{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC2843DTR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC2843DTR","canonicalUrl":"https://icboms.com/texas-instruments/UC2843DTR","factsUrl":"https://icboms.com/api/mcp/products/UC2843DTR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC2843DTR current-mode PWM controller, 14-SOIC surface-mount package, up to 500kHz switching, 97% max duty cycle, 12V to 28V supply, -40°C to 85°C operating temperature.","salesMarkdown":"## Current-mode PWM controller for isolated and non-isolated supplies The UC2843DTR is a current-mode PWM controller from Texas Instruments that handles step-up, step-down, and step-up/step-down topologies including boost, buck, buck-boost, flyback, and forward converters. It drives a single transistor output with positive configuration and isolation capability, making it a fit for offline flyback supplies or DC-DC converters where galvanic isolation is required. Switching frequency reaches up to 500 kHz, and the maximum duty cycle of 97% allows wide input-to-output voltage ratios in boost and flyback stages. ## Supply range, temperature grade, and control features Operating from a 12 V to 28 V supply (Vcc/Vdd), the controller suits industrial and telecom bus rails where the input is already regulated to 24 V nominal. Frequency control is available as a control feature, allowing the designer to synchronize or adjust the switching frequency with an external RC network. Clock sync is not supported internally, so multiple converters in the same system must either free-run at different frequencies or use an external sync injection circuit. ## Package, footprint, and procurement options Supplied in tape-and-reel (TR) or cut-tape (CT) options, so it fits both volume pick-and-place lines and prototype bench runs.","metaTitle":"Texas Instruments UC2843DTR PWM Controller, 500kHz, 14-SOIC","metaDescription":"UC2843DTR current-mode PWM controller from TI. Active, ROHS3. Up to 500kHz, 97% duty, 12-28V supply. Boost, buck, flyback, forward. 14-SOIC. Order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Up, Step-Down, Step-Up/Step-Down","Topology":"Boost, Buck, Buck-Boost, 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)":"97%","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)":"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":"What topologies does the UC2843DTR support?","answer":"The UC2843DTR supports boost, buck, buck-boost, flyback, and forward topologies. It is a current-mode PWM controller with a single transistor driver output, positive configuration, and isolation capability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC2843DTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC2843DTR 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}}