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Product details

Parameters

Channels (#) 1 Vin (Min) (V) 1.8 Vin (Max) (V) 6 Switching frequency (Max) (kHz) 1000 Product type Inductive LED current per channel (mA) 50 Shutdown current (Typ) (uA) 0.1 Topology Boost Peak efficiency (%) 85 Features Load Disconnect During Shutdown Operating temperature range (C) -40 to 85 open-in-new Find other Backlight LED drivers

Package | Pins | Size

VSON (DRB) 8 9 mm² 3.0 x 3.0 open-in-new Find other Backlight LED drivers

Features

  • Current Source With Overvoltage Protection
  • Input Voltage Range: 1.8 V to 6 V
  • Internal 30 V Switch
  • Up to 85% Efficiency
  • Precise Brightness Control Using PWM Signal or
    Analog Signal
  • Switching Frequency: Up to 1 MHz
  • Internal Power MOSFET Switch: 500 mA
  • Operates With Small Output Capacitors Down to 100 nF
  • Disconnects LEDs During Shutdown
  • No Load Quiescent Current: 38 µA Typ
  • Shutdown Current: 0.1 µA Typ
  • Available in a Small 3 mm × 3 mm QFN Package
open-in-new Find other Backlight LED drivers

Description

The TPS61042 is a high frequency boost converter with constant current output that drives white LEDs or similar. The LED current is set with the external sense resistor (RS) and is directly regulated by the feedback pin (FB) that regulates the voltage across the sense resistor RS to 252 mV (typ). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a frequency range of 100 Hz to 50 kHz to the control pin (CTRL). To allow higher flexibility, the device can be configured where the brightness can be controlled by an analog signal as well, as described in the application information section. To avoid possible leakage currents through the LEDs during shutdown, the control pin (CTRL) disables the device and disconnects the LEDs from ground. For maximum safety during operation, the output has integrated overvoltage protection that prevents damage to the device in case of a high impedance output (e.g. faulty LED).

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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 18
Type Title Date
* Datasheet TPS61042 Constant Current LED Driver datasheet (Rev. D) Dec. 03, 2014
White papers Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
Technical articles Overcoming challenges for backlight LED drivers in automotive display solutions Jul. 16, 2020
Application notes Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Application notes QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application notes Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) Nov. 29, 2017
Application notes Extending the Soft Start Time Without a Soft Start Pin (Rev. B) Jun. 15, 2017
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
Application notes Design considerations for a resistive feedback divider in a DC/DC converter Apr. 26, 2012
Application notes IQ: What it is, what it isn’t, and how to use it Jun. 17, 2011
Application notes White Light LED Driver With Gradual Dimming (Rev. A) Jan. 10, 2007
Application notes Single Cell TPS61041 LED Driver Jun. 09, 2003
White papers White LED Power Supply Design Techniques Feb. 18, 2003
User guides TPS61042EVM-226 White Light LED Bias Supply EVM Sep. 13, 2002
Application notes High Voltage Power Supply Using the TPS61040 Jul. 09, 2002

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
80
Description
The KDK350ADPTR-EVM provides a physical adapter layer to interface the MSP432E411Y on the MSP432E411Y-BGAEVM to a Kentec Display K350QVG-V2-F-04 LCD, including the LCD backlight driver.  This EVM can be used as a reference for connecting other LCD modules to the MSP432E411Y-BGAEVM.
Features
  • Features Kentec Display K350QVG-V2-F LCD Display
  • Integrated LCD backlight driver
  • Supports 8- and 16-bit parallel interface
  • Connections for LCD resistive touch interface
EVALUATION BOARDS Download
document-generic User guide
49
Description

The TPS61042EVM-226 is an evaluation tool for the TPS61042 inductive boost converter in 3x3mm2 QFN that can supply voltages up to 28V from input voltages in the range of 1.8V to 6V. The EVM is configured to supply a 20-mA bias current to 4 on-board white LEDs. The EVM can also be used to evaluate (...)

Design tools & simulation

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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
  • (...)

Reference designs

REFERENCE DESIGNS Download
Camera Reference Design for ARM® Cortex®-M Microcontrollers (MCUs)
TIDM-TM4C129CAMERA This design implements a network camera with a QVGA display panel and an embedded web server for remote monitoring.  With a memory footrpint of 250KB for the web server, there is ample memory available on the TM4C129x microcontroller for additional customizations.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Interfacing SDRAM Memory on High Performance Microcontrollers
TIDM-TM4C129XSDRAM This reference design demonstrates how to implement and interface SDRAM Memory to the performance microcontroller TM4C129XNCZAD. The implementation is made possible by using the EPI Interface of the Microcontroller to interface a 256Mbit SDRAM at 60MHz which allows developers to implement additional (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Connected Ethernet, USB, and LCD Reference Design
TIDM-CONNECTED-ETHERNET This TI Design will demonstrate several ethernet- and LCD-enabled applications such as remote sensor monitoring, ethernet configuration via web-based and LCD dashboards and aware applications that interface with weather websites.
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SON (DRB) 8 View options

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