{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP8557AYFQT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP8557AYFQT","canonicalUrl":"https://icboms.com/texas-instruments/LP8557AYFQT","factsUrl":"https://icboms.com/api/mcp/products/LP8557AYFQT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP8557AYFQT DC-DC boost LED driver, 6 outputs, 28V, 25mA/ch, PWM dimming, 16-DSBGA, active.","salesMarkdown":"## 6-channel boost LED driver with integrated switch The LP8557AYFQT is a 6-output DC-DC boost regulator from Texas Instruments, designed to drive LED backlight strings. It integrates the switching FET internally, delivering up to 28V output and 25mA per channel — enough series headroom for a string of six to eight white LEDs in a typical 3.0V to 3.3V Vf stack. Dimming is handled via PWM, which is the standard approach for backlight brightness control — the PWM signal modulates the LED current on/off at a frequency above visible flicker, preserving color accuracy across the brightness range. ## Switching frequency and supply range The oscillator is pin-selectable between 500 kHz and 1 MHz. The choice trades board area against a percent or two of battery life. The undervoltage lockout sits below 2.7 V, so the driver starts cleanly from a battery that has not yet reached full charge. Rated for -30°C to +85°C ambient — this is the industrial temperature band. A handheld device or indoor display that sees 60°C on a hot day still has 25°C of margin before the junction hits the 125°C abs-max. The 16-DSBGA package is a 0.5 mm pitch wafer-level chip-scale package — the board must have a soldermask-defined pad and a stencil aperture that matches the datasheet footprint exactly. No underfill is required for most portable applications, but a drop-test qualification is recommended for wearable or handheld designs.","metaTitle":"TI LP8557AYFQT 6-Ch Boost LED Driver, 28V, 25mA/ch","metaDescription":"Texas Instruments LP8557AYFQT 6-channel boost LED driver, 28V output, 25mA per channel, PWM dimming. Active, ROHS3. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"DC DC Regulator","Dimming":"PWM","Package":"Tape & Reel (TR); Cut Tape (CT)","Topology":"Step-Up (Boost)","Frequency":"500kHz, 1MHz","Applications":"Backlight","Mounting Type":"Surface Mount","Package / Case":"16-WFBGA, DSBGA","lifecycle_stage":"eol_hot","Voltage - Output":"28V","Number of Outputs":"6","Internal Switch(s)":"Yes","Operating Temperature":"-30°C ~ 85°C (TA)","Voltage - Supply (Max)":"5.5V","Voltage - Supply (Min)":"2.7V","Supplier Device Package":"16-DSBGA","Current - Output / Channel":"25mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.77","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.77000","currency":"USD"},{"qty":10,"price":"$2.49200","currency":"USD"},{"qty":25,"price":"$2.35040","currency":"USD"},{"qty":100,"price":"$2.00270","currency":"USD"},{"qty":250,"price":"$1.88044","currency":"USD"},{"qty":500,"price":"$1.64538","currency":"USD"},{"qty":1250,"price":"$1.36332","currency":"USD"},{"qty":2500,"price":"$1.33050","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b961e0a5b67d314527fa376d75c38969.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is LP8557AYFQT's listed type and dimming method?","answer":"The LP8557AYFQT is a DC-DC boost regulator with PWM dimming. It is a switching LED driver, not a linear current sink."},{"question":"Will LP8557AYFQT drop into a board designed for TLC5940RHBR?","answer":"No — the TLC5940RHBR is a 16-channel linear shift-register LED driver with a 3V supply and 0.12A per channel, while the LP8557AYFQT is a 6-channel boost regulator with integrated switch. The topology, pinout, and supply architecture are fundamentally different. A board spin is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP8557AYFQT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP8557AYFQT 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}}