{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IR21531","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IR21531","canonicalUrl":"https://icboms.com/infineon/IR21531","factsUrl":"https://icboms.com/api/mcp/products/IR21531","rawCanonicalId":null},"summary":{"shortDescription":"Infineon IR21531 half-bridge gate driver, N-channel MOSFET, RC input, synchronous, 10V-15.6V supply, 600V bootstrap, 8-DIP through hole, -40°C to 125°C.","salesMarkdown":"## Half-bridge gate driver with 600 V bootstrap — obsolete, but still in demand for legacy power stages The IR21531 from Infineon is a half-bridge gate driver designed to drive two N-channel MOSFETs in a synchronous half-bridge configuration. It integrates a 600 V bootstrap supply for the high-side driver, making it suited for off-line AC-DC converters, ballasts, and motor drives where the bus voltage reaches up to 600 V. The RC input circuit sets the oscillator frequency with external resistors and capacitors — no separate PWM controller needed. Rise and fall times of 80 ns and 45 ns respectively keep switching losses manageable at typical 20–100 kHz operating frequencies in a through-hole 8-DIP package. ## Supply and temperature envelope for the BOM The 10 V to 15.6 V supply range matches standard 12 V gate-drive bias rails. At 10 V the undervoltage lockout may be marginal with a heavily loaded rail — budget a 12 V regulated supply for reliable turn-on. The 8-PDIP package (0.300-inch body) is a through-hole footprint — expect manual or wave-solder assembly, no reflow profile. ## Obsolete — sourcing strategy for a discontinued driver The IR21531 carries an official obsolete lifecycle status. Infineon has ended production — no last-time-buy window remains open through the factory channel. Stock that surfaces in the independent market is genuine only when date codes and traceability match the original production runs.","metaTitle":"IR21531 half-bridge gate driver, 600 V bootstrap, obsolete","metaDescription":"IR21531 half-bridge gate driver for N-channel MOSFETs, 600 V bootstrap, 80ns/45ns rise/fall, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Infineon Technologies","Series":"-","Package":"Tube","Gate Type":"N-Channel MOSFET","Input Type":"RC Input Circuit","Channel Type":"Synchronous","Mounting Type":"Through Hole","Package / Case":"8-DIP (0.300\\\", 7.62mm)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Voltage - Supply":"10V ~ 15.6V","Number of Drivers":"2","Base Product Number":"IR21531","Driven Configuration":"Half-Bridge","Operating Temperature":"-40°C ~ 125°C (TJ)","Rise / Fall Time (Typ)":"80ns, 45ns","Supplier Device Package":"8-PDIP","Logic Voltage - VIL, VIH":"-","High Side Voltage - Max (Bootstrap)":"600 V","Current - Peak Output (Source, Sink)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.0300","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/IR21531/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy IR21531 and check current availability?","answer":"IR21531 is obsolete and no longer in factory production. Submit a request for the quantity needed; the supply position is evaluated per order."},{"question":"What is the replacement for IR21531?","answer":"No official replacement or pin-compatible successor is listed on the manufacturer record for the IR21531. A drop-in substitute is not confirmed — validate any alternative against the original half-bridge timing and bootstrap ratings before committing the BOM."},{"question":"Can IR21531 drive N-channel MOSFETs?","answer":"Yes, the IR21531 is specified for driving N-channel MOSFETs in a synchronous half-bridge configuration. The gate driver outputs are designed for the high-side and low-side N-channel devices with a bootstrap supply for the high side."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IR21531","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IR21531 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}}