{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC3846N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC3846N","canonicalUrl":"https://icboms.com/texas-instruments/UC3846N","factsUrl":"https://icboms.com/api/mcp/products/UC3846N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC3846N current-mode PWM controller, 500kHz switching frequency, 50% max duty cycle, 6.95V–40V supply, 16-DIP through-hole package, 0°C to 70°C operating temperature.","salesMarkdown":"## Current-mode PWM controller for push-pull and half-bridge stages The Texas Instruments UC3846N is a current-mode PWM controller for step-up and step-up/step-down topologies including boost, flyback, forward converter, half-bridge, and push-pull. It drives two transistor outputs with a maximum duty cycle of 50%. The switching frequency reaches 500 kHz. Control features include current limiting, enable, frequency control, and soft start — all accessible through the 16-pin DIP package. ## Supply range and temperature grade The controller operates from a 6.95 V to 40 V supply rail. The 0°C to 70°C temperature grade restricts this part to indoor, temperature-controlled environments. ## Through-hole package and assembly fit The 16-DIP (0.300\" width, 7.62 mm pitch) through-hole package is a legacy footprint that still sees use in prototyping, low-volume production, and repair boards where hand-soldering or socketing is preferred. If your BOM calls for a surface-mount controller, the function is different — this is a through-hole part, and the board layout must accommodate the DIP hole pattern. ## 50% duty cycle — what it means for topology choice The 50% maximum duty cycle is a hard limit set by the internal logic. In push-pull and half-bridge converters, this ensures equal volt-second balance across the transformer primary and prevents core saturation. For a boost or flyback operating at high input-to-output ratio, 50% duty may be insufficient — those designs typically need a controller with a higher duty ceiling. Check your conversion ratio before committing this part to a boost-only design. ## Sourcing and lifecycle The UC3846N carries an active lifecycle status and is ROHS3 compliant. Pricing and availability are confirmed at quote time through our independent distribution network — submit an RFQ for the exact quantity and lead time.","metaTitle":"UC3846N PWM Controller, 500kHz, 50% Duty Cycle, 16-DIP","metaDescription":"UC3846N current-mode PWM controller from Texas Instruments. 500kHz switching, 50% max duty, 6.95V-40V supply, 16-DIP. Active, RoHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Function":"Step-Up, Step-Up/Step-Down","Topology":"Boost, Flyback, Forward Converter, Half-Bridge, Push-Pull","Clock Sync":"Yes","Output Type":"Transistor Driver","Mounting Type":"Through Hole","Output Phases":"1","Package / Case":"16-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Frequency Control, Soft Start","Duty Cycle (Max)":"50%","Number of Outputs":"2","Output Configuration":"Positive","Frequency - Switching":"500kHz","Operating Temperature":"0°C ~ 70°C (TA)","Synchronous Rectifier":"Yes","Supplier Device Package":"16-PDIP","Voltage - Supply (Vcc/Vdd)":"6.95V ~ 40V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.15","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.15000","currency":"USD"},{"qty":10,"price":"$4.62900","currency":"USD"},{"qty":25,"price":"$4.37640","currency":"USD"},{"qty":100,"price":"$3.79290","currency":"USD"},{"qty":250,"price":"$3.59844","currency":"USD"},{"qty":500,"price":"$3.22886","currency":"USD"},{"qty":1000,"price":"$2.75250","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/368655a34305c4e331930629d8ba0153.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum switching frequency of UC3846N?","answer":"The UC3846N supports a maximum switching frequency of 500 kHz."},{"question":"What is the duty cycle of UC3846N?","answer":"The maximum duty cycle is 50%, which is a hard limit for push-pull and half-bridge topologies."},{"question":"Can UC3846N replace UC3845?","answer":"The UC3846N is a current-mode PWM controller with a 50% duty cycle limit and 500 kHz switching frequency, while the UC3845 family typically offers higher duty cycles (up to 50% for the UC3845 variant) but different pinout and control architecture. They are not direct pin-for-pin replacements; verify the pinout and control features against your design before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC3846N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC3846N when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}