{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC3842DG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC3842DG4","canonicalUrl":"https://icboms.com/texas-instruments/UC3842DG4","factsUrl":"https://icboms.com/api/mcp/products/UC3842DG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC3842DG4 current-mode PWM controller, SOIC-14, 10V-30V supply, 500kHz switching, 97% duty cycle, boost/buck/flyback/forward topology.","salesMarkdown":"## SOIC-14 footprint and board integration The UC3842DG4: The 14-SOIC (0.154\", 3.90mm Width) package lands on a standard surface-mount footprint with 1.27 mm pitch — the same pad geometry used across the UC384x family, so a layout proven for the UC3842B or UC3843A carries over without a respin. Supply voltage spans 10 V to 30 V (Vcc/Vdd), which covers the bias rail from a 12 V auxiliary winding or a regulated 24 V bus without an external LDO. Operating temperature is rated 0°C to 70°C (TA) — a commercial-grade window suited for bench supplies, telecom bricks, and indoor power adapters where the ambient stays below 70°C. ## 97% duty cycle and 500 kHz switching ceiling The current-mode PWM controller drives a single transistor output at up to 500 kHz, with a maximum duty cycle of 97% — wide enough to regulate a flyback converter down to a low line input without pulse-skipping. Topology support covers boost, buck, buck-boost, flyback, and forward converters — the same controller handles isolated and non-isolated designs, so a single BOM line serves multiple power stages. No clock sync input and no synchronous rectifier drive — this is a standalone controller for simple, cost-sensitive converters where external sync is not required.","metaTitle":"UC3842DG4 PWM Controller, 500kHz, 97% Duty, SOIC-14","metaDescription":"UC3842DG4 current-mode PWM controller, 10V-30V supply, 500kHz switching, 97% max duty. Active production, ROHS3. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Bulk","Function":"Step-Up, Step-Down, Step-Up/Step-Down","Topology":"Boost, Buck, Buck-Boost, Flyback, Forward","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"14-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"97%","Number of Outputs":"1","Serial Interfaces":"-","Base Product Number":"UC384","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"Up to 500kHz","Operating Temperature":"0°C~70°C(TA)","Synchronous Rectifier":"No","Supplier Device Package":"14-SOIC","Voltage - Supply (Vcc/Vdd)":"10V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5600","priceTiers":[{"qty":535,"price":"$0.56000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3edad1712993fb3b1751953d793dcfb6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/UC3842DG4/alternatives.json"},"ai":{"faq":[{"question":"What topologies does UC3842DG4 support?","answer":"It supports boost, buck, buck-boost, flyback, and forward converters — both isolated and non-isolated, with a positive output configuration."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC3842DG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC3842DG4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}