Various LED Ring Lighting Patterns Reference Design


Design files


This reference design enables human-machine interface scenarios with an LED ring that utilizes two LP5024 LED drivers to create vivid lighting patterns. Design helps to resolve common challenges for end equipment with complicated lighting patterns and constant voltage supply. This design can also adjust LP5024 brightness with analog dimming without impacting the lighting pattern contrast ratio on dynamic ambient light sense.

  • Vivid lighting patterns with 12-Bit, 29-kHz PWM dimming through an I2C interface
  • Ultra-Low standby current down to 10 μA with automatic power saving mode
  • Programmable banks (R/G/B) for easy software control of each color
  • Dynamically adjusts brightness on ambient light sense

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.


Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement


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

TIDCEY7.ZIP (1245 K)

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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

RGB LED drivers

LP502424-channel I2C constant-current RGB LED driver

Data sheet: PDF | HTML
Ambient light sensors

OPT3001Digital ambient light sensor (ALS) with high-precision human-eye response

Data sheet: PDF | HTML

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Code example or demo

TIDA-050011 Sample Code — TIDCEY6.ZIP (536 K)

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Technical documentation

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* Design guide Various LED Ring Lighting Patterns Reference Design Nov. 01, 2018
White paper Smart speaker fundamentals: Weighing the many design trade-offs Feb. 25, 2019
White paper 智慧型喇叭基本說明: 衡量各種設計優缺點 Feb. 08, 2019
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