PAM8403 3W Stereo Audio Amp

Description

PAM8403 Mini Digital Audio Amplifier Module – 2×3W, 5 V DC (Mono/Stereo Applications) Description: Ultra-compact Class‑D stereo amplifier module using the PAM8403 IC. Operates from a 5 V rail and delivers up to 3 W per channel. Ideal for portable or microcontroller-based DIY audio projects needing efficient and clear sound. Key Features: Dual-channel stereo amplifier: 3 W + 3 W output (with 4 Ω speakers at 5 V) Operates on 2.5 V to 5.5 V DC (best at 5 V) Supports 4 Ω to 8 Ω speaker loads High overall efficiency (around 85–90 %) with minimal output filtering required Filter‑less architecture: no external LC low‑pass is needed for speaker interface Built-in protections: short-circuit, thermal shutdown (~140 °C), under-voltage lockout Technical Specifications: Feature Specification Amplifier IC PAM8403 (Class‑D) Gain Fixed (max 24 dB, ~200 × gain) Operating Voltage 2.5 V – 5.5 V DC (optimal at 5 V) Output Power Up to 3 W × 2 channels (at 4 Ω, 5 V) Supported Speaker Load 4 Ω – 8 Ω Efficiency ~85–90 % Protections Short-circuit, under-voltage lockout, thermal shutdown Frequency Response Broad bandwidth, typically >300 kHz capability Board Dimensions ~29.5 * 20.2 * 15mm (length × width × thickness) Net Weight ~1 g Usage Notes: Provide a stable 5 V DC supply capable of supplying at least 500 mA for both channels. Use 4 Ω speakers for maximum output and volume; 8 Ω speakers reduce power output. Avoid input signal voltages above approx. 0.4 V peak-to-peak to prevent clipping. Ensure co