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Product details

Parameters

Channels (#) 2 Vin (Min) (V) 2.7 Vin (Max) (V) 5 Switching frequency (Max) (kHz) 1050 Product type Inductive LED current per channel (mA) 30 Shutdown current (Typ) (uA) 1.2 Topology Boost, Current Sink Peak efficiency (%) 92 Features Adjustable Switch Frequency, CABC, Direct PWM Dimming, I2C Control, OVP, Thermal Shutdown Operating temperature range (C) -40 to 85 open-in-new Find other Backlight LED drivers

Package | Pins | Size

DSBGA (YFF) 24 0 mm² 1.68 x 2.45 open-in-new Find other Backlight LED drivers

Features

  • 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

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Description

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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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 12
Type Title Date
* Datasheet LM36272 Two-Channel LCD Backlight Driver With Integrated Bias Power datasheet (Rev. D) Mar. 02, 2018
Technical articles Overcoming challenges for backlight LED drivers in automotive display solutions Jul. 16, 2020
Application notes How to Use LM3627x to Design DPU in Smartphones May 07, 2020
Application notes LM3627x Layout Guidelines Oct. 12, 2017
Application notes Analog PWM Dimming in White-LED Drivers Dec. 21, 2016
Application notes Inductor Selection in Boost Converters for LCD Backlight Applications Oct. 24, 2016
Application notes Auto-Frequency Mode Setting for Improved Boost Efficiency in White LED Backlight Oct. 14, 2016
Technical articles Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Application notes Schottky Diode Selection in Asynchronous Boost Converters Sep. 06, 2016
Technical articles LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
User guides Using the LM36274EVM Evaluation Module Feb. 08, 2016
Technical articles Take better selfies with innovative LED flashes Nov. 18, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

GUIS FOR EVALUATION MODULES (EVM) Download
SNVC194.ZIP (2424 KB)

Software development

DRIVERS & LIBRARIES Download
Linux Driver for LM3532
LM3532SW-LINUX 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 (...)

Design tools & simulation

SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
DSBGA (YFF) 24 View options

Ordering & quality

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