{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC2844AN","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC2844AN","canonicalUrl":"https://icboms.com/texas-instruments/UC2844AN","factsUrl":"https://icboms.com/api/mcp/products/UC2844AN","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC2844AN current-mode PWM controller, 8-DIP (0.300\", 7.62 mm) through-hole package, 48% max duty cycle, up to 500 kHz switching, 10 V to 30 V supply, -40°C to 85°C operating temperature.","salesMarkdown":"## Current-mode PWM controller in an 8-pin DIP The Texas Instruments UC2844AN is a current-mode PWM controller in the legacy 8-DIP through-hole package. It steps up, steps down, or steps up/step-down across boost, buck, flyback, and forward topologies — the function and topology set list covers the three main non-isolated and isolated converter architectures. Maximum duty cycle is 48% with a switching frequency up to 500 kHz. The 48% ceiling is typical for current-mode controllers in flyback and forward converters — it prevents transformer saturation during start-up and transient overload by limiting the on-time below 50%. Supply voltage range is 10 V to 30 V on the Vcc pin. This wide input window suits offline flyback bias windings (typically 12-18 V) or an industrial 24 V bus-derived rail. The undervoltage lockout thresholds are set internally for the UC2844 variant — the controller starts at 16 V and shuts down at 10 V, matching the 10 V minimum in the supply spec. ## Single-output transistor driver with isolation capability The output stage is a single totem-pole transistor driver — not a gate-drive integrated FET. It sources and sinks the gate charge of an external power MOSFET or IGBT through a series resistor that sets the turn-on/turn-off speed. The positive output configuration and isolation-capable flag mean the controller can drive a pulse transformer for primary-side referenced gate drive in isolated topologies like flyback and forward. No clock sync, no synchronous rectifier control — the oscillator runs free at the frequency set by the external RT/CT network. The Frequency Control feature in the spec table refers to the programmable oscillator, not an external synchronization input. For designs requiring multi-phase interleaving or external clock alignment, a different controller family is needed. The 8-DIP package (0.300\" width, 7.62 mm row spacing) is a through-hole footprint that has been in production for decades. It is hand-solderable and prototyped on perfboard, but the 0.100\" pin pitch constrains the layout of the high-frequency power loop — the sense resistor and output drive trace should be kept short to minimize parasitic inductance that degrades current-sense stability above 200 kHz. ## Active production, ROHS3 compliant, industrial temperature range Lifecycle status is Active per the manufacturer — no end-of-life notice, no last-time-buy window. ROHS3 compliant (fully lead-free) with no exemption conflicts for EU or UKCA markets. The UC2844AN is sourced to order through independent and authorized distribution. The 8-DIP tube packaging is standard for through-hole ICs — no reel or tape options exist for this package variant.","metaTitle":"Texas Instruments UC2844AN PWM Controller, 8-DIP","metaDescription":"Texas Instruments UC2844AN current-mode PWM controller in 8-DIP through-hole package. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"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":"Through Hole","Output Phases":"1","Package / Case":"8-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"48%","Number of Outputs":"1","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"Up to 500kHz","Operating Temperature":"-40°C ~ 85°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"8-PDIP","Voltage - Supply (Vcc/Vdd)":"10V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.60000","currency":"USD"},{"qty":10,"price":"$1.43200","currency":"USD"},{"qty":25,"price":"$1.35920","currency":"USD"},{"qty":100,"price":"$1.11660","currency":"USD"},{"qty":250,"price":"$1.04380","currency":"USD"},{"qty":500,"price":"$0.92242","currency":"USD"},{"qty":1000,"price":"$0.72822","currency":"USD"},{"qty":2500,"price":"$0.68700","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/536891bbf6907bbea70f31ce571541e7.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC2844AN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC2844AN 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}}