{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC2845N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC2845N","canonicalUrl":"https://icboms.com/texas-instruments/UC2845N","factsUrl":"https://icboms.com/api/mcp/products/UC2845N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC2845N current-mode PWM controller, 8-DIP (0.300\", 7.62mm) through-hole package, Boost/Buck/Flyback/Forward topologies, up to 500kHz switching, 12V-28V supply, 48% max duty cycle, -40°C to 85°C.","salesMarkdown":"## Multi-topology current-mode PWM controller The Texas Instruments UC2845N is a current-mode PWM controller that supports Boost, Buck, Flyback, and Forward converter topologies — one part number covers isolated and non-isolated designs across a 12V to 28V supply range. The 48% maximum duty cycle sets a practical limit on step-down ratio in a single-switch Buck or Flyback; for higher ratios you'd cascade stages or move to a controller with >50% duty. The 500 kHz switching ceiling lets you shrink magnetics, but the trade-off is tighter layout to keep switching-node ringing under control. ## Through-hole package and temperature grade Housed in an 8-pin DIP (0.300\", 7.62mm) through-hole package, the UC2845N is a hand-solderable part suited for prototyping, low-volume production, or rework — no hot-air profile needed. The single transistor-driver output drives an external MOSFET or IGBT directly; with the output configured for positive, isolation-capable drive, it pairs naturally with a pulse transformer for galvanically isolated gate drive in Flyback or Forward converters.","metaTitle":"Texas Instruments UC2845N PWM Controller, 8-DIP, 500kHz","metaDescription":"Texas Instruments UC2845N current-mode PWM controller. Active, ROHS3 compliant. Supports Boost, Buck, Flyback, Forward topologies.","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":"Boost, Buck, Flyback, Forward","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Through Hole","Output Phases":"1","Package / Case":"8-DIP (0.300\\\", 7.62mm)","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-PDIP","Voltage - Supply (Vcc/Vdd)":"12V ~ 28V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.74","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.74000","currency":"USD"},{"qty":10,"price":"$1.55900","currency":"USD"},{"qty":25,"price":"$1.47080","currency":"USD"},{"qty":100,"price":"$1.25310","currency":"USD"},{"qty":250,"price":"$1.17660","currency":"USD"},{"qty":500,"price":"$1.02952","currency":"USD"},{"qty":1000,"price":"$0.85304","currency":"USD"},{"qty":2500,"price":"$0.83250","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3edad1712993fb3b1751953d793dcfb6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional second-source to UC2845N — UCC2806DWTR?","answer":"The UCC2806DWTR is a dual-output current-mode controller with 50% duty cycle and synchronous rectifier capability, but it is a surface-mount SOIC part with a different pinout and dual outputs. The UC2845N is a single-output through-hole DIP-8 — they are not drop-in replacements. A board redesign would be required to swap between them."},{"question":"What topologies does UC2845N support?","answer":"The UC2845N supports Boost, Buck, Flyback, and Forward converter topologies with a single transistor-driver output. The output configuration is positive and isolation-capable, making it suitable for both non-isolated and isolated power supplies."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC2845N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC2845N 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}}