{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4670SD","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4670SD","canonicalUrl":"https://icboms.com/texas-instruments/LM4670SD","factsUrl":"https://icboms.com/api/mcp/products/LM4670SD","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Boomer® Class D audio amplifier, LM4670SD, 1-channel (mono), 3W output into 4Ω, 2.4V to 5.5V supply, 8-WFDFN exposed pad, surface mount.","salesMarkdown":"## 3W mono Class D into a 3x3 mm footprint The LM4670SD is a Texas Instruments Boomer® Class D audio amplifier delivering 3W continuous into a 4Ω load from a single 2.4V to 5.5V supply — enough output for a portable speaker or a notification chime driven off a Li-ion cell without a boost converter. The 8-WSON (3x3 mm) package with exposed pad sinks the heat from a 3W sine wave into the PCB copper plane; the thermal pad is the primary thermal path, not the plastic body. ## Supply range and integrated protection On-chip short-circuit protection and a shutdown pin let the system disable the output stage when the speaker is not needed, cutting quiescent draw to near-zero in a battery-powered design. Differential inputs reject common-mode noise picked up on the audio traces between the codec and the amplifier, which matters when the PCB layout routes analog audio past a switching regulator or a digital bus. The 8-WSON (3x3 mm) supplier device package matches the 8-WFDFN with exposed pad — the footprint is a 3x3 mm DFN with a central thermal pad that must be soldered to a copper pour for the rated output power. RoHS non-compliant per the manufacturer's listing — a factor for designs that must meet EU RoHS exemption limits; confirm the specific date-code compliance against your BOM's regulatory requirement.","metaTitle":"Texas Instruments LM4670SD Class D Audio Amp, 3W x 1 @ 4Ω","metaDescription":"Texas Instruments LM4670SD Boomer® Class D audio amplifier, 3W mono output into 4Ω, 2.4-5.5V supply, 8-WSON package. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":"Boomer®","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"Class D","Series":"Boomer®","Package":"Bulk","Features":"Depop, Differential Inputs, Short-Circuit Protection, Shutdown","Output Type":"1-Channel (Mono)","Mounting Type":"Surface Mount","Package / Case":"8-WFDFN Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Supply":"2.4V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-WSON (3x3)","Max Output Power x Channels @ Load":"3W x 1 @ 4Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.53","stockQuantity":0,"priceTiers":[{"qty":566,"price":"$0.53000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1d4c1726a2127ece7c0584ddd68940e8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the LM4670SD's output power into 4Ω?","answer":"3W continuous into a 4Ω load from a single channel (mono), with a supply voltage within the 2.4V to 5.5V range."},{"question":"What package does the LM4670SD come in?","answer":"An 8-WSON (3x3 mm) with exposed pad, also described as an 8-WFDFN exposed pad package."},{"question":"Is the LM4670SD RoHS compliant?","answer":"Texas Instruments lists this part as RoHS non-compliant. Verify the specific date code and exemption status against your regulatory requirements before committing the BOM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4670SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4670SD 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}}