{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER28LDTR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER28LDTR","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER28LDTR","factsUrl":"https://icboms.com/api/mcp/products/VIPER28LDTR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPer™ plus series, VIPER28LDTR, flyback PWM switcher with 800 V avalanche-rugged MOSFET, 16 W output power, 60 kHz fixed switching frequency, 80% duty cycle, 16-SOIC package, surface mount.","salesMarkdown":"## 16 W flyback with an 800 V integrated MOSFET The STMicroelectronics VIPER28LDTR is a monolithic flyback switcher from the VIPer™ plus family that integrates an 800 V avalanche-rugged power MOSFET and a PWM controller in a single 16-SOIC package. It delivers up to 16 W of isolated output power at a fixed 60 kHz switching frequency with an 80% maximum duty cycle. ## Built-in fault protection reduces external BOM The controller includes current limiting, over-temperature, over-voltage, and short-circuit protection — four fault responses that eliminate the need for discrete sense resistors and comparators on the primary side. Start-up voltage is 14 V, and the Vcc operating range spans 8.5 V to 23.5 V, giving headroom for auxiliary winding regulation across line and load.","metaTitle":"VIPER28LDTR VIPer™ plus Flyback PWM, 800V, 16 W, 60 kHz","metaDescription":"VIPER28LDTR from STMicroelectronics — 16 W flyback switcher with 800 V avalanche-rugged MOSFET, 60 kHz fixed frequency, SOIC-16.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","Series":"VIPer™ plus","Package":"Tape & Reel (TR) Cut Tape (CT)","Topology":"Flyback","Duty Cycle":"80%","Mounting Type":"Surface Mount","Power (Watts)":"16 W","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Fault Protection":"Current Limiting, Over Temperature, Over Voltage, Short Circuit","Output Isolation":"Isolated","Internal Switch(s)":"Yes","Voltage - Start Up":"14 V","Base Product Number":"VIPER28","Voltage - Breakdown":"800V","Frequency - Switching":"60kHz","Operating Temperature":"-40°C ~ 150°C (TJ)","Supplier Device Package":"16-SO","Voltage - Supply (Vcc/Vdd)":"8.5V ~ 23.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6222","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e0a19c5dbb3cef73062225c3c9e63431.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER28LDTR/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum output power of VIPER28LDTR?","answer":"The rated output power is 16 W in a flyback topology. Actual achievable power depends on input voltage range, ambient temperature, and thermal management in the final design."},{"question":"VIPER28LDTR vs VIPER27L — what is the difference?","answer":"Both are VIPer™ plus flyback switchers. The VIPER28LDTR integrates an 800 V MOSFET, while the VIPER27L uses a 700 V device. The higher breakdown voltage on the VIPER28LDTR provides additional margin for universal AC input (85–265 VAC) and reduces derating for line transients."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER28LDTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER28LDTR 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}}