The MAX98357A I2S 3W Class D Audio Amplifier Breakout Module takes a digital I2S audio stream and turns it directly into amplified sound, skipping the need for a separate DAC. Built around the MAX98357A chip, it drives a small speaker straight from an ESP32, Raspberry Pi, or other I2S-capable microcontroller.
Key features:
- I2S Digital Input: Accepts a standard I2S audio stream directly, with no external DAC or MCLK required.
- Class D Amplification: Delivers up to 3.2W into a 4-ohm speaker with high efficiency and low heat.
- Selectable Gain: Five pin-selectable gain settings from 3dB to 15dB let the output level match the speaker and application.
- Click and Pop Suppression: Built-in circuitry minimizes startup and shutdown audio artifacts.
- Screw Terminal Output: A 2-pin terminal block makes speaker wiring quick and secure without soldering.
- Thermal Protection: Onboard thermal and over-current shutdown protects the amplifier during extended use.
It is a popular choice for voice assistants, IoT audio alerts, and any ESP32 or Raspberry Pi project that needs simple, high-quality amplified sound.
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