{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC3844AD8TR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC3844AD8TR","canonicalUrl":"https://icboms.com/texas-instruments/UC3844AD8TR","factsUrl":"https://icboms.com/api/mcp/products/UC3844AD8TR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC3844AD8TR current-mode PWM controller, 48% max duty cycle, switching frequency up to 500 kHz, 10V to 30V supply, 8-SOIC package, commercial temperature range 0°C to 70°C.","salesMarkdown":"## Current-mode PWM controller for flyback and forward converters The UC3844AD8TR is a current-mode PWM controller for off-line and DC-to-DC converter applications. It supports boost, buck, flyback, and forward topologies, with a single transistor-driver output. Key parameters include a maximum duty cycle of 48%, switching frequency up to 500 kHz, and a supply range of 10V to 30V. The UC3844AD8TR is an active, current-production part with no NRND or EOL flags. It is ROHS3 compliant. No last-time-buy risk for new designs. Supplied in Tape & Reel (TR) or Cut Tape (CT) for the 8-SOIC package (body 3.90 mm width). The part is surface-mount, intended for automated assembly. No thermal pad — junction-to-ambient thermal resistance is managed through the SOIC's leads and PCB copper.","metaTitle":"UC3844AD8TR Current-Mode PWM Controller, 48% Duty Cycle","metaDescription":"UC3844AD8TR is a current-mode PWM controller from the UC3844A family. Switching frequency up to 500 kHz, max duty cycle 48%, 10V to 30V supply.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","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)","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"48%","Number of Outputs":"1","Serial Interfaces":"-","Base Product Number":"UC3844","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"Up to 500kHz","Operating Temperature":"0°C~70°C(TA)","Synchronous Rectifier":"No","Supplier Device Package":"8-SOIC","Voltage - Supply (Vcc/Vdd)":"10V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1200","priceTiers":[{"qty":1,"price":"$1.12000","currency":"USD"},{"qty":10,"price":"$1.00100","currency":"USD"},{"qty":25,"price":"$0.94960","currency":"USD"},{"qty":100,"price":"$0.78020","currency":"USD"},{"qty":250,"price":"$0.72928","currency":"USD"},{"qty":500,"price":"$0.64448","currency":"USD"},{"qty":1000,"price":"$0.50880","currency":"USD"},{"qty":2500,"price":"$0.48000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/72463d7c352ecebe0441deb1ec8c852d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/UC3844AD8TR/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum duty cycle of UC3844AD8TR?","answer":"The maximum duty cycle is 48%. This is a fixed clamp — the part will not operate above this limit, which is intentional for flyback and forward converter designs requiring slope compensation."},{"question":"What is the closest functional second-source to UC3844AD8TR?","answer":"The UCC2806DWTR is a peer with similar topology support (boost, flyback, forward) and a 50% duty cycle, but it has two outputs and a lower switching frequency of 47 kHz. It is not a pin-compatible drop-in; the different output count and frequency require a board redesign. For a direct functional match within the same family, the UC3844AD8TR itself is the standard choice."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC3844AD8TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC3844AD8TR 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}}