Datasheet Texas Instruments LM36274 — Datenblatt

Hersteller	Texas Instruments
Serie	LM36274

Datenblätter

Preise

Status

Verpackung

Parameter

Parameters / Models	LM36274YFFR
Number of Channels	4
Duty Cycle(Max), %	92
LED	32
LED Current Per Channel, mA	30
Operating Temperature Range, C	-40 to 85
Package Group	DSBGA
Package Size: mm2:W x L, PKG	See datasheet (DSBGA)
Peak Efficiency, %	92
Rating	Catalog
Shutdown Current(Typ), uA	1.2
Special Features	Adjustable Switch Frequency,CABC,I2C Control,OVP,Thermal Shutdown
Switching Frequency(Max), kHz	1050
Topology	Boost,Current Sink
Type	Inductive
Vin(Max), V	5
Vin(Min), V	2.7
Vout(Max), V	30
Vout(Min), V	27

Öko-Plan

Anwendungshinweise

• Herunterladen
  Auto-Frequency Mode Setting for Improved Boost Efficiency in White LED Backlight
  PDF, 252 Kb, Datei veröffentlicht: Oct 14, 2016
  As the load current of a boost converter is reduced, the ratio of conduction losses to switching lossesbegins to lower. Conduction losses are losses that are a function of current. Switching losses are lossesthat are a function of switching frequency. As this ratio is reduced the boost switching losses begin todominate the total circuit losses. When this happens, the benefit of lowering the
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  Analog PWM Dimming in White-LED Drivers
  PDF, 539 Kb, Datei veröffentlicht: Dec 21, 2016
  Pulse-width modulation (PWM) is a common type of dimming used to adjust the current in white-LEDdriver devices. PWM dimming takes a rectangle waveform with variable positive duty cycle (D) and adjuststhe LED current proportionally. For many smaller format white LED drivers (7-inch screen size or smaller),the PWM signal is converted to a DC control voltage and made to drive the LED current in
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  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
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  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