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LM36272

ACTIVO

Retroiluminación LCD de dos canales y potencia de polarización

Detalles del producto

Number of channels 2 Vin (min) (V) 2.7 Vin (max) (V) 5 Vout (min) (V) 27 Vout (max) (V) 30 Type Inductive Switching frequency (max) (kHz) 1050 Duty cycle (max) (%) 92 LED current per channel (mA) 30 Peak efficiency (%) 92 Topology Boost, Current Sink Features Adjustable Switch Frequency, CABC, Direct PWM Dimming, I2C control, OVP, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 2 Vin (min) (V) 2.7 Vin (max) (V) 5 Vout (min) (V) 27 Vout (max) (V) 30 Type Inductive Switching frequency (max) (kHz) 1050 Duty cycle (max) (%) 92 LED current per channel (mA) 30 Peak efficiency (%) 92 Topology Boost, Current Sink Features Adjustable Switch Frequency, CABC, Direct PWM Dimming, I2C control, OVP, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YFF) 24 4.67999999999999928 mm² 1.8 x 2.5999999999999996
  • Drives up to Two Parallel White LED Strings
    (29-V Maximum VOUT)
  • 11-Bit Exponential and Linear Dimming Control
  • PWM and I2C Brightness Control
  • Backlight Operation With 4.7-µH to 15-µH Inductor
  • Backlight and LCD Bias Efficiency up to 92%
  • Programmable LCD Bias Voltages (±4 V to ±6.5 V With 50-mV resolution) With Up to 80-mA per Output
  • 0.2% Matched LED Current From 60 µA to 30 mA
  • 1% Accurate LED Current From 60 µA to 30 mA
  • 2.7-V to 5-V Input Voltage Range
  • Drives up to Two Parallel White LED Strings
    (29-V Maximum VOUT)
  • 11-Bit Exponential and Linear Dimming Control
  • PWM and I2C Brightness Control
  • Backlight Operation With 4.7-µH to 15-µH Inductor
  • Backlight and LCD Bias Efficiency up to 92%
  • Programmable LCD Bias Voltages (±4 V to ±6.5 V With 50-mV resolution) With Up to 80-mA per Output
  • 0.2% Matched LED Current From 60 µA to 30 mA
  • 1% Accurate LED Current From 60 µA to 30 mA
  • 2.7-V to 5-V Input Voltage Range

The LM36272 is an integrated two-channel WLED driver and LCD bias supply. The ultra-compact size, high efficiency, high level of integration, and programmability allow the LM36272 to address a variety of applications without the need for hardware changes while minimizing the overall solution area.

The backlight boost provides the power to bias two parallel LED strings with up to 29-V total output voltage. The 11-bit LED current is programmable via the I2C bus and/or controlled via a logic level PWM input from 60 µA to 30 mA. Each LED string can be independently enabled or disabled to provide zone dimming capabilities. The backlight boost can be operated efficiently with an inductance range from 4.7 µH to 15 µH, allowing for efficiency and solution size optimization.

The LCD bias boost provides the power to both a positive LDO and an inverting charge pump. Both positive and negative bias supplies have programmable output voltages of ±4 V to ±6.5 V with 50-mV steps and up to ±80 mA of current capability. An auto-sequencing feature provides a programmed delay from positive to negative bias activation, with additional programmable voltage slew rate control. Two wake-up modes allow both bias outputs to be controlled with a single external signal and stay active while consuming very low quiescent current.

The LM36272 is an integrated two-channel WLED driver and LCD bias supply. The ultra-compact size, high efficiency, high level of integration, and programmability allow the LM36272 to address a variety of applications without the need for hardware changes while minimizing the overall solution area.

The backlight boost provides the power to bias two parallel LED strings with up to 29-V total output voltage. The 11-bit LED current is programmable via the I2C bus and/or controlled via a logic level PWM input from 60 µA to 30 mA. Each LED string can be independently enabled or disabled to provide zone dimming capabilities. The backlight boost can be operated efficiently with an inductance range from 4.7 µH to 15 µH, allowing for efficiency and solution size optimization.

The LCD bias boost provides the power to both a positive LDO and an inverting charge pump. Both positive and negative bias supplies have programmable output voltages of ±4 V to ±6.5 V with 50-mV steps and up to ±80 mA of current capability. An auto-sequencing feature provides a programmed delay from positive to negative bias activation, with additional programmable voltage slew rate control. Two wake-up modes allow both bias outputs to be controlled with a single external signal and stay active while consuming very low quiescent current.

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Documentación técnica

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Tipo Título Fecha
* Data sheet LM36272 Two-Channel LCD Backlight Driver With Integrated Bias Power datasheet (Rev. D) PDF | HTML 02 mar 2018
White paper Common LED Functions and LED Driver Design Considerations 21 sep 2020
Application note How to Use LM3627x to Design DPU in Smartphones 07 may 2020
Application note LM3627x Layout Guidelines 12 oct 2017
Application note Analog PWM Dimming in White-LED Drivers 21 dic 2016
Application note Inductor Selection in Boost Converters for LCD Backlight Applications 24 oct 2016
Application note Auto-Frequency Mode Setting for Improved Boost Efficiency in White LED Backlight 14 oct 2016
Application note Schottky Diode Selection in Asynchronous Boost Converters 06 sep 2016
EVM User's guide Using the LM36274EVM Evaluation Module 08 feb 2016

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Controlador o biblioteca

LM3532SW-LINUX — Controlador Linux para LM3532

The Linux driver supports the LMU(Lighting Management Unit) devices for smartphone handsets. The Linux driver supports communication through the I2C bus and interfaces with various sub-systems.

 

Linux Mainline Status

Available in Linux Main line: No
Available through git.ti.com: (...)

GUI para el módulo de evaluación (EVM)

SNVC194 LM36274EVM GUI 1.0.0

Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores para LED de retroiluminación
LM36272 Retroiluminación LCD de dos canales y potencia de polarización LM36273 Retroiluminación LCD de tres canales y potencia de polarización LM36274 Controlador de retroiluminación integrada con polarización de LCD
Desarrollo de hardware
Placa de evaluación
LM36274EVM Módulo de evaluación de inversor con bomba de carga regulado (LM36274)
Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
DSBGA (YFF) 24 Ultra Librarian

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.

Soporte y capacitación

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