{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UCC3817D","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UCC3817D","canonicalUrl":"https://icboms.com/texas-instruments/UCC3817D","factsUrl":"https://icboms.com/api/mcp/products/UCC3817D","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UCC3817D, average current mode PFC controller, 6kHz to 220kHz switching frequency, 12V to 17V supply, 150µA startup, 0°C to 70°C, 16-SOIC package, active lifecycle.","salesMarkdown":"## Average current mode PFC controller for offline supplies The Texas Instruments UCC3817D is a power factor correction (PFC) controller operating in average current mode. It drives a boost-type preregulator to shape the input current waveform to follow the line voltage. Average current mode control provides stable operation across both continuous and discontinuous conduction modes, with a fixed switching frequency set by an external resistor and capacitor. The 220 kHz upper limit allows the use of smaller magnetic components than lower-frequency PFC controllers. ## Supply bias and startup — sizing the auxiliary rail The UCC3817D operates from a 12V to 17V supply rail, typical for an auxiliary winding on the PFC boost inductor or a downstream DC-DC converter. The 150 µA startup current is low enough to be supplied by a bleeder resistor from the bulk capacitor during initial power-up, with the IC taking over bias from the auxiliary winding once the output is established. The commercial temperature range (0°C to 70°C) limits this part to indoor, temperature-controlled equipment. ## Switching frequency flexibility The programmable switching frequency spans 6 kHz to 220 kHz. At the low end, the controller can synchronise to line frequency for valley-switching or low-EMI designs. At the high end, 220 kHz keeps the boost inductor physically small — a common choice for 300W to 1kW PFC stages in compact metal-enclosure supplies. ## Package and footprint Housed in a 16-SOIC (3.90 mm width) surface-mount package, the UCC3817D suits automated assembly lines. The narrow SOIC body matches the standard footprint for PFC controllers in this power class; no special thermal management is needed for the controller itself, as the gate drive current is modest. ## Sourcing and lifecycle The UCC3817D carries an active lifecycle status and is ROHS3 compliant.","metaTitle":"UCC3817D PFC Controller, Average Current, 220kHz, 16-SOIC","metaDescription":"TI UCC3817D average current mode PFC controller in 16-SOIC. Switching frequency 6kHz–220kHz, supply 12V–17V, 150µA startup. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mode":"Average Current","Package":"Tube","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"12V ~ 17V","Current - Startup":"150 µA","Frequency - Switching":"6kHz ~ 220kHz","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"16-SOIC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.75","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.75000","currency":"USD"},{"qty":10,"price":"$3.37000","currency":"USD"},{"qty":25,"price":"$3.18640","currency":"USD"},{"qty":100,"price":"$2.76150","currency":"USD"},{"qty":250,"price":"$2.61988","currency":"USD"},{"qty":500,"price":"$2.35082","currency":"USD"},{"qty":1000,"price":"$2.00400","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b157afe710468e5de7f12737d5e36883.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is UCC3817D obsolete or active?","answer":"The UCC3817D is active in production with no end-of-life notice. It is ROHS3 compliant and remains a standard catalog item for new designs."},{"question":"What is the difference between UCC3817D and UCC3817A?","answer":"The UCC3817A is a later revision with improved startup current and tighter tolerance on the voltage reference. Both are average current mode PFC controllers in the same pinout and package. The UCC3817A is generally preferred for new designs where available, but the UCC3817D remains a valid drop-in for existing BOMs that were qualified on the original revision."},{"question":"Does UCC3817D have RoHS compliance?","answer":"Yes, the UCC3817D is ROHS3 compliant, meeting the latest EU RoHS directive requirements."},{"question":"How does UCC3817D compare to UCC3818?","answer":"The UCC3818 is a pin-compatible variant with an extended switching frequency range (up to 250 kHz) and slightly different oscillator timing. Both are average current mode PFC controllers in the same 16-SOIC package. The UCC3817D covers the 6 kHz to 220 kHz range, which is sufficient for most offline PFC designs; the UCC3818 offers a marginal frequency headroom for very compact magnetics."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UCC3817D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UCC3817D 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}}