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PAM8403 Mini Digital Amplifier Board - 5V 3W Module

Dual-channel (stereo) Class-D audio amplifier module based on the PAM8043 IC.
Delivers 3W + 3W output power at 4Ω load with 5V supply.
Wide operating voltage range of 2.5V to 5.5V DC, suitable for USB or battery power.
High efficiency (up to 90%) with low power consumption for longer battery life.
Built-in protection features including short-circuit protection and thermal shutdown.

Non-returnable

SKU - YTX25268010

₹65.67

₹75.20

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Product Details

PAM8403 Digital Audio Amplifier Module (3W + 3W Stereo)

The PAM8403 Digital Audio Amplifier Module is a compact, high-efficiency, dual-channel Class-D audio amplifier designed for portable and low-power audio applications. Based on the reliable PAM8403 IC, this module delivers up to 3W per channel (6W total stereo output) while maintaining excellent sound quality with low distortion.

Thanks to its Class-D architecture, the amplifier achieves efficiency levels of up to 90%, making it ideal for battery-powered devices such as portable speakers, Bluetooth audio systems, and USB-powered projects. The filterless output design eliminates the need for bulky external LC filters, reducing component count, cost, and PCB space.

The module operates reliably from a 2.5V to 5.5V DC supply, allowing it to be powered directly from USB ports, power banks, or single-cell lithium batteries. Built-in safety features such as short-circuit protection and thermal shutdown (OTP) ensure stable and safe operation.

🔌 Module Pinout and Features

Power Input: VCC (2.5V–5.5V) and GND. A stable 5V supply is recommended for maximum output.
Audio Input: INL (Left), INR (Right), and GND for stereo audio signal input.
Speaker Output: LO+ / LO− (Left Channel) and RO+ / RO− (Right Channel) differential outputs.
Gain: Fixed internal gain, typically around 24 dB.
Volume Control: Many variants include an onboard rotary potentiometer for convenient volume adjustment.

💡 Applications

Portable USB-powered mini speakers.
DIY Bluetooth speakers and MP3 audio players.
Audio enhancement for monitors, TVs, and projectors.
Adding sound output to Arduino, Raspberry Pi, and embedded projects.

⚙️ Technical Specifications

Amplifier IC	PAM8403
Amplifier Class	Class-D
Channels	2 (Stereo)
Output Power	3W + 3W (Max at 4Ω, 5V)
Operating Voltage	2.5V – 5.5V DC
Efficiency	Up to 90%
Load Impedance	4Ω / 8Ω Speakers
Protection Features	Short-Circuit Protection, Thermal Shutdown (OTP)
HSN Code	85184000