MAX98357 I2S 3W Class D Amplifier Audio Decoder Module

MAX98357 I2S 3W Class D Amplifier Audio Decoder Module

The MAX98357 Audio Decoder Module is a compact, high-efficiency solution for adding crystal-clear sound to any project with a digital audio stream. Based on the Maxim Integrated MAX98357A IC, this amplifier is unique because it accepts raw I2S (Inter-IC Sound) digital audio data directly from microcontrollers like the ESP32, Raspberry Pi, or Arduino (with I2S libraries). This process entirely bypasses the need for an external Digital-to-Analog Converter (DAC), significantly simplifying the audio signal chain.

As a Class D amplifier, the MAX98357 operates with exceptional efficiency (up to 92%), minimizing power consumption and heat generation while delivering a robust 3W of power into a 4-ohm speaker. This feature is critical for battery-powered or portable audio devices where power budget and thermal management are key concerns. The module is fully protected against short-circuit events and thermal overload, ensuring reliable long-term performance.

🔧 Key Features  

• Amplifier Class: Class D (High Efficiency, Low Heat).
   
• Input Interface: I2S (Inter-IC Sound) Digital Audio Protocol.
   
• Output Power: 3W (at 4Ω load and 5V supply).
   
• Power Supply: Single supply, 2.7V to 5.5V DC.
   
• Compatibility: Works seamlessly with 3.3V and 5V logic systems.
 
• Protection: Thermal Foldback and Short-Circuit Protection (SC Protection).
 

💡 Applications

• Adding high-quality audio to ESP32 and Raspberry Pi projects.
   
• Wearable and Portable audio devices (Digital Audio Players).
 
• Voice prompt systems, smart speakers, and automated announcement systems.
 
• Digital audio output for small desktop monitors or gaming devices.
 

⚙️ Technical Specifications Summary

📦 Package Includes   

• 1 × MAX98357 I2S 3W Class D Amplifier Audio Decoder Module