{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UCC29950D","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UCC29950D","canonicalUrl":"https://icboms.com/texas-instruments/UCC29950D","factsUrl":"https://icboms.com/api/mcp/products/UCC29950D","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UCC29950D, PFC Controller, Continuous Conduction (CCM), 87kHz ~ 109kHz, 11V ~ 18V supply, -40°C ~ 125°C, 16-SOIC package.","salesMarkdown":"## PFC controller for CCM boost stages The Texas Instruments UCC29950D is a power factor correction (PFC) controller operating in Continuous Conduction Mode (CCM), designed for boost-type PFC stages in AC-DC power supplies. It switches between 87kHz and 109kHz, suiting magnetic component sizing for designs from a few hundred watts up to several kilowatts. The wide supply range of 11V to 18V lets it run off a simple auxiliary winding or bias regulator, and the -40°C to 125°C operating temperature range covers industrial and outdoor telecom environments where the PFC stage sees elevated ambient temperatures. ## Switching frequency and magnetic sizing The 87kHz to 109kHz switching range is typical for CCM PFC controllers — fast enough to keep the boost inductor small, but not so high that gate-drive losses or switching losses dominate. At 100kHz, a 400W PFC stage with a 400V output bus needs roughly a 400µH to 600µH inductor; the controller's internal oscillator tolerance (±11% around the center frequency) is tight enough to avoid saturating the core across temperature. If you are targeting a specific EMI frequency band, the 87kHz lower edge helps keep the fundamental below 150kHz for CISPR 22 Class B conducted emissions compliance. ## Temperature grade and deployment environment Rated for -40°C to 125°C, this part is specified for industrial and automotive-adjacent applications where the PFC controller sits on a hot power board — think motor drives, battery chargers, server PSUs, or outdoor LED drivers. The 125°C junction temperature allows the controller to share a heatsink or be placed near the boost MOSFET and diode without derating the bias supply. No AEC-Q100 qualification is listed, so for under-hood automotive designs you would need to check the TI qualification status separately. ## Active lifecycle — no LTB risk ROHS3 compliant per the listing.","metaTitle":"UCC29950D PFC Controller, CCM, 87-109kHz, 16-SOIC","metaDescription":"Texas Instruments UCC29950D PFC controller in Continuous Conduction Mode. 87-109kHz switching, 11-18V supply, -40 to 125°C. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mode":"Continuous Conduction (CCM)","Package":"Tube","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"11V ~ 18V","Frequency - Switching":"87kHz ~ 109kHz","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"16-SOIC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.6","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.60000","currency":"USD"},{"qty":10,"price":"$2.34000","currency":"USD"},{"qty":25,"price":"$2.20760","currency":"USD"},{"qty":100,"price":"$1.88070","currency":"USD"},{"qty":250,"price":"$1.76596","currency":"USD"},{"qty":500,"price":"$1.54522","currency":"USD"},{"qty":1000,"price":"$1.28032","currency":"USD"},{"qty":2500,"price":"$1.24950","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e9984e50a70addb4a56b1aad25ab793b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can UCC29950D be used in a 400W PFC design?","answer":"Yes, the 87kHz to 109kHz switching frequency and CCM operation are well suited for a 400W boost PFC stage with a 400V output bus. The 11V to 18V supply range and -40°C to 125°C temperature rating support the bias and thermal requirements of such a design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UCC29950D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UCC29950D 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}}