{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC3844AD8TRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC3844AD8TRG4","canonicalUrl":"https://icboms.com/texas-instruments/UC3844AD8TRG4","factsUrl":"https://icboms.com/api/mcp/products/UC3844AD8TRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC3844AD8TRG4 current-mode PWM controller, 8-SOIC, 48% max duty cycle, switching frequency up to 500 kHz, 10 V to 30 V supply, 0°C to 70°C operation.","salesMarkdown":"## Current-mode PWM controller for isolated supplies The UC3844AD8TRG4: It delivers a single transistor-driver output with a maximum duty cycle of 48%, making it suited for single-ended topologies where the off-time must exceed the on-time to reset the transformer core. The switching frequency reaches up to 500 kHz, allowing smaller magnetics at the cost of higher switching losses — a trade-off the designer budgets in the thermal analysis. The controller operates from a 10 V to 30 V supply rail (Vcc/Vdd), which covers the standard bias voltages for off-line AC-DC auxiliary windings and telecom bus converters. Availability is limited to independent-distributor surplus stock and broker-channel inventory.","metaTitle":"UC3844AD8TRG4 PWM Controller, 48% Duty Cycle, Up to 500 kHz","metaDescription":"Texas Instruments UC3844AD8TRG4 current-mode PWM controller. Boost, buck, flyback, forward topology. 8-SOIC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR)","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":"Obsolete","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"48%","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":"8-SOIC","Voltage - Supply (Vcc/Vdd)":"10V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/72463d7c352ecebe0441deb1ec8c852d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/UC3844AD8TRG4/alternatives.json"},"ai":{"faq":[{"question":"Is UC3844AD8TRG4 obsolete?","answer":"Yes, Texas Instruments has marked UC3844AD8TRG4 as obsolete. No last-time-buy window remains; supply is limited to surplus and broker-channel inventory."},{"question":"What is the replacement for UC3844AD8TRG4?","answer":"No official successor is listed by Texas Instruments for this specific variant. For a current-production pin-compatible alternative, evaluate other members of the UC3844 family in the same 8-SOIC package — confirm the duty-cycle and frequency specs match your design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC3844AD8TRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC3844AD8TRG4 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}}