{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC2844D8TR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC2844D8TR","canonicalUrl":"https://icboms.com/texas-instruments/UC2844D8TR","factsUrl":"https://icboms.com/api/mcp/products/UC2844D8TR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC2844D8TR current-mode PWM controller, 8-SOIC, up to 500kHz switching, 48% max duty cycle, 12V to 28V supply, -40°C to 85°C.","salesMarkdown":"## 48% duty-cycle limit — what it means for your topology The UC2844D8TR is a current-mode PWM controller from Texas Instruments designed for isolated and non-isolated DC-DC converters. Its 48% maximum duty cycle makes it a natural fit for flyback and forward topologies where you need to guarantee transformer reset between cycles — you won't get pulse-width creep into the off-time. The part supports boost, buck, and flyback/forward configurations, all driven by a single transistor driver output. Switching frequency runs up to 500 kHz, which lets you shrink the magnetics compared to a 100 kHz design, but keep an eye on the gate-drive losses at the high end — the 12 V to 28 V supply range gives you headroom for a robust gate signal even with a 12 V rail. ## Active status — no LTB scramble needed The UC2844D8TR carries an active lifecycle status and is ROHS3 compliant. That means no last-time-buy clock ticking for new designs — you can qualify it into a BOM without worrying about an EOL notice next quarter. The 8-SOIC package (0.154\" body width) is a standard footprint shared across the UC284x family, so board layout is straightforward. ## Temperature range and environment Rated for -40°C to 85°C ambient, this part fits industrial and outdoor telecom equipment where the enclosure sees seasonal temperature swings. It is not automotive-grade (no AEC-Q100 in the record), so for under-hood or engine-bay use you would look at the LM5150QURUMRQ1 which carries that qualification and a wider 150°C junction rating.","metaTitle":"UC2844D8TR PWM Controller IC, 48% Duty Cycle, 500kHz, 8-SOIC","metaDescription":"UC2844D8TR current-mode PWM controller for boost, buck, flyback, forward converters. Up to 500kHz switching, 48% max duty cycle, -40°C to 85°C. Active, RoHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Up, Step-Down, Step-Up/Step-Down","Topology":"Boost, Buck, Flyback, Forward","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"48%","Number of Outputs":"1","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"Up to 500kHz","Operating Temperature":"-40°C ~ 85°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"8-SOIC","Voltage - Supply (Vcc/Vdd)":"12V ~ 28V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.49","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.49000","currency":"USD"},{"qty":10,"price":"$1.33200","currency":"USD"},{"qty":25,"price":"$1.26440","currency":"USD"},{"qty":100,"price":"$1.03860","currency":"USD"},{"qty":250,"price":"$0.97084","currency":"USD"},{"qty":500,"price":"$0.85796","currency":"USD"},{"qty":1000,"price":"$0.67734","currency":"USD"},{"qty":2500,"price":"$0.63900","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3edad1712993fb3b1751953d793dcfb6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can UC2844D8TR be used for a 12V to 5V buck converter?","answer":"Yes — the controller supports buck topology, and its 12 V to 28 V supply range covers a 12 V input. The 48% duty-cycle limit means the output voltage will be less than half the input in continuous conduction mode, so a 12 V to 5 V conversion is within the envelope."},{"question":"What is the difference between UC2844 and UC3844?","answer":"The primary difference is the operating temperature range. The UC2844 series is specified for -40°C to 85°C (industrial), while the UC3844 series is typically rated for 0°C to 70°C (commercial). The UC2844D8TR is the industrial-temperature variant in an 8-SOIC package."},{"question":"Can UC2844D8TR be used in a flyback converter?","answer":"Yes — flyback is one of the supported topologies. The 48% maximum duty cycle ensures the transformer resets fully each cycle, which is critical for flyback designs. The current-mode control loop also simplifies compensation and provides cycle-by-cycle current limiting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC2844D8TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC2844D8TR 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}}