{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4673SD/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4673SD-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4673SD-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4673SD%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4673SD/NOPB, Boomer®/PowerWise® series, Class D mono audio amplifier, 2.65W x 1 @ 4Ω, 2.4V–5.5V supply, -40°C–85°C, 8-WSON (3x3) exposed pad package.","salesMarkdown":"## Class D mono amplifier rated for 2.65 W into 4 Ω The Texas Instruments LM4673SD/NOPB is a Class D mono audio amplifier from the Boomer® and PowerWise® series, delivering 2.65 W into a 4 Ω load from a single supply. Supply range spans 2.4 V to 5.5 V. ## 2.65 W — what that means for the BOM That 2.65 W into 4 Ω is the maximum output power per channel at the rated load. For a portable speaker or soundbar channel, this delivers enough volume for a small enclosure without an external heatsink — the exposed pad on the 8-WSON (3x3) package pulls heat into the PCB copper. If your design needs more headroom, you step up to a higher-power Boomer® part; if efficiency at low volume matters more, the Class D topology already beats a linear Class AB on battery life. ## Active production, no obsolescence concern The LM4673SD/NOPB carries an Active lifecycle status from Texas Instruments. No last-time-buy or phase-out notice is on record. The part is fully ROHS3 compliant, so it meets current European and global material restrictions without exemption paperwork. ## Package and mounting — 8-WSON with exposed pad The 8-WSON exposed-pad package (3x3 mm) is a surface-mount footprint. The exposed pad must be soldered to a PCB thermal land and, ideally, connected to a ground plane for heat spreading. The part is available in Tape & Reel or Cut Tape — typical for pick-and-place assembly. No through-hole option exists.","metaTitle":"LM4673SD/NOPB TI Class D Audio Amp, 2.65W into 4Ω","metaDescription":"LM4673SD/NOPB from TI: Class D mono amplifier, 2.65W into 4Ω, 2.4V–5.5V supply, -40°C to 85°C, 8-WSON package. Active, ROHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":"Boomer®, PowerWise®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Type":"Class D","Series":"Boomer®, PowerWise®","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Depop, Differential Inputs, PWM, Short-Circuit and Thermal 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":"2.65W x 1 @ 4Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.00000","currency":"USD"},{"qty":10,"price":"$1.79500","currency":"USD"},{"qty":25,"price":"$1.69320","currency":"USD"},{"qty":100,"price":"$1.44270","currency":"USD"},{"qty":250,"price":"$1.35468","currency":"USD"},{"qty":500,"price":"$1.18534","currency":"USD"},{"qty":1000,"price":"$0.98214","currency":"USD"},{"qty":2000,"price":"$0.95850","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9893d2ba4a0654a107281eca548ba69e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between LM4673SD and LM4673SD/NOPB?","answer":"The /NOPB suffix indicates ROHS3 compliance (lead-free). The LM4673SD without the suffix is the older, non-ROHS version. Electrically they are identical; the /NOPB is the current production variant."},{"question":"What is the typical output power of LM4673SD/NOPB into 4 ohms?","answer":"The maximum output power is 2.65 W into a 4 Ω load from a single channel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4673SD-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/LM4673SD-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}