{"product_id":"dc-3v-5v-class-ab-mono-3w-mini-audio-amplifier-board-module","title":"DC 3V–5V Class AB Mono 3W Mini Audio Amplifier Board Module","description":"\n\u003ch2\u003eDC 3V–5V Class AB Mono 3W Mini Audio Amplifier Board\u003c\/h2\u003e\n\u003cp\u003eTake your DIY audio projects to the next level with this compact, high-efficiency \u003cstrong\u003eClass AB Mono 3W Mini Audio Amplifier Board\u003c\/strong\u003e. Built around the \u003cstrong\u003eNS8002 power amplifier chip\u003c\/strong\u003e, 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.\u003c\/p\u003e\n\n\u003cp\u003eWhether 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 \u003cstrong\u003e90% efficiency\u003c\/strong\u003e and a smooth frequency response from 150Hz to 20kHz. The built-in mute control makes integration into your projects straightforward and flexible.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmplifier Chip:\u003c\/strong\u003e NS8002 Class AB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePCB Size:\u003c\/strong\u003e 16mm (L) × 10.5mm (W) × 2.6mm (H)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e SMT (Surface Mount Technology)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Power:\u003c\/strong\u003e Mono 3W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupply Voltage:\u003c\/strong\u003e 2V–5V (compatible with 3.7V lithium battery)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 4Ω–8Ω\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 150Hz–20kHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficiency:\u003c\/strong\u003e Up to 90%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMute Control:\u003c\/strong\u003e Yes (voltage-controlled: 0V = sound on, 0.5V–5V = mute)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVolume Adjustment:\u003c\/strong\u003e None (fixed gain)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWiring Notes\u003c\/h3\u003e\n\u003cp\u003eThis 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.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Mini NS8002 Class AB Audio Amplifier Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-2-inch-8-piece-hex-short-socket-set-vanadium-steel\"\u003e1\/2\" Drive 8-Piece Hex Short Socket Set – Vanadium Steel\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/105-degree-right-angle-driver-with-hex-screwdriver-bit\"\u003e105° Right Angle Driver with 1\/4\" Hex Screwdriver Bit\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-piece-complete-gardening-tool-kit\"\u003e10-Piece Gardening Tool Kit – Iron Head \u0026amp; Plastic Handle\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.epa.gov\/recycle\/used-lithium-ion-batteries\" target=\"_blank\" rel=\"noopener\"\u003eEPA guidance on lithium-ion battery handling\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltage sources are compatible with this mini audio amplifier board?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What speaker impedance is recommended for the NS8002 amplifier board?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How does the mute control work on this amplifier board?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this audio amplifier board suitable for beginner electronics hobbyists?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo 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.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltage sources are compatible with this mini audio amplifier board?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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.\"}}, {\"@type\": \"Question\", \"name\": \"What speaker impedance is recommended for the NS8002 amplifier board?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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.\"}}, {\"@type\": \"Question\", \"name\": \"How does the mute control work on this amplifier board?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The mute function is voltage-controlled via Pin 1. 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