{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC3843AD1","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"UC3843AD1","canonicalUrl":"https://icboms.com/stmicroelectronics/UC3843AD1","factsUrl":"https://icboms.com/api/mcp/products/UC3843AD1","rawCanonicalId":null},"summary":{"shortDescription":"UC3843AD1, current-mode PWM controller, boost/flyback, up to 500 kHz switching, 96% duty cycle, 10-30 V supply, 0-70°C, 8-SOIC, tube.","salesMarkdown":"It drives a single external transistor with a maximum duty cycle of 96% and switches at frequencies up to 500 kHz. The 10 V to 30 V supply range covers standard telecom and industrial bus voltages. Housed in an 8-SOIC (0.154-inch body width) surface-mount package, the UC3843AD1 fits a standard SOIC-8 footprint. The UC3843AD1 is officially obsolete. For production runs, this part must be sourced through independent distribution or the surplus market. ## Sourcing the UC3843AD1 today The UC3843 family in SOIC-8 is pin-compatible; verify the operating temperature grade matches your environment.","metaTitle":"UC3843AD1 PWM Controller, Obsolete, Boost/Flyback, 500 kHz","metaDescription":"UC3843AD1 is an obsolete current-mode PWM controller from the UC3843 family. Boost/flyback topology, up to 500 kHz switching, 96% duty cycle, 0-70°C, SOIC-8.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tube","Function":"Step-Up, Step-Up/Step-Down","Topology":"Boost, Flyback","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"96%","Number of Outputs":"1","Serial Interfaces":"-","Base Product Number":"UC3843","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"Up to 500kHz","Operating Temperature":"0°C ~ 70°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"8-SOIC","Voltage - Supply (Vcc/Vdd)":"10V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1c6372920fffccb37a811a01b03b60aa.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/UC3843AD1/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/UC3843AD1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/UC3843AD1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}