Optical Sense Backlight Reference Design with Temperature Sensing


Design files


This reference design conserves power and extends life of LCD and backlight by adjusting the backlight brightness relative to the ambient light level. The capTIvate touch slider allows the brightness to be finetuned per the user's brightness preference. The sensitive thermal requirements of the LCD display is monitored by the remote temperature sensors enabling thermal shutdown to protect the system.

  • Operating range from 4V to 40V
  • 6 strings of 8 LEDs, 150mA max per string
  • Adjusts backlight brightness based on ambient light level
  • Capacitive touch slider for tuning or setting brightness
  • Temperature monitoring and shutdown during over-temperature condition
  • Lowers system power and extends life of backlight and LCD
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDI3.PDF (3291 K)

Reference design overview and verified performance test data

TIDRV45.PDF (293 K)

Detailed schematic diagram for design layout and components

TIDRV46.PDF (104 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRV47.PDF (319 K)

Detailed overview of design layout for component placement

TIDRV49.ZIP (1666 K)

Files used for 3D models or 2D drawings of IC components

TIDCED4.ZIP (4494 K)

Design file that contains information on physical board layer of design PCB

TIDRV48.PDF (2165 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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MSP430 microcontrollers

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Technical documentation

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Type Title Date
* Design guide Reference Design for Optical Sense-Controlled Backlight With Temperature Sensing Dec. 01, 2017

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