{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL1451CN","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL1451CN","canonicalUrl":"https://icboms.com/texas-instruments/TL1451CN","factsUrl":"https://icboms.com/api/mcp/products/TL1451CN","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL1451CN PWM controller, Step-Up/Step-Down/Buck/Boost/Flyback, Transistor Driver output, 2 outputs, 1kHz-500kHz, 3.6V-50V supply, 16-DIP (0.300\", 7.62mm), Through Hole, Tube.","salesMarkdown":"## What this PWM controller does in a power stage The Texas Instruments TL1451CN is a dual-output PWM controller that handles step-up, step-down, and step-up/step-down conversion across buck, boost, and flyback topologies — a single IC that covers the three most common non-isolated and isolated power stage architectures. The switching frequency spans 1 kHz to 500 kHz, set by an external RC network, so you tune the magnetics size against the switching loss trade-off. ## Package and board-fit for a through-hole design The supplier device package is 16-PDIP. The tube packaging means it ships in the standard anti-static tube for DIP devices — no reel, no carrier tape. For a small-run or repair BOM, this is the expected format. ## Output stage and control features Two transistor-driver outputs, each capable of driving an external MOSFET or bipolar switch, with a single output phase per channel. The output configuration is positive — the driver sources current to the gate or base. Control features include frequency control via an external timing resistor and capacitor — no internal oscillator lock. There is no clock sync input, so synchronizing multiple controllers to a common clock requires an external oscillator feeding the RT/CT pin. There is no synchronous rectifier output — the TL1451CN drives the primary-side switch only. For the secondary side, you add an external synchronous rectifier controller or use a Schottky diode. ## Temperature grade and operating environment Rated for -20°C to +85°C ambient — the commercial/industrial temperature band. It is not specified for -40°C cold start, so an outdoor enclosure in a -30°C winter needs a heater or a wider-temp part.","metaTitle":"TL1451CN PWM Controller, Buck/Boost/Flyback, 16-DIP","metaDescription":"Texas Instruments TL1451CN PWM controller IC. Active, ROHS3 compliant. Step-Up/Step-Down, Buck, Boost, Flyback topology. 3.6V-50V supply. 16-DIP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Step-Up, Step-Down, Step-Up/Step-Down","Topology":"Buck, Boost, Flyback","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Through Hole","Output Phases":"1","Package / Case":"16-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Number of Outputs":"2","Output Configuration":"Positive","Frequency - Switching":"1kHz ~ 500kHz","Operating Temperature":"-20°C ~ 85°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"16-PDIP","Voltage - Supply (Vcc/Vdd)":"3.6V ~ 50V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.66","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.66000","currency":"USD"},{"qty":10,"price":"$2.38800","currency":"USD"},{"qty":25,"price":"$2.25240","currency":"USD"},{"qty":100,"price":"$1.91910","currency":"USD"},{"qty":250,"price":"$1.80200","currency":"USD"},{"qty":500,"price":"$1.57676","currency":"USD"},{"qty":1000,"price":"$1.30645","currency":"USD"},{"qty":2500,"price":"$1.27500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/69690ddb0cc27a922456eb2f2e837e8a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Will TL1451CN drop into a panel that was specified around TPS53124RGET without rewiring?","answer":"No — the TL1451CN is through-hole (16-DIP) while the TPS53124RGET is surface mount (QFN). The pinout, supply voltage range, and topology support differ completely. A board redesign is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL1451CN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL1451CN 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}}