{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER17LD","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER17LD","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER17LD","factsUrl":"https://icboms.com/api/mcp/products/VIPER17LD","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPer™ plus series, VIPER17LD, offline flyback switching regulator, 10 W output, 800 V breakdown, 60 kHz, 16-SOIC package, surface mount, active production.","salesMarkdown":"## What the 800 V breakdown and 10 W rating mean for your offline supply The VIPER17LD integrates an 800 V avalanche-rugged MOSFET and a PWM controller in a single 16-SOIC package, targeting isolated flyback converters up to 10 W. The 800 V breakdown gives 200 V of margin above a typical 600 V bulk rail after reflected voltage and leakage spike — enough to avoid derating headaches in universal-input (85–265 VAC) designs. The 10 W power ceiling is tied to the SO-8 footprint's thermal impedance; a 4-layer board with a copper pour under the exposed pad pulls the junction temperature down at full load. ## Switching frequency, duty cycle, and startup behaviour Fixed 60 kHz switching frequency with a 70% maximum duty cycle — the 60 kHz keeps the transformer core size small while staying below the AM band for conducted emissions. The 14 V startup threshold and 8.5 V to 23.5 V Vcc range mean the IC starts cleanly from a bulk cap voltage and stays alive through the auxiliary winding once the converter is running. Fault protection includes current limiting, over-temperature, and over-voltage on the Vcc pin — the OVP latches off the gate drive if the auxiliary winding overcharges the supply rail. For volume pricing and lead time, submit an RFQ against your BOM quantity — the part is sourced to order through our distribution channel. ## Design-in checklist for the 16-SOIC package The 16-SOIC (0.154-inch width, 3.90 mm body) has an exposed paddle on the bottom — the datasheet recommends a thermal land on the PCB with at least 4 vias to a ground plane. The paddle is the drain node at 800 V, so the copper area must be sized for both thermal dissipation and creepage clearance to low-voltage pins.","metaTitle":"VIPER17LD – STMicroelectronics VIPer™ plus Flyback 10W 800V","metaDescription":"STMicroelectronics VIPER17LD offline flyback switcher: 10 W output, 800 V integrated MOSFET, 60 kHz, isolated topology, active production.","metaKeywords":null},"attributes":{"series":"VIPer™ plus","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","Series":"VIPer™ plus","Package":"Tube","Topology":"Flyback","Duty Cycle":"70%","Mounting Type":"Surface Mount","Power (Watts)":"10 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":"VIPER17","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":"$1.1500","priceTiers":[{"qty":1,"price":"$1.15000","currency":"USD"},{"qty":10,"price":"$1.02700","currency":"USD"},{"qty":25,"price":"$0.97480","currency":"USD"},{"qty":100,"price":"$0.80070","currency":"USD"},{"qty":250,"price":"$0.74852","currency":"USD"},{"qty":500,"price":"$0.66148","currency":"USD"},{"qty":1000,"price":"$0.52222","currency":"USD"},{"qty":2500,"price":"$0.48740","currency":"USD"},{"qty":5000,"price":"$0.46304","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0a971b40364933b9fa34cd604a963123.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER17LD/alternatives.json"},"ai":{"faq":[{"question":"Does VIPER17LD require an external MOSFET?","answer":"No. The 800 V avalanche-rated MOSFET is integrated inside the package. The VIPER17LD is a monolithic switcher — the external bill of materials is the transformer, input/output caps, rectifiers, and a few passives for the feedback loop."},{"question":"Can VIPER17LD be used for isolated flyback designs?","answer":"Yes. The output isolation is listed as Isolated, and the flyback topology is inherently isolated when the transformer has separate primary and secondary windings. The 60 kHz switching frequency and 70% duty cycle are well suited for a standard offline flyback with an optocoupler feedback path."},{"question":"What is the maximum output power of VIPER17LD?","answer":"The rated output power is 10 W. This is the continuous power at the nominal input voltage range. Derating applies at high line or elevated ambient temperature — the junction temperature limit of 150°C is the hard ceiling."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER17LD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER17LD 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}}