{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER35HE","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER35HE","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER35HE","factsUrl":"https://icboms.com/api/mcp/products/VIPER35HE","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPER35HE offline flyback converter, 22 W output, 800 V breakdown, 225 kHz switching, isolated topology, through-hole 10-DIP package, -40°C to 150°C junction temperature.","salesMarkdown":"## Offline flyback converter with integrated 800 V MOSFET The STMicroelectronics VIPER35HE is a monolithic offline flyback converter that integrates a 800 V avalanche-rugged power MOSFET with a PWM controller in a single through-hole package. ## 22 W output — sizing the supply rail The 22 W power rating is the continuous output ceiling for an isolated flyback design at nominal input. The 800 V breakdown handles universal AC input plus reflected voltage and leakage inductance spikes. ## Protection set and operating range Built-in fault protections cover current limiting, over-temperature, over-voltage, and short circuit — no external comparator or supervisor needed. The 8.5 V to 23.5 V Vcc range and 14 V start-up threshold are standard for auxiliary windings in flyback converters. The VIPER35HE is marked obsolete by STMicroelectronics. For new designs, consider current ST families, but verify pinout and compensation differences.","metaTitle":"VIPER35HE 22 W Flyback Converter, 800 V, 225 kHz, Obsolete","metaDescription":"STMicroelectronics VIPER35HE offline flyback converter: 22 W output, 800 V avalanche-rugged MOSFET, 225 kHz switching, isolated topology.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tube","Topology":"Flyback","Duty Cycle":"-","Mounting Type":"Through Hole","Power (Watts)":"22 W","Package / Case":"10-DIP (0.300\\\", 7.62mm)","Product Status":"Obsolete","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":"VIPER35","Voltage - Breakdown":"800V","Frequency - Switching":"225kHz","Operating Temperature":"-40°C~150°C(TJ)","Supplier Device Package":"10-SDIP","Voltage - Supply (Vcc/Vdd)":"8.5V ~ 23.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cb6e35b910edac381df5b08dea584911.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER35HE/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum output power of VIPER35HE?","answer":"The VIPER35HE is rated for 22 W continuous output power in an isolated flyback topology. This is the maximum at nominal input and 25°C ambient; derate for higher ambient temperature and transformer coupling losses."},{"question":"Is VIPER35HE compatible with isolated flyback designs?","answer":"Yes, the VIPER35HE is designed for isolated flyback topologies. The output isolation is built into the transformer design — the controller side is primary-referenced, and the secondary side is isolated per the transformer's winding isolation rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER35HE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER35HE 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}}