{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4873LQ","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4873LQ","canonicalUrl":"https://icboms.com/texas-instruments/LM4873LQ","factsUrl":"https://icboms.com/api/mcp/products/LM4873LQ","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Boomer® series, Class AB audio amplifier, 2-channel (stereo) with stereo headphones, 3W x 2 @ 3Ω, 440mW x 2 @ 8Ω, 2V–5.5V supply, -40°C to 85°C, 24-WQFN (4x5) package.","salesMarkdown":"## Output power and load matching The LM4873LQ: The 3W x 2 into 3Ω rating is the output a designer sizes the supply and heatsinking for. The 440mW x 2 into 8Ω headphone channel runs off the same die. ## Built-in mux and protection features The input multiplexer lets the amplifier switch between two audio sources (e.g., line-in and Bluetooth module) without an external analog switch. Depop circuitry suppresses the turn-on/turn-off pop that otherwise requires a muting FET or series relay. Thermal protection shuts down the output if the die exceeds the safe junction temperature — useful when driving low-impedance loads at high ambient. Listed as active with no end-of-life notice. RoHS non-compliant — verify your assembly house can accept the lead-bearing finish, or look at the RoHS-compliant variant if the BOM requires it.","metaTitle":"LM4873LQ Audio Amplifier, Class AB, 3W x 2 @ 3Ω, 24-WQFN","metaDescription":"LM4873LQ from Texas Instruments Boomer® series — Class AB stereo amplifier with headphone output, 3W x 2 @ 3Ω, 2V–5.5V supply, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":"Boomer®","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"Class AB","Series":"Boomer®","Package":"Bulk","Features":"Depop, Input Multiplexer, Shutdown, Thermal Protection","Output Type":"2-Channel (Stereo) with Stereo Headphones","Mounting Type":"Surface Mount","Package / Case":"24-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"24-WQFN (4x5)","Max Output Power x Channels @ Load":"3W x 2 @ 3Ohm; 440mW x 2 @ 8Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.94","priceTiers":[{"qty":321,"price":"$0.94000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e279b225158110e58220032fb833f23a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4873LQ/alternatives.json"},"ai":{"faq":[{"question":"Can LM4873LQ drive 4 ohm speakers?","answer":"Yes — the 3W x 2 rating into 3Ω shows the amplifier can drive 4Ω loads, though output power will be lower than the 3Ω figure. Derate linearly with load impedance."},{"question":"What are the typical operating conditions for LM4873LQ?","answer":"Supply voltage 2V to 5.5V, ambient temperature -40°C to 85°C. Output power depends on load: 3W per channel into 3Ω, 440mW per channel into 8Ω."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4873LQ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4873LQ 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}}