{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4940TSX/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4940TSX-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4940TSX-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4940TSX%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Boomer LM4940TSX/NOPB, Class AB stereo audio amplifier, 6W x 2 at 4Ω, 10V to 16V supply, -40°C to 85°C, surface-mount DDPAK/TO-263-9.","salesMarkdown":"## Class AB stereo amp delivering 6W per channel into 4Ω The Texas Instruments LM4940TSX/NOPB is a Boomer series Class AB stereo audio amplifier rated for 6W per channel into a 4Ω load. Its 10V to 16V supply range suits it for line-powered audio equipment, automotive head units, and industrial audio systems where a clean Class AB output stage is preferred over a switching Class D design — simpler EMI management and no output filter. The part integrates depop circuitry, short-circuit and thermal protection, and a shutdown function, reducing external component count. ## Package and thermal path Housed in a DDPAK/TO-263-9 surface-mount package (9 leads plus exposed tab), the LM4940TSX/NOPB routes the main heat through the tab. The tab is the primary thermal dissipation path — the PCB copper plane under it must be stitched with vias to a thermal relief on the bottom layer.","metaTitle":"LM4940TSX/NOPB Class AB Stereo Amplifier, 6W x 2 at 4Ω","metaDescription":"TI LM4940TSX/NOPB Boomer Class AB stereo audio amp, 6W per channel into 4Ω, -40 to 85°C, DDPAK/TO-263-9. Active, ROHS3. Available to order.","metaKeywords":null},"attributes":{"series":"Boomer®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Type":"Class AB","Series":"Boomer®","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Depop, Short-Circuit and Thermal Protection, Shutdown","Output Type":"2-Channel (Stereo)","Mounting Type":"Surface Mount","Package / Case":"TO-263-10 (9 Leads + Tab)","lifecycle_stage":"eol_hot","Voltage - Supply":"10V ~ 16V","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"DDPAK/TO-263-9","Max Output Power x Channels @ Load":"6W x 2 @ 4Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.46","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.46000","currency":"USD"},{"qty":10,"price":"$3.10300","currency":"USD"},{"qty":25,"price":"$2.93360","currency":"USD"},{"qty":100,"price":"$2.54240","currency":"USD"},{"qty":250,"price":"$2.41204","currency":"USD"},{"qty":500,"price":"$2.16430","currency":"USD"},{"qty":1000,"price":"$1.84500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/43b67daba5f8114c176d61db41ab948f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the output power of LM4940TSX/NOPB?","answer":"It delivers 6W per channel into a 4Ω load in stereo mode."},{"question":"What is the equivalent part for LM4940TSX/NOPB?","answer":"The Boomer series includes other stereo Class AB amplifiers, but pin assignments vary — verify footprint compatibility against the datasheet before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4940TSX-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/LM4940TSX-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}}