{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER20-E","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER20-E","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER20-E","factsUrl":"https://icboms.com/api/mcp/products/VIPER20-E","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPER™ series, VIPER20-E, flyback switching regulator, 20 W output, 620 V breakdown, up to 200 kHz switching frequency, Pentawatt-5 HV (bent and staggered leads) surface-mount package.","salesMarkdown":"## Flyback regulator for off-line supplies — 20 W ceiling The STMicroelectronics VIPER20-E is a monolithic flyback switching regulator integrating the PWM controller and a 620 V power MOSFET in a single Pentawatt-5 HV package. It delivers up to 20 W of isolated output power, targeting auxiliary power supplies in appliances, industrial controls, and AC-DC converters where board space is tight. ## 620 V breakdown and 200 kHz switching The 620 V breakdown voltage gives enough headroom for universal AC input (85–265 VAC) rectified to a DC bus that peaks near 375 V. The switching frequency runs up to 200 kHz, which shrinks the transformer and output filter but pushes the EMI filter design — expect to budget for a common-mode choke and Y-capacitors at the input. Built-in current limiting and over-temperature protection reduce the external component count. The 8 V to 15 V supply range on Vcc/Vdd lets the auxiliary winding self-bias once the converter starts, with an 11 V startup threshold. ## Pentawatt-5 HV — surface mount with staggered leads The Pentawatt-5 HV package has bent and staggered leads, giving a surface-mount footprint while keeping the thermal and creepage characteristics of a through-hole power package.","metaTitle":"ST VIPER20-E Flyback Converter, 20W, 620V, Pentawatt-5 HV","metaDescription":"Obsolete ST VIPER20-E flyback switching regulator, 20W output, 620V breakdown, up to 200kHz. Pentawatt-5 HV package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","Series":"VIPER™","Package":"Tube","Topology":"Flyback","Duty Cycle":"-","Mounting Type":"Surface Mount","Power (Watts)":"20 W","Package / Case":"Pentawatt-5 HV (Bent and Staggered Leads)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Control Features":"-","Fault Protection":"Current Limiting, Over Temperature","Output Isolation":"Isolated","Internal Switch(s)":"Yes","Voltage - Start Up":"11 V","Base Product Number":"VIPER20","Voltage - Breakdown":"620V","Frequency - Switching":"Up to 200kHz","Operating Temperature":"-","Supplier Device Package":"5-PENTAWATT","Voltage - Supply (Vcc/Vdd)":"8V ~ 15V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a6f978a777061d663c8495d0b5ceecb7.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER20-E/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy VIPER20-E and check stock?","answer":"VIPER20-E is obsolete from STMicroelectronics."},{"question":"Is VIPER20-E obsolete?","answer":"Yes, STMicroelectronics lists the VIPER20-E as obsolete. No direct replacement part number has been announced. For new designs, consider the current VIPERXX series parts; for existing BOMs, the part is available through the surplus and broker channel."},{"question":"What is the output power of VIPER20-E?","answer":"The VIPER20-E is rated for 20 W output in a flyback topology. This is the continuous power ceiling under typical conditions; actual deliverable power depends on input voltage, ambient temperature, and the thermal management of the Pentawatt-5 HV package on the PCB."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER20-E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER20-E 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}}