Datasheet Texas Instruments LP8557 — Datenblatt

HerstellerTexas Instruments
SerieLP8557
Datasheet Texas Instruments LP8557

Hocheffizienter LED-Hintergrundbeleuchtungstreiber für Tablets

Datenblätter

LP8557 High-Efficiency LED Backlight Driver For Tablets datasheet
PDF, 1.7 Mb, Revision: B, Datei veröffentlicht: Dec 18, 2015
Auszug aus dem Dokument

Preise

Status

LP8557AYFQRLP8557AYFQTLP8557IAYFQRLP8557IAYFQT
Lifecycle StatusActive (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)
Manufacture's Sample AvailabilityNoNoYesYes

Verpackung

LP8557AYFQRLP8557AYFQTLP8557IAYFQRLP8557IAYFQT
N1234
Pin16161616
Package TypeYFQYFQYFQYFQ
Industry STD TermDSBGADSBGADSBGADSBGA
JEDEC CodeS-XBGA-NS-XBGA-NS-XBGA-NS-XBGA-N
Package QTY30002503000250
CarrierLARGE T&RSMALL T&RLARGE T&RSMALL T&R
Device MarkingD40D40D41D41
Thickness (mm).42.42.42.42
Pitch (mm).4.4.4.4
Max Height (mm).675.675.675.675
Mechanical DataHerunterladenHerunterladenHerunterladenHerunterladen

Parameter

Parameters / ModelsLP8557AYFQR
LP8557AYFQR
LP8557AYFQT
LP8557AYFQT
LP8557IAYFQR
LP8557IAYFQR
LP8557IAYFQT
LP8557IAYFQT
Number of Channels6666
Duty Cycle(Max), %100100100100
LED48484848
LED Current Per Channel, mA25252525
Operating Temperature Range, C-30 to 85-30 to 85-30 to 85-30 to 85
Package GroupDSBGADSBGADSBGADSBGA
Package Size: mm2:W x L, PKGSee datasheet (DSBGA)See datasheet (DSBGA)See datasheet (DSBGA)See datasheet (DSBGA)
Peak Efficiency, %93939393
RatingCatalogCatalogCatalogCatalog
Shutdown Current(Typ), uA0.0010.0010.0010.001
Special FeaturesCABC,Edge Rate ControlCABC,Edge Rate ControlCABC,Edge Rate ControlCABC,Edge Rate Control
Switching Frequency(Max), kHz1000100010001000
TopologyBoostBoostBoostBoost
TypeInductiveInductiveInductiveInductive
Vin(Max), V5.55.55.55.5
Vin(Min), V2.72.72.72.7
Vout(Max), V28282828
Vout(Min), V7777

Öko-Plan

LP8557AYFQRLP8557AYFQTLP8557IAYFQRLP8557IAYFQT
RoHSCompliantCompliantCompliantCompliant

Anwendungshinweise

  • Schottky Diode Selection in Asynchronous Boost Converters
    PDF, 491 Kb, Datei veröffentlicht: Sep 6, 2016
    Asynchronous boost converters require a Schottky diode as the rectifying element due to the diode's lowforward voltage and fast turn-on time. Because of these characteristics asynchronous boost converterscan have as good as, or better efficiency, than synchronous boost converters. This is especially true whenthe boost conversion ratios (VOUT/VIN) are high, and the Schottky diode conduction t
  • Inductor Selection in Boost Converters for LCD Backlight Applications
    PDF, 764 Kb, Datei veröffentlicht: Oct 24, 2016
    White LED drivers for LCD back-light applications are often designed for battery-powered devices. This makes circuit size and efficiency crucial. Because of this, selecting the optimal inductor is one of the mostimportant aspects of the design. This application note discusses the important parameters of the inductorand how to select the right inductor for the application.

Modellreihe

Herstellerklassifikation

  • Semiconductors> Power Management> LED Driver> Backlight