{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER0PHD","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER0PHD","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER0PHD","factsUrl":"https://icboms.com/api/mcp/products/VIPER0PHD","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPer™ plus, VIPER0PHD, off-line switching regulator, 800V breakdown, 12W output, 120kHz switching, buck/buck-boost/flyback topology, 16-SOIC package, -40°C to 150°C junction temperature.","salesMarkdown":"## 800 V breakdown, 12 W output — the off-line workhorse The STMicroelectronics VIPER0PHD is a monolithic off-line switching regulator from the VIPer™ plus family, integrating a power MOSFET with an 800 V breakdown voltage and a PWM controller in a single 16-SOIC package. It delivers up to 12 W across buck, buck-boost, and flyback topologies, making it a fit for auxiliary power supplies, appliance control boards, and industrial bias rails where a compact, single-chip solution is preferred over a discrete controller-plus-MOSFET pair. ## Switching frequency and topology flexibility The fixed 120 kHz switching frequency is a known value for transformer design and EMI filter sizing — no external timing resistor or capacitor needed. The part supports output isolation as either isolated or non-isolated, so the same BOM line can serve a flyback converter with an optocoupler feedback loop or a simple buck regulator for a non-isolated bias rail. Duty cycle maxes out at 80%, which is typical for a current-mode controller and sets the minimum input voltage at which the output stays regulated. The 4.5 V to 30 V Vcc supply range lets the IC be powered from an auxiliary winding or a regulated bias rail without an extra linear regulator. On-chip fault protection covers current limiting, over-load, over-temperature, and short-circuit — four protection mechanisms that reduce external sense-resistor count and simplify the protection loop.","metaTitle":"VIPER0PHD STMicroelectronics VIPer™ plus Off-Line Converter","metaDescription":"STMicroelectronics VIPER0PHD VIPer™ plus off-line switching regulator. 800V breakdown, 12W output, 120kHz, buck/buck-boost/flyback. Active lifecycle.","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":"Buck, Buck-Boost, Flyback","Duty Cycle":"80%","Mounting Type":"Surface Mount","Power (Watts)":"12 W","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Fault Protection":"Current Limiting, Over Load, Over Temperature, Short Circuit","Output Isolation":"Either","Internal Switch(s)":"Yes","Voltage - Start Up":"8 V","Base Product Number":"VIPER0","Voltage - Breakdown":"800V","Frequency - Switching":"120kHz","Operating Temperature":"-40°C ~ 150°C (TJ)","Supplier Device Package":"16-SO","Voltage - Supply (Vcc/Vdd)":"4.5V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6657","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ccae250ee1a12751689f39365218b389.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER0PHD/alternatives.json"},"ai":{"faq":[{"question":"Can VIPER0PHD be used in a flyback converter design?","answer":"Yes. The VIPER0PHD supports flyback topology directly, with output isolation configurable as either isolated or non-isolated. The integrated 800 V MOSFET handles the reflected voltage plus leakage spike in a typical universal-input flyback, and the 120 kHz switching frequency is a standard starting point for transformer design."},{"question":"What is the switching frequency of VIPER0PHD?","answer":"The switching frequency is fixed at 120 kHz. No external timing components are required — the oscillator is internal to the controller."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER0PHD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER0PHD 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}}