{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC3843BN","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"UC3843BN","canonicalUrl":"https://icboms.com/stmicroelectronics/UC3843BN","factsUrl":"https://icboms.com/api/mcp/products/UC3843BN","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics UC3843BN, current-mode PWM controller, boost/flyback topology, 8-DIP package, switching frequency up to 500 kHz, max duty cycle 96%.","salesMarkdown":"## Boost and flyback controller – key ratings The UC3843BN: The single transistor-driver output drives an external power switch, and the part includes frequency control for setting the oscillator. Switching frequency reaches up to 500 kHz, which lets the designer shrink the magnetic components — a practical advantage when board space is tight. The maximum duty cycle of 96% gives headroom for high step-up ratios or low-input-voltage operation without pulse skipping. Supply voltage range is 7.6 V to 30 V. ## Package and mounting – through-hole 8-DIP Housed in an 8-DIP (0.300-inch, 7.62 mm) package with through-hole mounting, the UC3843BN is straightforward to hand-assemble or rework.","metaTitle":"UC3843BN STMicroelectronics PWM Controller – Obsolete","metaDescription":"UC3843BN STMicroelectronics current-mode PWM controller, boost/flyback topology, up to 500 kHz, 96% duty cycle, 8-DIP. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","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":"Through Hole","Output Phases":"1","Package / Case":"8-DIP (0.300\\\", 7.62mm)","Product Status":"Active","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 (TJ)","Synchronous Rectifier":"No","Supplier Device Package":"8-Mini DIP","Voltage - Supply (Vcc/Vdd)":"7.6V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9000","priceTiers":[{"qty":1,"price":"$0.90000","currency":"USD"},{"qty":10,"price":"$0.80800","currency":"USD"},{"qty":50,"price":"$0.76700","currency":"USD"},{"qty":100,"price":"$0.63000","currency":"USD"},{"qty":250,"price":"$0.58892","currency":"USD"},{"qty":500,"price":"$0.52044","currency":"USD"},{"qty":1000,"price":"$0.41087","currency":"USD"},{"qty":2500,"price":"$0.38348","currency":"USD"},{"qty":5000,"price":"$0.36430","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a1e92e6bbc45d0f8e3020163c44f39c7.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/UC3843BN/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/UC3843BN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/UC3843BN when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T17:47:09.794Z","lastPublished":"2026-07-17T17:47:09.794Z","indexable":true}}