{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER38HDTR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER38HDTR","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER38HDTR","factsUrl":"https://icboms.com/api/mcp/products/VIPER38HDTR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPer™ plus series, VIPER38HDTR, offline flyback switcher, 800V breakdown, 115kHz fixed frequency, 20W output, 16-SOIC package, surface mount, active production.","salesMarkdown":"## Flyback switcher with integrated 800V MOSFET The VIPER38HDTR is an offline flyback switcher from STMicroelectronics' VIPer™ plus series, integrating the power MOSFET and controller in a single 16-SOIC package. It delivers up to 20 W of isolated output power from a universal AC input. The 800 V breakdown rating on the integrated MOSFET provides substantial margin for universal AC line input (85–265 VAC) flyback designs, where reflected voltage and leakage inductance spikes can stress the switch beyond the nominal rail. Switching at a fixed 115 kHz, the transformer core size is smaller than a 65 kHz design, but the EMI filter must be designed for the fundamental and its harmonics. The fixed frequency simplifies filter tuning versus a quasi-resonant or variable-frequency controller. ## Protection set reduces external BOM On-chip fault protection covers current limiting, over-temperature, over-voltage, and short-circuit conditions. This built-in set eliminates the need for external sense resistors or optocoupler-based protection in many designs, shrinking the BOM count. The start-up voltage is 14 V, and the supply range (Vcc) spans 8.5 V to 23.5 V, accommodating a wide auxiliary winding output without an external LDO. ## Active production in 16-SOIC package It is supplied in tape and reel (TR) and cut tape (CT) options for the 16-SOIC (0.154-inch width) package, suitable for reflow assembly. ROHS3 compliant and lead-free per the L* entry, the part meets current environmental directives for commercial and industrial equipment.","metaTitle":"VIPER38HDTR Offline Flyback Switcher 20W 800V 115kHz","metaDescription":"VIPER38HDTR offline flyback switcher from STMicroelectronics VIPer™ plus series. 800V breakdown, 115kHz fixed frequency, 20W output, 16-SOIC.","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":"Tape & Reel (TR) Cut Tape (CT)","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, Short Circuit","Output Isolation":"Isolated","Internal Switch(s)":"Yes","Voltage - Start Up":"14 V","Base Product Number":"VIPER38","Voltage - Breakdown":"800V","Frequency - Switching":"115kHz","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":"$1.6500","priceTiers":[{"qty":1,"price":"$1.65000","currency":"USD"},{"qty":10,"price":"$1.47100","currency":"USD"},{"qty":25,"price":"$1.39640","currency":"USD"},{"qty":100,"price":"$1.14710","currency":"USD"},{"qty":250,"price":"$1.07228","currency":"USD"},{"qty":500,"price":"$0.94760","currency":"USD"},{"qty":1000,"price":"$0.74811","currency":"USD"},{"qty":2500,"price":"$0.69823","currency":"USD"},{"qty":5000,"price":"$0.66332","currency":"USD"},{"qty":12500,"price":"$0.63838","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a696cf0acaadb5ba91932b998396a995.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER38HDTR/alternatives.json"},"ai":{"faq":[{"question":"Is there a pin-compatible alternative to VIPER38HDTR?","answer":"Within the VIPer™ plus series, the VIPER38HDTR shares the same package and pinout as other VIPER38 variants (e.g., VIPER38LDTR). The key differences are in the power rating and protection thresholds. Confirm the specific variant's ratings against your load requirements before substituting."},{"question":"What fault protection features does the VIPER38HDTR include?","answer":"The device integrates current limiting, over-temperature shutdown, over-voltage protection, and short-circuit protection on-chip, reducing the need for external protection circuitry."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER38HDTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER38HDTR 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}}