XY-SP5W Mini Class-D 5W Digital Audio Amplifier Board

XY-SP5W Mini Class-D 5W Digital Audio Amplifier Board is an ultra-compact, single-channel audio amplification module designed exclusively for low-power, small-scale audio engineering projects. Functioning as a highly efficient Class-D digital amplifier, this miniature board minimizes heat generation while consistently delivering clear, loud audio from a very minimal power source. Consequently, hobbyists frequently select this mono amplifier for integration into handheld devices, electronic toys, and battery-powered voice-prompt systems. It comfortably drives up to 5W of power into a 2Ω to 8Ω load while drawing power from a simple 5V USB connection or a single lithium-ion cell. Furthermore, its shockingly small physical dimensions allow it to literally squeeze into tight enclosures where traditional amplifiers simply cannot fit. Therefore, whether you are building a custom two-way radio or adding sound to a miniature robotics project, this module provides an unbeatable balance of audio punch and spatial efficiency.

Key Features:

• High Efficiency Class-D: Operates as a purely digital amplifier, therefore drawing minimal idle current and extending the operational lifespan of portable batteries.
• Mono 5W Output: Provides a robust, single-channel audio boost capable of easily driving small full-range or miniature speaker cones.
• Ultra-Compact Design: The board’s microscopic footprint allows it to easily integrate into smart home sensor nodes and compact IoT devices without requiring case modifications.
• Shutdown Control Pin: Features a dedicated low-power shutdown terminal, consequently allowing a microcontroller to put the amplifier to sleep when no audio is playing.
• Broad Load Support: Flexibly accommodates a variety of speaker coils ranging from 2Ω all the way up to standard 8Ω impedances.

Technical Specifications:

• Operating Voltage (V_CC): 2.5 V to 5.5 V DC (Strict maximum of 5.5V)
• Maximum Output Power: 5 W (Mono, at 2 Ω load, 5 V supply)
• Supported Speaker Impedance: 2 Ω, 4 Ω, 8 Ω (4 Ω / 3-5W speaker recommended)
• Amplification Class: Class-D digital amplification
• Signal-to-Noise Ratio (SNR): ≈ 85 dB (at VDD=5V, Vorms=1V)
• Required Power Current: ≥ 1.0 A (A 5V/1A or higher power supply is strongly recommended for distortion-free playback)

Mechanical Specifications:

• Board Material: Multi-layer FR4 Fiberglass PCB
• Mounting Features: Devoid of mounting holes due to size limitations; typically secured with double-sided foam tape or hot glue.
• Connection Type: Solder pads for power and input signals, occasionally featuring screw terminals or pads for the speaker output.
• Cooling Requirement: Requires zero external cooling solutions or aluminum heatsinks.
• Weight: ≈ 3.0 grams

Dimensions:

• Board Length: ≈ 15.0 mm
• Board Width: ≈ 12.0 mm
• Board Thickness: ≈ 2.5 mm

Pinout and Wiring:

• VCC / +: Connect exactly to a regulated 5V DC power source. Overvoltage will instantly destroy the IC.
• GND / -: Connect strictly to the common ground of your power supply. However, crossing polarity will immediately burn the chip.
• IN: Solder the mono audio signal wire from your microcontroller, DAC, or sound module here.
• OUT+ / OUT-: Connect these terminals directly across your speaker coil.
• SHUTDOWN (If present): Pulling this pin to logic LOW turns off the amplifier. Leave floating or pull HIGH to keep active.

Datasheet Reference:

• Download XY-SP5W Mini Digital Amplifier Manual / Specs

Commonly Used in:

• Smart Home DIY: Powering voice feedback components inside custom ESP32 or Raspberry Pi smart assistants.
• Model Making: Embedding realistic engine or siren noises inside scale model trains, cars, and RC vehicles.
• Walkie Talkies: Boosting the weak audio receiver output in custom-built short-range radio communicator projects.

Applications:

• Interactive Greetings: Amplifying a recordable sound module inside a greeting card, gift box, or promotional display specifically.
• Instrument Prototyping: Serving as the practice speaker driver for custom-built Arduino MIDI synthesizers.
• Portable Metronomes: Emitting loud, clear timing clicks for battery-operated digital metronomes consequently.

Equivalent Models:

• PAM8302: A nearly identical 2.5W Class-D mono amplifier offering a very similar microscopic footprint.
• PAM8403 (Single Channel Mod): The Stereo 3W Class-D amplifier board, occasionally used with only one channel wired if a true mono amp is unavailable.
• LM386 Module: A classic analog alternative however possessing significantly lower efficiency and a bulkier board size with an onboard potentiometer.

Package Includes:

• 1 x XY-SP5W Mini Class-D 5W Digital Mono Audio Amplifier Board