{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC3845ADG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC3845ADG4","canonicalUrl":"https://icboms.com/texas-instruments/UC3845ADG4","factsUrl":"https://icboms.com/api/mcp/products/UC3845ADG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC3845ADG4 current-mode PWM controller, 48% max duty cycle, up to 500 kHz switching, 7.6 V to 30 V supply, 14-SOIC package, tube.","salesMarkdown":"## Current-mode PWM controller for isolated and non-isolated supplies The Texas Instruments UC3845ADG4 is a current-mode PWM controller designed for step-up, step-down, and step-up/step-down topologies including boost, buck, flyback, and forward converters. It delivers a single transistor-driver output with a maximum duty cycle of 48%, a ceiling that sets the transformer reset time in flyback and forward designs. Switching frequency reaches up to 500 kHz, allowing the use of smaller magnetic components for compact power supplies. The supply range of 7.6 V to 30 V (Vcc/Vdd) covers common 12 V and 24 V industrial buses directly, eliminating the need for an extra pre-regulator.","metaTitle":"UC3845ADG4 PWM Controller, 48% Duty Cycle, Up to 500 kHz","metaDescription":"UC3845ADG4 current-mode PWM controller. 48% max duty cycle, up to 500 kHz switching, 7.6-30 V supply. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"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":"14-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"48%","Number of Outputs":"1","Serial Interfaces":"-","Base Product Number":"UC3845","Output Configuration":"Positive, Isolation Capable","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/167f8b16f2b0abe2748ff562a0463921.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/UC3845ADG4/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum duty cycle of UC3845ADG4?","answer":"The maximum duty cycle is 48%, which limits the on-time relative to the switching period. This is a key constraint for transformer-reset in flyback and forward converter designs."},{"question":"Can UC3845ADG4 be used in a boost converter?","answer":"Yes, the UC3845ADG4 supports boost topology as one of its listed functions (step-up). The 48% duty cycle cap applies, so the output-to-input voltage ratio in continuous conduction mode is limited to approximately 1/(1-D) = 1.92×."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC3845ADG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC3845ADG4 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}}