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Optical Sense Backlight Reference Design with Temperature Sensing
TIDA-01008
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Description & Features

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Key Document

Description

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.

Features
  • 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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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (7)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM74700-Q1  3.2-V to 65-V, 80-uA IQ automotive ideal diode controller  Power switches  Sample & Buy View Design Kits & Evaluation Modules
LP8863-Q1  LP8863-Q1 Automotive Display LED-Backlight driver with Six 150-mA channels  LED drivers  Not Available View Design Kits & Evaluation Modules
MSP430FR2633  Capacitive Touch MCU with 16 touch IO (64 sensors), 16KB FRAM, 4KB SRAM, 19 IO, 10-bit ADC  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
OPT3001-Q1  Automotive digital ambient light sensor (ALS) with high-precision human-eye response  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
TMP423-Q1  AEC-Q100 Automotive 3Ch Remote Temperature Sensor  Temperature sensors  Sample & Buy Not Available
TPS22918-Q1  5.5-V, 2-A, 52-mΩ automotive load switch with adj. rise time and adj. output discharge  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS7B69-Q1  Automotive 150-mA, off-battery (40-V), high-PSRR, low-IQ, low-dropout voltage regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM74700-Q1 Download -
Download
LP8863-Q1 Download
MSP430FR2633 Download -
Download -
Download Download
OPT3001-Q1 Download Download
TMP423-Q1 Download -
TPS22918-Q1 Download Download
TPS7B69-Q1 Download
Download -

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Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guide (1)
Title Type Size (KB) Date
PDF 3291 01 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 4494 22 Dec 2017
ZIP 1666 22 Dec 2017
PDF 2165 22 Dec 2017
PDF 319 22 Dec 2017
PDF 104 22 Dec 2017
PDF 293 22 Dec 2017
Related Tools & Software

Software development (1)



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