{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC2844ADTR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC2844ADTR","canonicalUrl":"https://icboms.com/texas-instruments/UC2844ADTR","factsUrl":"https://icboms.com/api/mcp/products/UC2844ADTR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC2844ADTR current-mode PWM controller, 500kHz switching, 48% max duty cycle, 10-30V supply, 14-SOIC surface mount, Tape & Reel.","salesMarkdown":"## Switching frequency and duty-cycle limits for transformer design The UC2844ADTR switches at up to 500 kHz, which sets the practical upper bound for transformer core size and turns ratio in a flyback or forward converter — a 100 kHz design leaves plenty of headroom, but pushing toward 500 kHz demands a core material with low loss at that frequency and careful layout to keep switching-node ringing within the 48% max duty-cycle window. The 48% duty-cycle ceiling means the controller cannot command on-times longer than 48% of the switching period — for a flyback operating in continuous conduction mode, this limits the maximum step-up ratio; if the design needs a higher ratio, the transformer turns ratio or the input voltage must compensate. ## Multi-topology flexibility and external switch requirement This part supports boost, buck, flyback, and forward topologies — the same controller can serve isolated and non-isolated rails across a BOM, reducing qualification effort. The output is a transistor driver, so an external power switch (MOSFET or BJT) is required; the controller does not integrate the switch, which gives the designer freedom to size the FET for the actual load current. The supply range spans 10 V to 30 V on Vcc, covering standard bias rails from a 12 V auxiliary winding or a 24 V industrial bus. The undervoltage lockout thresholds are set internally for this range, so no external UVLO resistor divider is needed. ## Active lifecycle and compliance status The part is ROHS3 compliant, which satisfies the material restriction requirements for EU and most global markets without an exemption expiry concern.","metaTitle":"Texas Instruments UC2844ADTR PWM Controller, 500kHz, 14-SOIC","metaDescription":"UC2844ADTR current-mode PWM controller from TI. Active production, ROHS3 compliant. 500kHz switching, 48% max duty, 10-30V supply.","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":"14-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":"14-SOIC","Voltage - Supply (Vcc/Vdd)":"10V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.22","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.22000","currency":"USD"},{"qty":10,"price":"$1.09400","currency":"USD"},{"qty":25,"price":"$1.03880","currency":"USD"},{"qty":100,"price":"$0.85330","currency":"USD"},{"qty":250,"price":"$0.79764","currency":"USD"},{"qty":500,"price":"$0.70490","currency":"USD"},{"qty":1000,"price":"$0.55650","currency":"USD"},{"qty":2500,"price":"$0.52500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/536891bbf6907bbea70f31ce571541e7.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What compliance documentation does Texas Instruments provide for UC2844ADTR?","answer":"Texas Instruments provides ROHS3 compliance certification for the UC2844ADTR. No UL, IEC, or REACH documentation is listed in the available records for this part number."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC2844ADTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC2844ADTR 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}}