{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BM1R00147F-E2","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"BM1R00147F-E2","canonicalUrl":"https://icboms.com/rohm/BM1R00147F-E2","factsUrl":"https://icboms.com/api/mcp/products/BM1R00147F-E2","rawCanonicalId":null},"summary":{"shortDescription":"ROHM Semiconductor BM1R00147F- flyback switching controller, 8-SOIC surface mount, 2.7V-32V Vcc, 28V start-up, -40°C to 105°C, current/thermal/overvoltage protection, active.","salesMarkdown":"## Primary-side flyback controller — no internal switch The BM1R00147F-E2: The BM1R00147F- is a flyback switching controller from ROHM Semiconductor designed for isolated offline or DC-DC power supplies. It is a controller IC, not a monolithic switcher — an external MOSFET handles the power stage, giving the designer flexibility to size the switch for the output power target. The controller operates from a 2.7V to 32V Vcc supply and requires a 28V start-up threshold to begin switching. This wide bias range lets it run from a loosely regulated auxiliary winding or a dedicated bias rail without an external linear regulator. ## Fault protection set covers the common failure modes Three protection circuits are integrated: current limiting prevents the external MOSFET from exceeding the peak current setpoint; over-temperature protection shuts down the controller if the die exceeds the safe junction limit; over-voltage protection guards against output overshoot during load transients or feedback-loop faults. The output is galvanically isolated, confirming this is a primary-side controller — the secondary-side regulation loop typically uses an optocoupler or a secondary-side controller to close the feedback path across the isolation barrier. ## 8-SOIC package and industrial temperature range The standard SOIC-8 footprint is widely supported in PCB layout and assembly — no fine-pitch or special process requirements. Available in Tape & Reel (TR) for automated pick-and-place or Cut Tape (CT) for prototyping and small-batch builds.","metaTitle":"ROHM BM1R00147F-E2 Flyback Controller, 8-SOIC, Active","metaDescription":"ROHM BM1R00147F-E2 flyback switching controller in 8-SOIC. Active lifecycle, ROHS3 compliant. Fault protection: current limit, OTP, OVP. Vcc 2.7V-32V.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Topology":"Flyback","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Fault Protection":"Current Limiting, Over Temperature, Over Voltage","Output Isolation":"Isolated","Internal Switch(s)":"No","Voltage - Start Up":"28 V","Operating Temperature":"-40°C ~ 105°C","Supplier Device Package":"8-SOP","Voltage - Supply (Vcc/Vdd)":"2.7V ~ 32V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.12","stockQuantity":15,"priceTiers":[{"qty":1,"price":"$2.12000","currency":"USD"},{"qty":10,"price":"$1.90800","currency":"USD"},{"qty":25,"price":"$1.80040","currency":"USD"},{"qty":100,"price":"$1.53390","currency":"USD"},{"qty":250,"price":"$1.44024","currency":"USD"},{"qty":500,"price":"$1.26022","currency":"USD"},{"qty":1000,"price":"$1.04419","currency":"USD"},{"qty":2500,"price":"$0.97218","currency":"USD"},{"qty":5000,"price":"$0.93617","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/bd0d576dc0b8b43996094638e897591a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is BM1R00147F-'s listed topology?","answer":"The BM1R00147F- uses a flyback topology, making it suitable for isolated AC-DC and DC-DC power supply designs where galvanic isolation between input and output is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/BM1R00147F-E2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/BM1R00147F-E2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}