{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP8545SQ/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP8545SQ-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP8545SQ-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP8545SQ%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP8545SQ/NOPB DC DC Regulator, Step-Up (Boost) topology, 6 outputs, 50mA per channel, 40V output, PWM dimming, 24-WFQFN Exposed Pad.","salesMarkdown":"## Boost driver for multi-string backlights The LP8545SQ/NOPB is a DC-DC boost regulator designed to drive LED backlight strings from a low-voltage rail — think 2.7 V to 22 V input stepping up to a 40 V output bus that feeds six independent channels, each sinking up to 50 mA. It is a current-production part from Texas Instruments, ROHS3 compliant, and sits in the Analog & Data Acquisition category — the scorch mark on a dead display board often traces back to a failed boost regulator, and this is the kind of IC you reach for when the original driver let the magic smoke out. The 40 V output ceiling means this driver can power up to eight white LEDs in series per channel (typical Vf ~3.2 V) with headroom for the current sink. Six channels at 50 mA each gives a total LED power budget around 12 W — enough for a 10- to 15-inch LCD backlight. For a repair, match the frequency to the original board's inductor value and output capacitor ESR. PWM dimming is handled on-chip — a PWM signal on the DIM pin modulates the LED current at the duty cycle, giving a 1000:1 dimming range at 200 Hz. The internal switch (rated 2 A typical peak) handles the boost inductor current, so no external MOSFET is needed. ## Package and thermal reality On a rework bench, that means preheating the board to 150°C before hot-air removal, or the pad lifts. For a prototype or one-off repair, the Cut Tape option avoids buying a full reel.","metaTitle":"LP8545SQ/NOPB TI LED Driver, 6-Ch 50mA Boost, 40V","metaDescription":"Texas Instruments LP8545SQ/NOPB DC-DC boost LED driver, 6 outputs at 50mA each, 40V max, PWM dimming. Active production, ROHS3. Sourced per RFQ.","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":1000,"price":"$1.64700","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/721c6f0a82b3c65ae958757b84f38b85.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Will LP8545SQ/NOPB drop into a board designed for TLC5940RHBR?","answer":"No — the TLC5940RHBR is a linear constant-current sink with a shift-register interface, not a boost regulator. The LP8545SQ/NOPB is a switching boost converter with a completely different pinout, control scheme, and external component set (inductor, diode, output cap). They are not drop-in replacements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP8545SQ-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/LP8545SQ-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}}