{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP8545SQE/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP8545SQE-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP8545SQE-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP8545SQE%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP8545SQE/NOPB DC DC Regulator LED driver, Step-Up (Boost) topology, 6 outputs, 50mA per channel, PWM dimming, 40V output, 24-WFQFN Exposed Pad, Tape & Reel.","salesMarkdown":"## Boost LED driver for multi-string backlights The LP8545SQE/NOPB is a DC-DC boost regulator from Texas Instruments, purpose-built for backlight applications. It integrates six regulated current sinks, each rated for 50 mA, and a built-in switching FET for the boost stage. The boost topology steps the input voltage up to a 40 V maximum output rail, which feeds the LED strings. PWM dimming is handled on-chip, so the host controller sends a duty-cycle signal rather than switching the output rail directly. ## Switching frequency options shape the inductor and board The LP8545SQE/NOPB offers four selectable switching frequencies: 156 kHz, 312 kHz, 625 kHz, and 1.25 MHz. A lower frequency reduces switching losses but demands a larger inductor; 1.25 MHz shrinks the magnetics but increases FET switching loss and EMI filtering effort. The input supply range spans 2.7 V to 22 V, so it works off a single lithium-ion cell, a 5 V USB rail, or a 12 V backlight supply. The 40 V output ceiling supports up to ten series LEDs per string, depending on the forward voltage of the chosen part. ## Package and thermal considerations for the layout The operating temperature range is -30°C to 85°C ambient, covering most indoor and automotive-cabin backlight applications. Surface-mount assembly with a WQFN package means the board house needs a stencil aperture matched to the 0.5 mm pitch pads. ## Active lifecycle and compliance baseline The part is RoHS3 compliant. No REACH or UL documentation is carried in the available records, so confirm with the TI datasheet if those certifications are required for your end-equipment compliance file.","metaTitle":"LP8545SQE/NOPB TI LED Driver, Boost, 6-Ch, 50mA, 24-WQFN","metaDescription":"Texas Instruments LP8545SQE/NOPB DC-DC boost LED driver, 6 outputs at 50mA each, PWM dimming, 40V max output, active production, RoHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"DC DC Regulator","Dimming":"PWM","Package":"Tape & Reel (TR); Cut Tape (CT)","Topology":"Step-Up (Boost)","Frequency":"156kHz, 312kHz, 625kHz, 1250kHz","Applications":"Backlight","Mounting Type":"Surface Mount","Package / Case":"24-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Output":"40V","Number of Outputs":"6","Internal Switch(s)":"Yes","Operating Temperature":"-30°C ~ 85°C (TA)","Voltage - Supply (Max)":"22V","Voltage - Supply (Min)":"2.7V","Supplier Device Package":"24-WQFN (4x4)","Current - Output / Channel":"50mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.08","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.08000","currency":"USD"},{"qty":10,"price":"$2.77000","currency":"USD"},{"qty":25,"price":"$2.61880","currency":"USD"},{"qty":100,"price":"$2.26960","currency":"USD"},{"qty":250,"price":"$2.15316","currency":"USD"},{"qty":500,"price":"$1.93204","currency":"USD"},{"qty":1250,"price":"$1.64700","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/721c6f0a82b3c65ae958757b84f38b85.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional alternative — TLC5940RHBR?","answer":"The TLC5940RHBR is a linear (not boost) LED driver with 16 channels at 120 mA each, but it uses a shift-register interface and requires an external boost stage for series LED strings. The LP8545SQE/NOPB integrates the boost converter, so they are not drop-in replacements. The TLC69611RTWR is also linear and lacks an internal switch. For a direct second-source, look at other TI boost LED drivers in the same 6-channel class."},{"question":"What is the LP8545SQE/NOPB's listed type and dimming method?","answer":"The device is a DC-DC Regulator (boost topology) with PWM dimming control. The PWM input modulates the LED current to adjust brightness without color shift."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP8545SQE-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP8545SQE-NOPB 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}}