{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UCC3809P-1G4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UCC3809P-1G4","canonicalUrl":"https://icboms.com/texas-instruments/UCC3809P-1G4","factsUrl":"https://icboms.com/api/mcp/products/UCC3809P-1G4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UCC3809P-1G4, current-mode PWM controller, 1 MHz switching frequency, 70% duty cycle, boost/buck/flyback/forward topology, 8-VSSOP package, -55 to 150 °C.","salesMarkdown":"## What the UCC3809P-1G4 is and where it fits The Texas Instruments UCC3809P-1G4 is a current-mode PWM controller built for isolated and non-isolated DC-DC converters. It handles boost, buck, flyback, and forward topologies — one part covers a lot of the power-stage designs you see in telecom bricks, industrial supplies, and auxiliary converters. The 1 MHz switching frequency lets you shrink the magnetics and output caps, which matters when board space is tight. No internal switch — this is a controller driving an external MOSFET, so you size the FET for your load. The 8-VSSOP package is small enough to fit on a mezzanine card or a cramped PSU board. ## 1 MHz switching — what it buys you Switching at 1 MHz reduces transformer and inductor size. The 70% duty cycle is typical for current-mode control. ## Temperature range and environment Rated -55 to 150 °C junction temperature. The soft-start and frequency control features help with inrush limiting and EMI tuning. ## Lifecycle and sourcing No need to panic-buy or stockpile for a BOM freeze.","metaTitle":"UCC3809P-1G4 PWM Controller, 1 MHz, 8-VSSOP","metaDescription":"UCC3809P-1G4 current-mode PWM controller from TI. 1 MHz switching, 70% duty cycle, supports boost/buck/flyback/forward. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Topology":"Boost, Buck, Flyback, Forward","Duty Cycle":"70%","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control, Soft Start","Output Isolation":"Isolated","Internal Switch(s)":"No","Voltage - Start Up":"15 V","Frequency - Switching":"1MHz","Operating Temperature":"-55°C ~ 150°C (TJ)","Supplier Device Package":"8-VSSOP","Voltage - Supply (Vcc/Vdd)":"8V ~ 19V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.34","stockQuantity":0,"priceTiers":[{"qty":224,"price":"$1.34000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d18b5c2fa7f78de57f45a668b8b69766.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can UCC3809P-1G4 be used in a flyback converter?","answer":"Yes. The topology list includes flyback, and the current-mode control with 70% duty cycle is well suited for a single-switch flyback. The 1 MHz switching lets you use a small transformer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UCC3809P-1G4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UCC3809P-1G4 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}}