{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISL6842IBZ","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"ISL6842IBZ","canonicalUrl":"https://icboms.com/renesas/ISL6842IBZ","factsUrl":"https://icboms.com/api/mcp/products/ISL6842IBZ","rawCanonicalId":null},"summary":{"shortDescription":"Renesas Electronics ISL6842IBZ current-mode PWM controller, Boost/Buck/Flyback topology, 96% duty cycle, 2 MHz switching, 8-SOIC surface mount package, tube.","salesMarkdown":"## What the topology list means for a repair bench The ISL6842IBZ is a current-mode PWM controller that handles boost, buck, and flyback topologies — the three workhorses of offline and DC-DC power conversion. When a board comes in with a dead rail and the scorch mark points to the controller, this part covers the most common converter architectures without needing a separate IC for each. It drives an external switch (MOSFET or IGBT), so the failure signature is often a shorted gate driver output or a blown external FET, not the controller itself. The 8-SOIC package is a standard footprint that matches many existing layouts, making it a straightforward swap on a rework station. ## Switching frequency and duty cycle — the magnetics story Switching at up to 2 MHz lets you shrink the transformer or inductor core — a flyback converter running at 1.8 MHz uses a much smaller EE-core than one running at 100 kHz. The 96% maximum duty cycle means the controller can maintain regulation even when the input voltage is close to the output, which matters in boost converters where the output-to-input ratio is tight. The frequency control feature allows external synchronization or frequency foldback for EMI management — useful when the board must pass CISPR 22 or similar emissions limits without a bulky input filter. ## Supply rails and start-up sequencing The Vcc range of 8.8 V to 18 V covers standard bias rails from a 12 V auxiliary supply or a bootstrap winding. The 14.3 V start-up threshold means the controller stays off until the bias rail is fully established, preventing partial-power glitches on the output during power-up. With current-limiting fault protection, the controller shuts down the gate drive when the sense resistor voltage exceeds the threshold — this protects both the external FET and the load from a shorted secondary or a saturated transformer core.","metaTitle":"ISL6842IBZ Renesas PWM Controller, Boost/Buck/Flyback","metaDescription":"ISL6842IBZ current-mode PWM controller from Renesas. Supports boost, buck, and flyback topologies up to 2 MHz.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Topology":"Boost, Buck, Flyback","Duty Cycle":"96%","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Fault Protection":"Current Limiting","Output Isolation":"Isolated","Internal Switch(s)":"No","Voltage - Start Up":"14.3 V","Frequency - Switching":"Up to 2MHz","Operating Temperature":"-40°C ~ 105°C (TA)","Supplier Device Package":"8-SOIC","Voltage - Supply (Vcc/Vdd)":"8.8V ~ 18V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.43","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.43000","currency":"USD"},{"qty":10,"price":"$3.07800","currency":"USD"},{"qty":25,"price":"$2.90960","currency":"USD"},{"qty":100,"price":"$2.52170","currency":"USD"},{"qty":250,"price":"$2.39240","currency":"USD"},{"qty":500,"price":"$2.14672","currency":"USD"},{"qty":1000,"price":"$2.03740","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1a45a549820c190bffc818e3de94b9ba.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What topologies does the ISL6842IBZ support?","answer":"It supports boost, buck, and flyback topologies. This covers the majority of isolated and non-isolated offline power supplies, as well as DC-DC converters in industrial and telecom gear."},{"question":"Does the ISL6842IBZ have an internal switch?","answer":"No, it is a controller IC that drives an external MOSFET or IGBT. The external switch allows you to scale the power level by choosing a FET with the appropriate Rds(on) and current rating for your load."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/ISL6842IBZ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/ISL6842IBZ 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}}