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Product details

Parameters

Channels (#) 3 Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Switching frequency (Max) (kHz) 1100 Product type Inductive LED current per channel (mA) 30 Shutdown current (Typ) (uA) 1 Topology Boost Peak efficiency (%) 91 Features I2C Control, OVP, PWM Control Operating temperature range (C) -40 to 125 open-in-new Find other Backlight LED drivers

Package | Pins | Size

DSBGA (YFQ) 12 0 mm² 1.3 x 1.65 open-in-new Find other Backlight LED drivers

Features

  • Drives three parallel high-voltage led strings for display and keypad lighting
  • High-voltage strings capable of up to 40-V output voltage and up to 90% efficiency
  • Up to 30 mA per current sink
  • 11-Bit configurable dimming resolution
  • PWM input for content adjustable brightness control (CABC)
  • Fully configurable LED grouping and control
  • Integrated 1-A/40-V MOSFET
  • Adaptive boost output to LED voltages
  • Selectable 500-kHz and 1-MHz switching frequency
  • Four configurable overvoltage protection thresholds (16 V, 24 V, 32 V, and 40 V)
  • Overcurrent protection
  • Thermal shutdown protection
  • 29-mm2 Total solution size

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open-in-new Find other Backlight LED drivers

Description

The LM3697 11-bit LED driver provides high-performance backlight dimming for 1, 2, or 3 series LED strings while delivering up to 90% efficiency. The boost converter with integrated 1-A, 40-V MOSFET automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.

The LM3697 is a high-efficiency three-string power source for backlight or keypad LEDs in smart-phone handsets. The high-voltage inductive boost converter provides the power for three-series LED strings for display backlight and keypad functions (HVLED1, HVLED2, and HVLED3).

An additional feature is a pulse width modulation (PWM) control input for content adjustable backlight control, which can be used to control any high-voltage current sink.

The LM3697 is fully configurable via an I2C-compatible interface. The device operates over a
2.7-V to 5.5-V input voltage range and a −40°C to +85°C temperature range.

open-in-new Find other Backlight LED drivers
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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 7
Type Title Date
* Datasheet LM3697 High-efficiency three-string white LED driver datasheet (Rev. D) Mar. 27, 2019
Technical articles Overcoming challenges for backlight LED drivers in automotive display solutions Jul. 16, 2020
Application notes Analog PWM Dimming in White-LED Drivers Dec. 21, 2016
Technical articles Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical articles LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical articles Take better selfies with innovative LED flashes Nov. 18, 2014
User guides LM3697EVM User Guide Nov. 15, 2013

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
149
Description

The LM3697 Evaluation Module (LM3697EVM) is designed to fully evaluate the LM3697 Three String backlight driver.  The LM3697EVM consists of the LM3697, 3p10s white LED strings, level shifters and the USB2ANY interface.  The Texas Instruments USB2ANY interface provides the hardware link (...)

Features
  • Supports 1p4s thru 3p10s LED strings (jumper configurable)
  • Includes PC USB to I2C interface
  • GUI Software allows easy interaction with the LM3697
GUIS FOR EVALUATION MODULES (EVM) Download
SNVC095.ZIP (6810 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 MODELS Download
SNOM463B.ZIP (51 KB) - PSpice Model
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 (YFQ) 12 View options

Ordering & quality

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