{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BM1050AF-GE2","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"BM1050AF-GE2","canonicalUrl":"https://icboms.com/rohm/BM1050AF-GE2","factsUrl":"https://icboms.com/api/mcp/products/BM1050AF-GE2","rawCanonicalId":null},"summary":{"shortDescription":"ROHM Semiconductor BM1050AF-GE2 offline flyback switching controller, 120kHz, 94% duty cycle, 8.5-24V Vcc, isolated output, 24-SOP (0.213\", 5.40mm Width), Surface Mount, Tape & Reel.","salesMarkdown":"## Flyback controller with 120 kHz switching and 94 % duty cycle The BM1050AF-GE2 from ROHM Semiconductor is an offline flyback switching controller designed for isolated power supplies. It operates at a fixed 120 kHz switching frequency with a maximum duty cycle of 94 %, which sets the transformer turns ratio and the output voltage regulation range for a given input bus. The controller requires an external power switch — the internal switch(s) field is marked No — so the MOSFET selection is a BOM decision that governs the peak current capability and the overall converter efficiency. ## Supply range, fault protection, and temperature grade The Vcc supply range of 8.5 V to 24 V covers the common bias rails from a 12 V auxiliary winding or a 24 V industrial bus. The 13.5 V start-up threshold ensures the controller begins switching once the bulk capacitor has charged above the undervoltage lockout release point. On-chip fault protection includes current limiting and over-voltage protection — the current limit cycle-by-cycle prevents transformer saturation during a shorted output, while the OVP monitors the output through the auxiliary winding and stops switching if the reflected voltage exceeds the threshold. The 24-SOP package with a 5.40 mm body width fits a standard SOIC footprint for reflow assembly.","metaTitle":"BM1050AF-GE2 ROHM Flyback Controller, 120kHz, 24-SOP","metaDescription":"ROHM BM1050AF-GE2 offline flyback controller, 120kHz switching, 8.5-24V Vcc, isolated output, current limiting & OVP. Active, ROHS3. Request quote.","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","Duty Cycle":"94%","Mounting Type":"Surface Mount","Package / Case":"24-SOIC (0.213\\\", 5.40mm Width)","lifecycle_stage":"eol_hot","Fault Protection":"Current Limiting, Over Voltage","Output Isolation":"Isolated","Internal Switch(s)":"No","Voltage - Start Up":"13.5 V","Frequency - Switching":"120kHz","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"24-SOP","Voltage - Supply (Vcc/Vdd)":"8.5V ~ 24V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.96","priceTiers":[{"qty":1,"price":"$2.96000","currency":"USD"},{"qty":10,"price":"$2.66300","currency":"USD"},{"qty":25,"price":"$2.51200","currency":"USD"},{"qty":100,"price":"$2.14040","currency":"USD"},{"qty":250,"price":"$2.00976","currency":"USD"},{"qty":500,"price":"$1.75854","currency":"USD"},{"qty":1000,"price":"$1.45708","currency":"USD"},{"qty":2000,"price":"$1.42200","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b5448ec26f8128bebbdca8bad85804ad.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BM1050AF-GE2/alternatives.json"},"ai":{"faq":[{"question":"What is BM1050AF-GE2's listed topology and switching frequency?","answer":"The BM1050AF-GE2 uses a flyback topology and switches at 120 kHz. The 94 % maximum duty cycle is typical for a flyback controller operating in continuous conduction mode at low line."},{"question":"What compliance documentation does ROHM Semiconductor provide for BM1050AF-GE2?","answer":"The BM1050AF-GE2 is ROHS3 compliant, meaning it meets the EU RoHS directive without any exempted substances. ROHM provides a certificate of compliance and material declaration upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/BM1050AF-GE2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/BM1050AF-GE2 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}}