Sign In SHOP BLOG LEARN FORUMS 0 Items VIDEOS BREAKOUT BOARDS / AMPLIFIERS/SOUND / ADAFRUIT MONO 2.5W CLASS D AUDIO AMPLIFIER - PAM8302 Adafruit Mono 2.5W Class D Audio Amplifier - PAM8302 PRODUCT ID: 2130 IN STOCK ADD TO CART 1 1-9 10-99 100+ ADD TO WISHLIST DESCRIPTION TECHNICAL DETAILS DESCRIPTION This super small mono amplifier is surprisingly powerful - able to deliver up to 2.5 Watts into 48 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.0V-5.5VDC. Since the amp is a class D, its very efficient (over 90% efficient when driving an 8 speaker at over half a Watt) - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but we could barely tell it got hot. There's even a volume trim pot so you can adjust the volume on the board down from the default 24dB gain. This board is a welcome upgrade to basic "LM386" amps! The A+ and A- inputs of the amplifier go through 1.0uF capacitors, so they are fully 'differential' if you don't have differential outputs, simply tie the Audio- pin to ground. The output is "Bridge Tied" - that means the output pins connect directly to the speaker pins, no connection to ground. The output is a high frequency 250KHz square wave PWM that is then 'averaged out' by the speaker coil - the high frequencies are not heard. All the above means that you can't connect the output into another amplifier, it should drive the speakers directly. Comes with a fully assembled and tested breakout board. We also include header to plug it into a breadboard and a 3.5mm screw-terminal blocks so you can easily attach/detach your speaker. You will be ready to rock in 15 minutes! Speaker is not included, use any 4 ohm or greater impedance speaker. Output Power: 2.5W at 4, 10% THD, 1.5W at 8, 10% THD, with 5.5V Supply 50dB PSRR at 1KHz Filterless design, with ferrite bead + capacitors on output. Fixed 24dB gain, onboard trim potentiometer for adjusting input volume. Thermal and short-circuit/over-current protection Low current draw: 4mA quiescent and 1uA in shutdown mode Note: The terminal block included with your product may be blue or black. TECHNICAL DETAILS PAM8302A datasheet EagleCAD PCB files on GitHub Fritzing object available in Adafruit Fritzing library Dimensions (without 0.1" header): 15mm x 24mm x 2mm / 0.6" x 0.9" x 0.08" Weight: 1.4g LEARN PiGlass Build a Raspberry Pi based wearable computer Ray Gun Blaster Make a prop replica with sound FX and NeoPixel LEDs! CircuitPython Sound Box Press the button to play sound! Wizzy: A Needle Felted Cat Create animatronic animals with attitude. Cup o' Sound Cafe White Noise Machine Pocket PiGRRL Retropie in your pocket! Mini Raspberry Pi Handheld Notebook Build a tiny handheld raspberry pi portable computer 5" Display Kippah Portable Raspberry Pi Make a portable Raspberry Pi Talking d20 20-Sided Gaming Die "Greetings, adventurer!" 10" Raspberry Pi Desktop Slim and portable! Phone-Activated Talking Dog Collar "I can smell you!" PiGRRL 2 Make a portable Raspberry Pi 2 game console Raspberry Pi Pipboy 3000 Explore the apocalypse with a trusty Pi Happy Chewbacca Mask Chewbacca is a lovable Wookie with a distinctive voice, but here's how to give him a voice transplant and add your own fun sounds to this talking mask Circuit Playground SoundControlled Robot Make your Circuit Playground mobile and change direction via sound Fix-It Felix Jr. Hammer with Sound FX I can make it! Magic Wand A Magic Wand responds to movement to cast spells Raspberry Pi Selfie Bot Build a selfie camera with a quirky personality! MAY WE ALSO SUGGEST... Adafruit Audio FX Sound Board - WAV/OGG Trigger Adafruit I2S Stereo Decoder - UDA1334A Breakout Adafruit I2S 3W Class D Amplifier Breakout - Adafruit Audio FX Sound Board - WAV/OGG Trigger Mono Enclosed Speaker 3W 4 Ohm Adafruit PDM MEMS Microphone Breakout Adafruit Audio FX Mini Sound Board - WAV/OGG DISTRIBUTORS CONTACT SUPPORT DISTRIBUTORS Adafruit Audio FX Mini Sound Board - WAV/OGG EXPAND TO SEE DISTRIBUTORS "Perfect is the enemy of good" Voltaire EDUCATORS JOBS FAQ SHIPPING & RETURNS TERMS OF SERVICE PRIVACY & LEGAL ABOUT US ENGINEERED IN NYC Adafruit (R) 4.9