{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER37LD","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER37LD","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER37LD","factsUrl":"https://icboms.com/api/mcp/products/VIPER37LD","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPer™ plus series, VIPER37LD offline flyback converter, 800V breakdown, 20W output, 60kHz switching, 16-SOIC package, surface mount, -40°C to 150°C junction temperature.","salesMarkdown":"## 20 W flyback converter with 800 V avalanche-rugged MOSFET The STMicroelectronics VIPER37LD is an offline flyback converter from the VIPer™ plus series, integrating an 800 V avalanche-rugged power MOSFET and PWM controller in a 16-SOIC package. It delivers up to 20 W in an isolated flyback topology, switching at 60 kHz. The 800 V breakdown voltage allows direct connection to rectified mains up to 265 VAC with margin for line surges, while the 60 kHz switching frequency keeps the transformer size manageable without excessive core losses. Built-in fault protection includes current limiting, over-temperature shutdown, and over-voltage protection — covering the common failure modes in an offline supply without external supervisory ICs. The 14 V startup voltage and 8.5 V to 23.5 V supply range match standard auxiliary winding designs. For new designs, this removes the obsolescence risk that haunts older offline converter parts.","metaTitle":"STMicroelectronics VIPER37LD offline flyback converter, 800V","metaDescription":"VIPER37LD offline flyback converter from STMicroelectronics VIPer™ plus series. 800V avalanche-rugged MOSFET, 20W output, 60kHz switching, active production.","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":"Tube","Topology":"Flyback","Duty Cycle":"80%","Mounting Type":"Surface Mount","Power (Watts)":"20 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","Output Isolation":"Isolated","Internal Switch(s)":"Yes","Voltage - Start Up":"14 V","Base Product Number":"VIPER37","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":"$10.0600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d9d552d34ede2c4520f8b1ed5651863f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER37LD/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum power rating of VIPER37LD?","answer":"The VIPER37LD is rated for 20 W output in a flyback topology."},{"question":"Is VIPER37LD isolated?","answer":"Yes, the VIPER37LD supports isolated output designs — the output isolation is listed as 'Isolated', meaning the feedback loop and secondary side can be galvanically separated from the primary."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER37LD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER37LD 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}}