{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3409MYX/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3409MYX-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM3409MYX-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM3409MYX%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3409MYX/NOPB, DC DC Controller, Buck LED Driver, 1 Output, 6V to 42V Supply, Analog/PWM Dimming, -40°C to 125°C, 10-HVSSOP.","salesMarkdown":"## What this controller does on the board The LM3409MYX/NOPB is a constant-current buck controller from Texas Instruments, designed to drive a single string of high-power LEDs. It's a controller, not a regulator — there's no internal switch, so you pair it with an external MOSFET and inductor to handle the load current. The part supports both analog and PWM dimming, which gives you flexibility: analog for continuous current adjustment, PWM for maintaining color temperature at reduced brightness. Input supply range runs from 6V up to 42V, making it a natural fit for automotive lighting where the battery rail can swing from cold-crank to load-dump transients. The operating temperature range of -40°C to 125°C covers under-hood and exterior lighting environments without derating. ## Automotive-grade fit — what the ratings mean The 42V maximum supply voltage is the headline number for automotive work. A nominal 12V or 24V battery system can see transients well above 40V during load dump, and this controller's 42V rating gives you headroom without needing a separate clamping stage. The -40°C to 125°C junction temperature range covers both cold-start at -40°C and the heat soak under the hood in summer. If you're designing for exterior lighting — headlamps, DRLs, taillamps — the wide temperature range and high input voltage are the specs that keep the design from coming back as a field failure. ## Package and footprint notes for the layout The LM3409MYX/NOPB comes in a 10-lead HVSSOP package (3.00 mm width), which is a PowerPAD package. The exposed pad on the bottom is the main thermal path — it needs to be soldered to a copper plane on the PCB, with thermal vias stitching to an inner ground layer. Without that, the junction temperature climbs fast at higher output currents. The NOPB suffix confirms ROHS3 compliance, so no lead in the finish. ## Sourcing and lifecycle — still in production For a BOM line that needs a qualified automotive LED driver controller, this part is a safe choice for both new designs and production replenishment.","metaTitle":"LM3409MYX/NOPB LED Driver Controller, Buck, 42V","metaDescription":"TI LM3409MYX/NOPB is a DC-DC controller for LED drivers, buck topology, 6V-42V input, analog/PWM dimming, -40°C to 125°C. Active, ROHS3. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"DC DC Controller","Dimming":"Analog, PWM","Package":"Tape & Reel (TR); Cut Tape (CT)","Topology":"Step-Down (Buck)","Applications":"Automotive","Mounting Type":"Surface Mount","Package / Case":"10-PowerTFSOP, 10-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Number of Outputs":"1","Internal Switch(s)":"No","Operating Temperature":"-40°C ~ 125°C (TJ)","Voltage - Supply (Max)":"42V","Voltage - Supply (Min)":"6V","Supplier Device Package":"10-HVSSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.63","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.63000","currency":"USD"},{"qty":10,"price":"$1.46100","currency":"USD"},{"qty":25,"price":"$1.37800","currency":"USD"},{"qty":100,"price":"$1.17410","currency":"USD"},{"qty":250,"price":"$1.10240","currency":"USD"},{"qty":500,"price":"$0.96460","currency":"USD"},{"qty":1000,"price":"$0.79924","currency":"USD"},{"qty":3500,"price":"$0.78000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/61f46deabd02fff12b8992ff9aecbabe.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is LM3409MYX/NOPB suitable for automotive applications?","answer":"Yes, the LM3409MYX/NOPB is explicitly listed for Automotive applications. Its 42V maximum input voltage and -40°C to 125°C operating temperature range make it suitable for automotive lighting systems, including headlamps, daytime running lights, and taillamps."},{"question":"What is the difference between LM3409MYX/NOPB and LM3409?","answer":"The LM3409MYX/NOPB is a specific ordering code variant of the base LM3409 controller. The 'MYX' suffix indicates the 10-HVSSOP package in tape-and-reel format, and the 'NOPB' suffix confirms ROHS3 compliance. The base LM3409 part number may refer to other package options or lead-free statuses. Functionally, the core controller is the same — both are buck LED drivers with analog and PWM dimming, 6V to 42V input range, and -40°C to 125°C temperature range."},{"question":"What is the equivalent of LM3409MYX/NOPB?","answer":"The LM2703MF-ADJ/NOPB is a different part — it's a boost regulator for backlight applications, not a buck controller for LED lighting. It is not a functional equivalent. For a buck LED controller with similar input voltage range and dimming capability, the LM3409MYX/NOPB itself is the primary part; no direct second-source equivalent is listed in the available records."},{"question":"What is LM3409MYX/NOPB's listed type and dimming?","answer":"The LM3409MYX/NOPB is a DC DC Controller. It supports both Analog and PWM dimming methods for LED current control."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3409MYX-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/LM3409MYX-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}}