Software
Application software & framework
TIDA-020001
Automotive 144-Zone Local Dimming Backlight Reference Design
TIDA-020001
Overview
This local dimming backlight reference design conserves power, extends the life of liquid-crystal displays (LCDs), and enhances automotive display quality through high dynamic range (HDR) or localized dimming technology. Seven multi-channel constant-current LED drivers allow for 144-zone localized dimming via pulsewidth modulation (PWM) on-time and current-level brightness configuration. A single serial interface allows daisy-chaining of the LED drivers for brightness and configuration programming. Temperature and ambient light sensors enable sensing of the surrounding conditions to protect from overtemperature scenarios and adjust the global brightness based on ambient brightness.
Features
- Individually dim backlight zones saves power, prevents backlight bleed, and realizes HDR and local dimming solutions
- High-voltage transient and reverse battery protection
- Ambient light sensing with excellent human eye spectral response matching with strong IR rejection (<1%)
- Dynamically adjusts backlight brightness on logarithmic scale based on human eye and perception of brightness
- Direct-lit backlight configuration
- Single-chip sensing solutions without thermistors or photo-diodes
Automotive
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.
TIDUEA1.PDF (5914 K)
Reference design overview and verified performance test data
TIDRX84.PDF (497 K)
Detailed schematic diagram for design layout and components
TIDRX85.PDF (37 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRX86.PDF (435 K)
Detailed overview of design layout for component placement
TIDRX88.ZIP (2154 K)
Files used for 3D models or 2D drawings of IC components
TIDCEW8.ZIP (1775 K)
Design file that contains information on physical board layer of design PCB
TIDRX87.PDF (3079 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
AC/DC & DC/DC converters (integrated FET)
LMR14030-Q1 — SIMPLE SWITCHER® Automotive 40-V, 3.5-A, 2.2-MHz step-down converter with 40-uA IQ
Data sheet: PDFAutomotive LED drivers
TLC6C5716-Q1 — Automotive 16 channel Full diagnostics constant current RGB LED driver
Data sheet: PDF | HTMLAutomotive LED drivers
TLC6C5724-Q1 — Automotive 24 channel Full diagnostics constant current RGB LED driver
Data sheet: PDF | HTMLIdeal diode/ORing controllers
LM74700-Q1 — 3.2-V to 65-V, 80-uA IQ automotive ideal diode controller
Data sheet: PDF | HTMLLight sensors
OPT3001-Q1 — Automotive digital ambient light sensor (ALS) with high-precision human-eye response
Data sheet: PDF | HTMLLinear & low-dropout (LDO) regulators
TPS7A52-Q1 — Automotive 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator
Data sheet: PDF | HTMLLoad switches
TPS22918-Q1 — 1-ch, 5.5-V, 2-A, 52-mΩ automotive load switch with adj. rise time and adj. output discharg
Data sheet: PDF | HTMLStart development
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Automotive 144-Zone Local Dimming Backlight Reference Design | Oct. 04, 2018 |
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