{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC3842AD8","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC3842AD8","canonicalUrl":"https://icboms.com/texas-instruments/UC3842AD8","factsUrl":"https://icboms.com/api/mcp/products/UC3842AD8","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC3842AD8, current-mode PWM controller, 8-SOIC package, 10V–30V supply, 96% max duty cycle, up to 500 kHz switching frequency, commercial temperature range 0°C to 70°C.","salesMarkdown":"## Current-mode PWM controller for isolated and non-isolated topologies Texas Instruments UC3842AD8 is a current-mode PWM controller supporting boost, buck, flyback, and forward converter topologies with a single transistor-driver output. The 10V to 30V supply range covers standard 12V and 24V bias rails found in industrial and telecom power supplies. The 96% maximum duty cycle allows high step-up ratios in boost and flyback designs without pulse-skipping at high line. Switching frequency reaches up to 500 kHz, enabling smaller transformer and inductor cores compared to lower-frequency controllers. ## Supply rail and temperature constraints for BOM fit For industrial or automotive environments, the LM5150QURUMRQ1 offers -40°C to 150°C operation and AEC-Q100 qualification, though it is a boost-only controller with 87% max duty cycle. Unlike the dual-output UCC2806DWTR which includes synchronous rectification and a 50% max duty cycle, the UC3842AD8 provides a single output with 96% duty — better suited for single-switch flyback and forward converters where high duty is needed. ## Active production — no end-of-life risk on this BOM line","metaTitle":"UC3842AD8 – TI Current-Mode PWM Controller, 8-SOIC, Active","metaDescription":"Texas Instruments UC3842AD8 current-mode PWM controller. 10V–30V supply, 96% max duty cycle, up to 500 kHz switching. Active lifecycle, 8-SOIC package.","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":"Tube","Function":"Step-Up, Step-Down, Step-Up/Step-Down","Topology":"Boost, Buck, Flyback, Forward","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":"Active","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"96%","Number of Outputs":"1","Serial Interfaces":"-","Base Product Number":"UC3842","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":"$1.3300","priceTiers":[{"qty":1,"price":"$1.33000","currency":"USD"},{"qty":10,"price":"$1.19100","currency":"USD"},{"qty":25,"price":"$1.13080","currency":"USD"},{"qty":100,"price":"$0.92890","currency":"USD"},{"qty":250,"price":"$0.86828","currency":"USD"},{"qty":500,"price":"$0.76734","currency":"USD"},{"qty":1000,"price":"$0.60579","currency":"USD"},{"qty":2500,"price":"$0.57150","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/536891bbf6907bbea70f31ce571541e7.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/UC3842AD8/alternatives.json"},"ai":{"faq":[{"question":"Is UC3842AD8 compatible with UC3843AD8?","answer":"The UC3842AD8 and UC3843AD8 share the same pinout and package, but differ in the undervoltage lockout thresholds. The UC3842AD8 has a 16V/10V start/stop threshold; the UC3843AD8 uses 8.4V/7.6V. Verify the bias rail voltage before substituting."},{"question":"Can UC3842AD8 be used in a flyback converter?","answer":"Yes. The UC3842AD8 supports flyback topology with a single transistor driver output and up to 96% duty cycle, making it suitable for single-switch flyback designs up to 500 kHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC3842AD8","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC3842AD8 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}}