{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UCC3800PWG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UCC3800PWG4","canonicalUrl":"https://icboms.com/texas-instruments/UCC3800PWG4","factsUrl":"https://icboms.com/api/mcp/products/UCC3800PWG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UCC3800PWG4 PWM controller, multi-topology (Buck, Boost, Flyback, Forward Converter), 46kHz switching frequency, 99% max duty cycle, 6.9V-12V supply, single transistor driver output, 8-TSSOP package, 0°C to 70°C operating temperature, Active, ROHS3 compliant.","salesMarkdown":"## What is UCC3800PWG4? The Texas Instruments UCC3800PWG4 is a current-mode PWM controller designed for a range of isolated and non-isolated power converter topologies: buck, boost, flyback, and forward converter. It operates with a single transistor driver output, a switching frequency of 46 kHz, and a maximum duty cycle of 99%. The controller runs from a 6.9 V to 12 V supply and is housed in an 8-pin TSSOP package for surface-mount assembly. It is rated for commercial temperature environments from 0°C to 70°C. ## 46 kHz switching — transformer and filter sizing At 46 kHz the switching period is about 21.7 µs. For a flyback or forward converter this sets the core area-product and turns ratio; expect a transformer in the RM8 or EE20 class for typical 10–30 W designs. The 99% max duty cycle lets you push the on-time nearly to the full period, which helps in low-input-voltage buck or high-step-down flyback where you need the switch on for most of the cycle. ## Supply rail and bias The 6.9 V to 12 V Vcc range means this controller needs a regulated bias rail — it won't start from a raw rectified line. A 12 V auxiliary winding or a small linear regulator is the usual feed. The undervoltage lockout thresholds are inside that window, so the supply must stay above 6.9 V during normal operation or the output driver shuts down. ## Temperature grade and environment Rated 0°C to 70°C, this is a commercial-temperature part. It belongs in indoor equipment — office power supplies, appliance control boards, telecom indoor racks — not in an engine bay, outdoor base station, or factory floor where ambient can hit 85°C. For extended temperature designs look at the UCC3800 family's industrial-grade variants. ## Lifecycle and sourcing Texas Instruments lists the UCC3800PWG4 as Active with ROHS3 compliance. There is no last-time-buy notice or obsolescence risk for new designs.","metaTitle":"UCC3800PWG4 PWM Controller, 46kHz, 8-TSSOP, Active","metaDescription":"UCC3800PWG4 PWM controller from Texas Instruments. 46kHz switching, 99% duty cycle, buck/boost/flyback/forward. 6.9V-12V supply, 0-70°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tray","Function":"Step-Up, Step-Down, Step-Up/Step-Down","Topology":"Buck, Boost, Flyback, Forward Converter","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"8-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"99%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"46kHz","Operating Temperature":"0°C ~ 70°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"8-TSSOP","Voltage - Supply (Vcc/Vdd)":"6.9V ~ 12V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.53","stockQuantity":0,"priceTiers":[{"qty":197,"price":"$1.53000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0607307955a85e4f65d0e701ed40ee4b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy UCC3800PWG4 and get a price?","answer":"UCC3800PWG4 is sourced through independent distribution. Submit an RFQ for current availability and pricing — both are confirmed at quote time."},{"question":"What is the switching frequency of UCC3800PWG4?","answer":"The switching frequency is 46 kHz."},{"question":"What is the closest functional second-source to UCC3800PWG4?","answer":"The UCC2806DWTR is a similar current-mode PWM controller from Texas Instruments, but it has dual outputs, a 50% duty cycle limit, and synchronous rectification capability. It is not a pin-compatible replacement — the package and pinout differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UCC3800PWG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UCC3800PWG4 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}}