{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UC2843AQDRHT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UC2843AQDRHT","canonicalUrl":"https://icboms.com/texas-instruments/UC2843AQDRHT","factsUrl":"https://icboms.com/api/mcp/products/UC2843AQDRHT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UC2843AQDRHT, Automotive AEC-Q100 current-mode PWM controller, up to 500 kHz switching, 96% max duty cycle, 7.6 V to 30 V supply, -40°C to 125°C, 14-SOIC package.","salesMarkdown":"## Current-mode PWM controller for automotive and industrial power supplies The Texas Instruments UC2843AQDRHT is a current-mode PWM controller designed for step-up (boost), buck, flyback, and forward converter topologies. It delivers a single transistor-driver output with a maximum duty cycle of 96%, allowing wide conversion ratios without pulse-skipping. The controller operates from a 7.6 V to 30 V supply and switches at frequencies up to 500 kHz, giving designers flexibility to shrink magnetics or optimize for efficiency. This part is AEC-Q100 qualified and rated over the -40°C to 125°C ambient temperature range, making it suitable for under-hood automotive electronics, industrial power supplies, and any environment where commercial-grade parts would derate. ## 96% duty cycle and 500 kHz switching — what they mean for the converter The 96% maximum duty cycle allows the controller to keep the switch on for nearly the whole period. The 500 kHz upper switching frequency lets you use smaller magnetics and output capacitors. ## Automotive-grade reliability with AEC-Q100 The UC2843AQDRHT carries AEC-Q100 qualification and an operating temperature range of -40°C to 125°C. The 14-SOIC package (3.90 mm width) is a standard footprint for automotive power controllers. ## Active lifecycle — no LTB risk for production programs The product status is listed as Active, meaning Texas Instruments continues to manufacture and support the UC2843AQDRHT. For automotive programs that run five to ten years, this is the right lifecycle stage — you can qualify the part into a new BOM without worrying about a sudden obsolescence notice. The AEC-Q100 qualification also means the part has passed the automotive-grade stress tests (pre- and post-cond, HTSL, TC, etc.), so requalification effort at the module level is minimal.","metaTitle":"UC2843AQDRHT PWM Controller, AEC-Q100, Up to 500 kHz","metaDescription":"UC2843AQDRHT current-mode PWM controller from TI, AEC-Q100 qualified, up to 500 kHz switching, 96% duty cycle, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"Automotive, AEC-Q100","Package":"Bulk","Function":"Step-Up","Topology":"Boost, Buck, Flyback, Forward","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"14-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Control Features":"Frequency Control","Duty Cycle (Max)":"96%","Number of Outputs":"1","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"Up to 500kHz","Operating Temperature":"-40°C ~ 125°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"14-SOIC","Voltage - Supply (Vcc/Vdd)":"7.6V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.31","stockQuantity":0,"priceTiers":[{"qty":229,"price":"$1.31000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/37c9410fec7cbd996a1f7c533b8da9cb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum switching frequency of UC2843AQDRHT?","answer":"The UC2843AQDRHT can switch at frequencies up to 500 kHz. This allows designers to use smaller magnetics and capacitors, though higher frequencies increase switching losses and require careful layout."},{"question":"Can UC2843AQDRHT be used in flyback converters?","answer":"Yes, the UC2843AQDRHT supports flyback topology as one of its listed topologies (boost, buck, flyback, forward). The 96% maximum duty cycle is especially useful in flyback designs that need a wide input-to-output voltage ratio."},{"question":"Does UC2843AQDRHT support clock sync?","answer":"No, the UC2843AQDRHT does not support clock synchronization. It is a free-running current-mode controller with frequency control via an external RC network."},{"question":"What is the equivalent of UC2843AQDRHT?","answer":"The UC2843AQDRHT is a current-mode PWM controller in the UCx84x family. A functional peer is the UCC2806DWTR, which also supports boost, flyback, and forward topologies but has a 50% maximum duty cycle and two outputs, and operates over -40°C to 85°C — not the full automotive temperature range. The LM5150QURUMRQ1 is another automotive-grade (AEC-Q100) boost controller with clock sync and a 2.3 MHz switching frequency, but it is a different topology fit (boost only). Neither is a direct pin-compatible replacement; verify the pinout and control features for your design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UC2843AQDRHT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UC2843AQDRHT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}