{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER28LE","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER28LE","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER28LE","factsUrl":"https://icboms.com/api/mcp/products/VIPER28LE","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPer™ plus series VIPER28LE, isolated flyback converter with 800V avalanche-rugged MOSFET, 16W output, 60kHz switching, through-hole 10-SDIP package.","salesMarkdown":"## Obsolete 16 W flyback — what it means for a repair or replacement BOM The STMicroelectronics VIPER28LE is an 800 V avalanche-rugged monolithic flyback switcher from the VIPer plus series, integrating the PWM controller and power MOSFET in a single 10-SDIP through-hole package. It delivers 16 W in isolated flyback topology with 60 kHz fixed switching frequency, 80% duty cycle, and comprehensive fault protection including current limiting, over-temperature, over-voltage, and short-circuit on the output side. ## 800 V breakdown and 150°C junction — derating for industrial auxiliary supplies The 800 V drain-source breakdown voltage gives headroom for universal AC input (85–265 VAC) flyback designs with reflected voltage and leakage spike. The 8.5 V to 23.5 V Vcc supply range with a 14 V startup threshold is typical for bias windings in offline flybacks — the startup resistor can be sized for a few milliamps because the controller takes over from the auxiliary winding once running. ## Obsolete — last-time-buy and replacement reality The VIPer plus series included multiple pin-compatible options in the same 10-SDIP footprint — the VIPER28HN (with higher power rating) and VIPER28HD (with different protection thresholds) were common variants, but their own lifecycle status must be verified independently.","metaTitle":"STMicro VIPER28LE VIPer plus Flyback, 16W, 800V, Obsolete","metaDescription":"STMicroelectronics VIPER28LE is an 800V 16W isolated flyback switcher in VIPer plus series, 60kHz switching, 10-SDIP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","Series":"VIPer™ plus","Package":"Tube","Topology":"Flyback","Duty Cycle":"80%","Mounting Type":"Through Hole","Power (Watts)":"16 W","Package / Case":"10-SDIP (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":"VIPER28","Voltage - Breakdown":"800V","Frequency - Switching":"60kHz","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":"$71.2500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cac5bf8eadf282f6ee51b5279dfd6f4d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER28LE/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for VIPER28LE?","answer":"The same VIPer plus series included pin-compatible variants like VIPER28HN and VIPER28HD in the 10-SDIP package, but their own lifecycle and availability must be checked separately — they may also be obsolete. For a direct BOM replacement, evaluate the ST VIPer 0H or VIPer 01 series in DIP-7 or SO-16 packages, which require a PCB layout change."},{"question":"What is the maximum output power of VIPER28LE?","answer":"The VIPER28LE is rated for 16 W output power in isolated flyback topology, with the 800 V breakdown MOSFET and 60 kHz switching frequency. Actual achievable power depends on the transformer design, ambient temperature, and heatsinking — the 16 W rating assumes typical conditions within the 150°C junction temperature limit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER28LE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER28LE 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}}