{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UCC28085D","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UCC28085D","canonicalUrl":"https://icboms.com/texas-instruments/UCC28085D","factsUrl":"https://icboms.com/api/mcp/products/UCC28085D","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UCC28085D, Push-Pull PWM Controller, 50kHz ~ 1MHz Switching Frequency, 49% Duty Cycle, 8.3V ~ 15V Supply, 8-SOIC Surface Mount Package, Active, ROHS3 Compliant.","salesMarkdown":"## What the UCC28085D is and where it fits The Texas Instruments UCC28085D is a current-mode push-pull PWM controller designed for isolated offline and DC-DC power converters. It drives external power switches — no internal FETs — so you pair it with the MOSFETs or IGBTs that match your output power. The push-pull topology with a center-tapped transformer is a workhorse for telecom bricks, industrial bus converters, and any isolated supply where you want good transformer utilisation and low ripple. Switching frequency is programmable from 50 kHz up to 1 MHz via a single resistor, letting you trade off magnetics size against switching losses. The 49% maximum duty cycle per output keeps the transformer flux balanced and avoids saturation — a common gotcha if you try to push past 50% on a push-pull stage. Supply range is 8.3 V to 15 V (Vcc/Vdd), with a 12.5 V start-up threshold. That start-up voltage is typical for offline flyback or forward converters where the bias winding comes up after the main output stabilises. The controller includes current-limiting fault protection and a frequency control pin for synchronisation or soft-start tailoring. ## Package and handling — field-service friendly Housed in an 8-SOIC (0.154\", 3.90 mm width) surface-mount package, the UCC28085D is about as rework-friendly as SMD gets. No fine-pitch, no hidden leads — a standard hot-air station and tweezers will swap it on a board without a lot of fuss. No lab bench required for a field swap. ## Lifecycle and sourcing reality The UCC28085D is listed as Active with ROHS3 compliance. That means you can design it into a new BOM without worrying about a sudden discontinuation notice next quarter.","metaTitle":"UCC28085D Push-Pull PWM Controller, 50kHz–1MHz, 8-SOIC","metaDescription":"UCC28085D push-pull PWM controller from TI. Switching frequency 50kHz to 1MHz, 49% duty cycle, isolated output, 8.3V–15V supply. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Topology":"Push-Pull","Duty Cycle":"49%","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Fault Protection":"Current Limiting","Output Isolation":"Isolated","Internal Switch(s)":"No","Voltage - Start Up":"12.5 V","Frequency - Switching":"50kHz ~ 1MHz","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-SOIC","Voltage - Supply (Vcc/Vdd)":"8.3V ~ 15V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.27","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.27000","currency":"USD"},{"qty":10,"price":"$2.93700","currency":"USD"},{"qty":25,"price":"$2.77600","currency":"USD"},{"qty":100,"price":"$2.40600","currency":"USD"},{"qty":250,"price":"$2.28260","currency":"USD"},{"qty":500,"price":"$2.04818","currency":"USD"},{"qty":1000,"price":"$1.74600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c66dc9f92cbbdf419eefeda6ac058204.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum switching frequency of UCC28085D?","answer":"The UCC28085D switching frequency is programmable from 50 kHz to 1 MHz. The 1 MHz upper end lets you shrink magnetics significantly compared to a 100 kHz design, but watch the gate-drive losses if you are driving large FETs at that speed."},{"question":"How does UCC28085D compare to UCC28084D?","answer":"The UCC28084D is the same push-pull controller family but with a maximum duty cycle of 50% (versus 49% on the UCC28085D) and a slightly different undervoltage lockout threshold. The UCC28085D has a 12.5 V start-up and 8.3 V minimum operating voltage; the UCC28084D starts at 12.2 V and operates down to 8.0 V. Both are active, pin-compatible, and interchangeable in most designs — check the UVLO hysteresis if your bias rail is marginal."},{"question":"What is the typical application for UCC28085D?","answer":"Typical applications include isolated DC-DC converters using a push-pull topology — telecom power modules, industrial bus converters, battery chargers, and any offline supply where you need isolation and a regulated output. The 50 kHz to 1 MHz range suits both traditional ferrite designs and higher-density planar magnetics."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UCC28085D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UCC28085D 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}}