DC 3V–5V Class AB Mono 3W Mini Audio Amplifier Board Module
DC 3V–5V Class AB Mono 3W Mini Audio Amplifier Board Module
DC 3V–5V Class AB Mono 3W Mini Audio Amplifier Board
Take your DIY audio projects to the next level with this compact, high-efficiency Class AB Mono 3W Mini Audio Amplifier Board. Built around the NS8002 power amplifier chip, this single-channel module delivers clean, interference-free sound output in a tiny SMT form factor — perfect for portable speakers, DIY electronics, robotics, and custom audio builds.
Whether you're powering it from a USB source, a 3.7V lithium battery, or a standard 5V supply, this board handles it all with up to 90% efficiency and a smooth frequency response from 150Hz to 20kHz. The built-in mute control makes integration into your projects straightforward and flexible.
Made in Mainland China.
Key Specifications
- Amplifier Chip: NS8002 Class AB
- PCB Size: 16mm (L) × 10.5mm (W) × 2.6mm (H)
- Installation: SMT (Surface Mount Technology)
- Output Power: Mono 3W
- Supply Voltage: 2V–5V (compatible with 3.7V lithium battery)
- Output Impedance: 4Ω–8Ω
- Frequency Response: 150Hz–20kHz
- Efficiency: Up to 90%
- Mute Control: Yes (voltage-controlled: 0V = sound on, 0.5V–5V = mute)
- Volume Adjustment: None (fixed gain)
- Certification: CE
Wiring Notes
This board must be grounded properly. Pin 3 serves as the power supply negative and shared ground. Pin 1 is the mute control output — connect Pin 1 and Pin 3 together. When voltage is 0V, audio is active; when voltage is between 0.5V–5V, the board enters mute mode with no audio output.
What's in the Box
- 1 × Mini NS8002 Class AB Audio Amplifier Board
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Learn more: EPA guidance on lithium-ion battery handling
Frequently Asked Questions
Q: What voltage sources are compatible with this mini audio amplifier board?
A: This Class AB audio amplifier board supports a supply voltage range of 2V to 5V, making it compatible with 3V USB power, 3.7V lithium-ion batteries, and standard 5V regulated supplies — ideal for portable and battery-powered DIY projects.
Q: What speaker impedance is recommended for the NS8002 amplifier board?
A: The board is designed to work with speakers in the 4Ω to 8Ω impedance range, delivering up to 3W of mono output power with minimal distortion across a 150Hz–20kHz frequency range.
Q: How does the mute control work on this amplifier board?
A: The mute function is voltage-controlled via Pin 1. When the voltage on Pin 1 is 0V, the board outputs audio normally. When the voltage is between 0.5V and 5V, the board enters mute mode and silences the audio output — great for projects requiring automated sound switching.
Q: Is this audio amplifier board suitable for beginner electronics hobbyists?
A: Yes! Thanks to its compact SMT design and simple wiring requirements, this mono amplifier board is well-suited for hobbyists, students, and makers building portable speakers, intercom systems, or other small audio electronics projects.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.