{"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. ## 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. 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. 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","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","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,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3409MYX%2FNOPB/alternatives.json"},"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":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}