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

The PAM8403 Filterless 3W Class-D Stereo Audio Amplifier IC is a compact and efficient audio amplifier chip ideal for portable and embedded audio applications. Operating with a 2.5V–5.5V power supply, it delivers 3W per channel into 4Ω speakers without requiring external LC filters, making it ideal for space-constrained designs. Its low THD and EMI make it suitable for DIY audio projects, Bluetooth speakers, and microcontroller-driven audio systems.

Key Features of PAM8403 Filterless 3W Class-D Stereo Audio Amplifier IC:

• Filterless Architecture: No need for external output filtering components.
• Low THD+N: Less than 10% at 3W output for better audio fidelity.
• High Efficiency: Up to 90% power efficiency reduces heat generation.
• Low Quiescent Current: Enables longer battery life in portable devices.
• Short-Circuit and Thermal Protection: Built-in safety features.

Technical Specifications of PAM8403 Filterless 3W Class-D Stereo Audio Amplifier IC:

• Operating Voltage Range: 2.5V to 5.5V
• Output Power: 3W per channel at 5V into 4Ω load
• Efficiency: Up to 90%
• Total Harmonic Distortion (THD+N): < 10% @ 1KHz, 3W output
• Quiescent Current: 4mA (typical)
• Shutdown Current: 0.6µA (typical)
• Input Impedance: 15KΩ (typical)

Mechanical Specifications of PAM8403 Filterless 3W Class-D Stereo Audio Amplifier IC:

• Package Type: SOP-16 (Small Outline Package)
• Pin Count: 16 Pins
• Package Material: Plastic with lead frame
• Mounting Type: SMD (Surface Mount Device)

Dimensions:

• Length: 10.2mm
• Width: 5.4mm
• Height: 1.5mm
• Pin Pitch: 1.27mm

Mounting Options:

• Surface Mount: For direct soldering onto PCBs using SMD processes.

Schematic Diagram, Connection, Wiring and Pinout of PAM8403:

• Left Channel Input: INL (Pin 3)
• Right Channel Input: INR (Pin 14)
• Left Output: OUTL+ (Pin 8), OUTL− (Pin 7)
• Right Output: OUTR+ (Pin 11), OUTR− (Pin 10)
• VDD: Pin 13 (Connect to 5V Power Supply)
• GND: Pins 5, 6, 9, 12
• SHDN: Pin 1 (Shutdown control, active low)

Datasheet of PAM8403 Filterless 3W Class-D Stereo Audio Amplifier IC:

• Download PAM8403 Datasheet (PDF)

Applications of PAM8403 Filterless 3W Class-D Stereo Audio Amplifier IC:

• Bluetooth Speakers: Compact audio amplifiers in portable wireless speakers.
• DIY Audio Projects: Ideal for hobbyist audio amplifier builds.
• Microcontroller Audio Output: Compatible with Arduino, ESP32, Raspberry Pi, etc.
• MP3 Players: Integrated in low-power audio playback devices.
• Intercom and Voice Devices: Clear audio amplification in embedded systems.

Equivalent of PAM8403 Filterless 3W Class-D Stereo Audio Amplifier IC:

• TPA2013D1: Texas Instruments alternative with similar features
• MAX98306: Stereo class-D amplifier for portable devices
• NS8002: Mono amplifier with similar voltage range

Package Includes:

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