{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4871LD/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4871LD-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4871LD-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4871LD%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Boomer® LM4871LD/NOPB, Class AB mono audio amplifier, 3W into 3Ω, 2V to 5.5V supply, shutdown and thermal protection, -40°C to 85°C, 8-WSON (4x4) exposed pad package.","salesMarkdown":"The Texas Instruments LM4871LD/NOPB is a Boomer® series Class AB audio power amplifier delivering 3W into a 3Ω load from a single mono channel. It operates from a 2V to 5.5V supply, covering single-cell Li-ion and 3.3V or 5V regulated rails. The 8-WSON (4x4) package with exposed pad suits space-constrained portable designs — speakers, headsets, toys, and battery-powered audio peripherals. Shutdown and thermal protection are integrated, so the part can idle with minimal draw and survive a stalled speaker coil without latching up. ## Supply range and output power — the fit decision The 2V to 5.5V supply range means this amplifier runs directly from a Li-ion cell (3.0V to 4.2V) without a boost converter, saving board space and BOM cost. The 3W into 3Ω rating is the headline number — but that's at 5V with a 3Ω load. At 3.6V into an 8Ω speaker, expect roughly 1W. If your design uses a 4Ω or 8Ω speaker, the output power will be lower; check the load line in the datasheet. The shutdown pin lets a GPIO or PMIC cut supply current to near-zero when audio is off, which matters for battery life in intermittent-use products. ## Package and thermal — WSON exposed pad layout It is ROHS3 compliant.","metaTitle":"Texas Instruments LM4871LD/NOPB Class AB Audio Amp, 3W Mono","metaDescription":"Texas Instruments LM4871LD/NOPB Boomer® Class AB audio amplifier, 3W mono into 3Ω, 2V-5.5V supply, -40°C to 85°C, 8-WSON package.","metaKeywords":null},"attributes":{"series":"Boomer®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Type":"Class AB","Series":"Boomer®","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Shutdown, Thermal Protection","Output Type":"1-Channel (Mono)","Mounting Type":"Surface Mount","Package / Case":"8-WDFN Exposed Pad","Product Status":"Active","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 5.5V","Base Product Number":"LM4871","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"8-WSON (4x4)","Max Output Power x Channels @ Load":"3W x 1 @ 3Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6000","priceTiers":[{"qty":1,"price":"$1.60000","currency":"USD"},{"qty":10,"price":"$1.44100","currency":"USD"},{"qty":25,"price":"$1.35960","currency":"USD"},{"qty":100,"price":"$1.15830","currency":"USD"},{"qty":250,"price":"$1.08756","currency":"USD"},{"qty":500,"price":"$0.95162","currency":"USD"},{"qty":1000,"price":"$0.78848","currency":"USD"},{"qty":2000,"price":"$0.76950","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8a46f391f29a466ba3af0aa865e92cea.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4871LD%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Is LM4871LD/NOPB obsolete or end-of-life?","answer":"No."},{"question":"What is the maximum output power of LM4871LD/NOPB?","answer":"The maximum output power is 3W into a 3Ω load from a single mono channel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4871LD-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4871LD-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}