{"title":"Adafruit Mono 2.5W Class D Audio Amplifier - PAM8302","handle":"adafruit-mono-2-5w-class-d-audio-amplifier-pam8302","url":"/products/adafruit-mono-2-5w-class-d-audio-amplifier-pam8302","description":"The Adafruit Mono 2.5W Class D Audio Amplifier delivers powerful sound from a tiny package. Based on the PAM8302 chip, it drives 4–8 ohm speakers at up to 2.5 W with over 90% efficiency — making it ideal for portable and battery-powered audio projects. A significant upgrade over basic LM386-based amplifiers.\n\nThe amplifier runs from 2.0–5.5 V DC and includes built-in thermal and over-current protection. An on-board trim pot lets you adjust volume down from the default 24 dB gain. The differential inputs pass through 1.0 µF coupling capacitors, and the bridge-tied output connects directly to the speaker — no connection to ground required.\n\nKey Features\n\n\n2.5 W Output – Into 4 Ω at 10% THD; 1.5 W into 8 Ω (at 5.5 V supply)\n\nClass D Efficiency – Over 90% efficient at 8 Ω, half-watt load\n\nWide Supply Range – 2.0–5.5 V DC, perfect for battery power\n\nVolume Trim Pot – Adjustable from the fixed 24 dB gain\n\nDifferential Inputs – AC-coupled via 1.0 µF capacitors; tie A− to ground for single-ended sources\n\nBridge-Tied Output – Drives speakers directly; not designed to feed another amplifier\n\nBuilt-In Protection – Thermal shutdown and short-circuit/over-current protection\n\nLow Power Draw – 4 mA quiescent, 1 µA in shutdown mode\n\nFilterless Design – Ferrite bead + capacitors on output; 50 dB PSRR at 1 kHz\n\n\nIdeal For\n\nPortable and battery-powered audio projects\nAdding sound output to microcontroller projects\nAlarm and notification systems\nInteractive exhibits and installations\n\n\nPackage Contents\n\n1× Adafruit PAM8302 Mono Class D Amplifier Breakout (assembled and tested)\n1× Header strip\n1× 3.5 mm screw terminal block (colour may vary)\n\n\n\nNote: Speaker not included. Use any speaker with 4 Ω or greater impedance. The bridge-tied output should drive speakers directly — do not connect the output to another amplifier.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":9074,"title":"Default Title","sku":"AF-2130","price":8.41,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":3,"option1":"Default Title"}]}