I2S Class-D Amplifier Module (MAX98357) — 6-Pack (Concise English Description) Compact, plug-and-play I2S Class-D amplifier modules based on the MAX98357. Accepts standard I2S digital audio (DIN / BCLK / LRC) and directly drives a speaker—no separate DAC or amplifier required. Ideal for Raspberry Pi, ESP32, Arduino (with I2S), portable projects and small smart speakers. Key Features Chip: MAX98357 (I2S Class-D) Supply: DC 2.5–5.5V (recommended 5V) Output power (5V, 10% THD): ≈ 3.2 W @ 4Ω, 1.8 W @ 8Ω Formats: I2S / 12S / LJ / TDM; sample rates 8–96 kHz No external MCLK required; built-in click/pop suppression Selectable gains: 3 / 6 / 9 / 12 / 15 dB via GAIN pin Default output: L+R mono mix; SD/MODE selects shutdown or left/right channel Bridge-Tied (BTL) outputs — drives speakers directly; integrated thermal & over-current protection PSRR: ~77 dB (1 kHz). Weight: ~5 g per board. Pinout (quick) VCC — power in (2.5–5.5V) GND — ground DIN — I2S data in BCLK — bit clock LRC — left/right (LRCLK) or TDM sync SD / MODE — shutdown / channel select (pull LOW = shutdown) GAIN — set gain with pull-up / pull-down or direct wiring Usage & Precautions Outputs are PWM BTL — connect only to a speaker. Do not tie outputs to ground or feed into another amplifier input. Ensure ventilation; high continuous power increases temperature. Add heatsinking if needed. Use a stable power supply to avoid noise or triggering protection. Wire with power off; test first at low gain. Recommended for small speakers (4–8Ω). Avoid long continuous periods at maximum power. Package Contents 6 × MAX98357 I2S Class-D amplifier modules 1 × Male-to-Female Dupont jumper wire 1 × Female-to-Female Dupont jumper wire

• Plug and Play: Compact WLP design reduces parts and PCB size; digital input improves noise immunity and ~8 dB jitter tolerance with improved jitter tolerance (~8 dB); built-in EMI suppression supports longer speaker runs without extra filtering — high-quality sound with minimal components and efficient Class-D performance.
• DIY & Maker Friendly: Ideal for hobbyists, students, and developers creating custom audio projects. Works seamlessly with Arduino, Raspberry Pi, ESP32 and other MCUs. Perfect for portable speakers, 3D-printed enclosures, and wearable devices. Includes Dupont cables for easy. Compact design with digital input delivers reliable Class-D performance for DIY audio and learning projects.

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