{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC3875DWP","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC3875DWP","canonicalUrl":"https://icboms.com/texas-instruments/UC3875DWP","factsUrl":"https://icboms.com/api/mcp/products/UC3875DWP","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC3875DWP, Full-Bridge PWM Controller, 1 MHz Switching, 9.5V-20V Supply, 28-SOIC (0.295\", 7.50mm Width), Surface Mount, 0°C to 70°C.","salesMarkdown":"## Full-bridge PWM controller for high-density power conversion The UC3875DWP is a full-bridge PWM controller from Texas Instruments designed for offline and DC-DC converters where transformer-coupled isolation and high efficiency are required. Its 1 MHz switching frequency allows the use of smaller magnetics and output capacitors, shrinking the power stage footprint. The controller integrates frequency control, soft-start, and synchronization for multi-phase or paralleled converter designs. ## 1 MHz switching — what it means for the transformer and filter At 1 MHz, the UC3875DWP drives the primary-side switches of a full-bridge topology. The 100% duty cycle capability supports the full-bridge phase-shifted modulation scheme. ## Supply range and start-up behaviour The controller operates from a 9.5 V to 20 V supply and has a start-up threshold of 10.75 V, meaning the bias rail must reach 10.75 V before the PWM outputs begin switching. Below that, the IC stays in undervoltage lockout. This matters for the auxiliary winding design: the bias winding needs to deliver at least 10.75 V during start-up and stay within 9.5 V to 20 V during steady-state operation. ## Protection and control features Current limiting fault protection is built in. Soft-start limits inrush during power-up, and the sync input lets multiple units operate at a common frequency. ## Package and mounting Housed in a 28-SOIC wide-body package (7.50 mm width), surface-mount for automated assembly. The 28-SOIC footprint is standard for this controller family, making PCB layout straightforward with existing land patterns. ## Lifecycle and sourcing The UC3875DWP is listed as Active on the Texas Instruments product line. No end-of-life notice or last-time-buy window is in effect.","metaTitle":"UC3875DWP Full-Bridge PWM Controller, 1 MHz, 28-SOIC","metaDescription":"UC3875DWP full-bridge PWM controller from Texas Instruments. 1 MHz switching, 9.5V-20V supply, 28-SOIC. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Topology":"Full-Bridge","Duty Cycle":"100%","Mounting Type":"Surface Mount","Package / Case":"28-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control, Soft Start, Sync","Fault Protection":"Current Limiting","Output Isolation":"Non-Isolated","Voltage - Start Up":"10.75 V","Frequency - Switching":"1MHz","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"28-SOIC","Voltage - Supply (Vcc/Vdd)":"9.5V ~ 20V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$13.64","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$13.64000","currency":"USD"},{"qty":10,"price":"$12.53500","currency":"USD"},{"qty":25,"price":"$12.01520","currency":"USD"},{"qty":100,"price":"$10.58620","currency":"USD"},{"qty":250,"price":"$10.06668","currency":"USD"},{"qty":500,"price":"$9.41720","currency":"USD"},{"qty":1000,"price":"$9.19050","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2057f22fb1b74ebb177a4369e4f41d68.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is UC3875DWP obsolete?","answer":"No discontinuation notice is in effect."},{"question":"What is the closest pin-compatible alternative to UC3875DWP?","answer":"The UC3875DWP is the surface-mount variant of the UC3875 family. The UC3875DW (without the P suffix) is the same 28-SOIC package and pinout; the UC3875N is the DIP-28 through-hole version. All share the same full-bridge control architecture and 1 MHz switching frequency."},{"question":"What is UC3875DWP's listed topology?","answer":"The topology is Full-Bridge, designed for phase-shifted, zero-voltage-switched converters in isolated DC-DC and offline power supplies."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC3875DWP","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC3875DWP 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}}