground connections
• Pin 6–9 (LO+/LO–, RO+/RO–): Differential speaker outputs
• Pin 10 (VDD): Power supply (2.5V–5.5V)
• Connect speakers between LO+/LO– and RO+/RO– pins for stereo output.

Datasheet Reference:

• Search “PAM8403 datasheet” for detailed schematics, PCB layout guidelines, and performance graphs.

Applications:

• Portable Bluetooth Speakers: Provides efficient amplification for battery-powered designs.
• Laptop/Tablet Audio Boosters: Enhances built-in speaker volume.
• Toys and Gadgets: Drives small speakers with minimal power drain.
• DIY Audio Projects: Simplifies stereo amplifier circuits for hobbyists.

Equivalent Models:

• PAM8406: Higher-power (6W) variant with similar features.
• TPA2012: Filterless Class-D amplifier with I2C control.

Package Includes:

• 1 x PAM8403 Filterless 3W Class-D Stereo Audio Amplifier IC (SOP-16)