PAM8403 Audio Amplifier Module

PAM8403 Audio Amplifier With Volume Control The PAM8403 Audio Amplifier with Volume Control is a compact, high-efficiency stereo amplifier module designed for portable and embedded audio applications. It is built around the PAM8403 Class D amplifier chip, capable of delivering up to 3W per channel into 4Ω speakers at a 5V supply. The module features an integrated volume control potentiometer, which allows users to adjust audio levels easily and, in some designs, serves as a power switch when turned fully counter-clockwise. Operating within a voltage range of 2.5V to 5.5V, the module is well-suited for battery-powered devices, DIY audio projects, and smart electronics requiring high-quality sound in a small footprint. Its filter less design and built-in protections make it a reliable choice for various applications. Features: • High Efficiency Up to 90% efficiency with low quiescent current. • Filterless Design Directly drives speakers without LC filters. • Volume Control Integrated potentiometer for easy audio level adjustment. • Wide Voltage Range Operates at 2.5V–5.5V Dc. • Protection Features Short-circuit and thermal shutdown protection. Specifications: Parameter: Value Operating Voltage: 2.5V to 5.5V Output Power: 3W per channel into 4Ω at 5V Efficiency: Up to 90% Speaker Impedance: 4Ω to 8Ω Dimensions: 29mm x 20mm x 16mm (including potentiometer) Weight: Approximately 5g (varies by manufacturer) Amplifier Type: Class D Total Harmonic Distortion + Noise (THD+N): Low, ensuring high-quality audio Protection Features: Short-circuit, thermal, under-voltage lockout Note: • Input audio should be via shielded wire for best performance. • Use a proper filtered power supply with good filter capacitors. • Take care not to short speaker wires else IC will get damaged. • Make sure the power supply never exceeds 5.5V else IC will get damaged. Use a regulated power supply. Pin Configuration: Pin/Terminal: Description VCC: Power supply positive (2.5V to 5.5V) GND: Ground IN_L: Left channel audio input IN_R: Right channel audio input OUT_L+: Left channel speaker positive OUT_L-: Left channel speaker negative OUT_R+: Right channel speaker positive OUT_R-: Right channel speaker negative Package Includes: • 1 x PAM8403 Audio Amplifier Module with Volume Control. Data Sheet: PAM8403

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 correct polarity; reverse voltage can damage the IC. Thermal protection will shut down the amplifier if internal die temperature exceeds ~140 °C. Outputs cannot be combined (tie negative channels together), as this may damage the board.

PAM8403 Audio Amplifier Module The PAM8403 is a 2-channel, 3W, class-D audio amplifier module ? that features low harmonic distortion and high efficiency. It offers low THD+N, allowing it to achieve high-quality sound reproduction. Operating voltage for this module range from 2.5 V to 5.5 V, making it ideal for adding the audio capability to your MP3 and MP4 player projects. Specifications: Operating Voltage: Wide power supply ranges from 2.5V to 5.5V DC Dual-channel stereo with high output power (3W+3W Output at 10% THD with a 4? Load @5v DC) Max Gain 24 dB. Filterless architecture Low Quiescent Current and Low EMI Operating Temperature: -40 to +85?C Short Circuit Protection Thermal Shutdown Superior Low Noise Efficiency up to 90% Dimensions: 21x 18 x 3mm (LxWxH) Package Includes: 1x PAM8403 Audio Amplifier Module Product Datasheet: PAM 8403 Datasheet Related Products: Modules