{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UCC28C45QDRQ1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UCC28C45QDRQ1","canonicalUrl":"https://icboms.com/texas-instruments/UCC28C45QDRQ1","factsUrl":"https://icboms.com/api/mcp/products/UCC28C45QDRQ1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UCC28C45QDRQ1, Automotive AEC-Q100 current-mode PWM controller, up to 1 MHz switching frequency, 48% max duty cycle, 7.6 V to 18 V supply, -40°C to 125°C, 8-SOIC package.","salesMarkdown":"## Automotive current-mode PWM controller — UCC28C45QDRQ1 The Texas Instruments UCC28C45QDRQ1 is an automotive-grade (AEC-Q100) BiCMOS current-mode PWM controller designed for step-up and step-up/step-down topologies including boost, flyback, and forward converters. It integrates a single transistor driver output, operates from a 7.6 V to 18 V supply, and switches at frequencies up to 1 MHz. The 48% maximum duty cycle suits single-ended converter designs typical in automotive power supplies, DC-DC modules, and isolated bias rails. ## 48% duty cycle and 1 MHz switching — what they mean for the transformer The 48% duty-cycle ceiling is a hard limit for single-ended topologies like flyback and forward converters — it prevents transformer saturation by guaranteeing a minimum reset time. At 1 MHz, the controller lets you shrink the magnetic components significantly compared to a 100 kHz design, but the 48% cap means you cannot push past the half-cycle mark even with frequency foldback. For a forward converter, the reset winding turns ratio must be sized within this window. ## Temperature range and automotive qualification Rated for -40°C to 125°C ambient, this part is built for under-hood and engine-bay environments where the thermal cycling is severe. The AEC-Q100 qualification means it has passed the full suite of stress tests — high-temperature operating life, temperature cycling, and moisture sensitivity — that consumer-grade PWM controllers skip. If your BOM calls out a Q1 suffix, the laser etch and date-code trace should match TI's automotive production lines; a mismatched font or inconsistent lot code flags potential gray-market re-marking. ## Package and footprint — 8-SOIC surface mount Housed in the standard 8-SOIC package (3.90 mm body width), the UCC28C45QDRQ1 drops into any SOIC-8 footprint without layout changes. The supplier device package is 8-SOIC. The Tape & Reel (TR) or Cut Tape (CT) options suit both prototype and production volumes. No exposed pad — thermal dissipation is through the leads and board copper, so the layout should include adequate copper pour under the part for continuous operation near the 125°C limit. ## Lifecycle and compliance The UCC28C45QDRQ1 is listed as Active with ROHS3 compliance.","metaTitle":"UCC28C45QDRQ1 Automotive PWM Controller, 1 MHz, 8-SOIC","metaDescription":"UCC28C45QDRQ1 automotive AEC-Q100 current-mode PWM controller. 48% duty cycle, up to 1 MHz switching, -40°C to 125°C. Boost/flyback/forward. Available to order.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Up, Step-Up/Step-Down","Topology":"Boost, Flyback, Forward Converter","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"48%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"Up to 1MHz","Operating Temperature":"-40°C ~ 125°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"8-SOIC","Voltage - Supply (Vcc/Vdd)":"7.6V ~ 18V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.98","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.98000","currency":"USD"},{"qty":10,"price":"$1.77500","currency":"USD"},{"qty":25,"price":"$1.67480","currency":"USD"},{"qty":100,"price":"$1.42690","currency":"USD"},{"qty":250,"price":"$1.33984","currency":"USD"},{"qty":500,"price":"$1.17236","currency":"USD"},{"qty":1000,"price":"$0.97138","currency":"USD"},{"qty":2500,"price":"$0.94800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/60ac4507608e8ecf5515c7f49dfff72c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Will UCC28C45QDRQ1 drop into a board designed for UCC2806DWTR?","answer":"Not without rewiring. The UCC2806DWTR is a dual-output PWM controller with synchronous rectification and a 50% duty cycle, while the UCC28C45QDRQ1 is a single-output controller with 48% duty cycle and no synchronous rectifier. The pin functions and control architecture differ — a direct drop-in is not possible."},{"question":"What compliance documentation does this part carry?","answer":"The UCC28C45QDRQ1 is ROHS3 compliant and AEC-Q100 qualified for automotive applications. The manufacturer's datasheet includes the full compliance declaration; TI typically provides REACH and conflict-minerals reports on request through their compliance portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UCC28C45QDRQ1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UCC28C45QDRQ1 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}}