{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL3843BDR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL3843BDR","canonicalUrl":"https://icboms.com/texas-instruments/TL3843BDR","factsUrl":"https://icboms.com/api/mcp/products/TL3843BDR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL3843BDR PWM controller IC, multi-topology boost/flyback/forward, 14-SOIC surface mount, switching frequency up to 500 kHz, 96% max duty cycle, 7.6 V to 30 V supply.","salesMarkdown":"The TL3843BDR: ROHS3 compliant — no exemption issues for EU or California market entry. ## Switching frequency and duty cycle ceiling Switching frequency reaches up to 500 kHz — the upper end suits compact magnetics in flyback and forward converters, though the 96% maximum duty cycle is the more useful spec for boost designs. At 96% duty, the off-time is only 4% of the period, which means the transformer reset or inductor discharge time is tight; the controller can sustain a high step-up ratio without pulse-skipping, but the secondary-side catch diode must handle the short conduction interval. The supply voltage range runs from 7.6 V to 30 V (Vcc/Vdd), covering standard 12 V and 24 V industrial rails with margin for ripple. Below 7.6 V the undervoltage lockout (UVLO) keeps the output off — nominal is not absolute max, but the 30 V ceiling is the abs-max at the Vcc pin per the datasheet's absolute-maximum ratings table. ## Multi-topology controller — one BOM position This part is intended for indoor, bench, or controlled-environment equipment. For automotive or extended industrial ambient, look at the -40°C to 125°C rated siblings in the TL384x family. ## 14-SOIC package — board integration No exposed thermal pad — the junction-to-ambient thermal resistance relies on the copper area of the SOIC footprint. Standard rework profile with hot-air; no special bake-out required for moisture sensitivity level (MSL) typical of SOIC packages. The cut tape option is convenient for bench builds without committing to full reel quantities.","metaTitle":"TL3843BDR Texas Instruments PWM Controller, 14-SOIC, Active","metaDescription":"Texas Instruments TL3843BDR PWM controller IC in 14-SOIC. Switching frequency up to 500 kHz, 96% duty cycle, boost/flyback/forward topology.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Up, Step-Up/Step-Down","Topology":"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)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"96%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"Up to 500kHz","Operating Temperature":"0°C ~ 70°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"14-SOIC","Voltage - Supply (Vcc/Vdd)":"7.6V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.83","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.83000","currency":"USD"},{"qty":10,"price":"$0.73100","currency":"USD"},{"qty":25,"price":"$0.68680","currency":"USD"},{"qty":100,"price":"$0.56050","currency":"USD"},{"qty":250,"price":"$0.52060","currency":"USD"},{"qty":500,"price":"$0.44308","currency":"USD"},{"qty":1000,"price":"$0.35446","currency":"USD"},{"qty":2500,"price":"$0.32123","currency":"USD"},{"qty":5000,"price":"$0.31350","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f450aa6242c0dd363ceebc87ffbffd81.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What topologies does TL3843BDR support?","answer":"Boost, flyback, and forward topologies. The single transistor driver output with 96% max duty cycle makes it well-suited for high step-up boost and single-switch flyback converters."},{"question":"Where can I buy TL3843BDR and how is it quoted?","answer":"Sourced through independent distribution channels. No stock-holding claim; lead time varies by lot."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL3843BDR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL3843BDR 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}}