RGB Signal Light With IO-Link Interface Reference Design


Design files


This reference design implements a five-segment LED smart stack light with 20 LEDs used in factory floor and industrial process automation of greater complexity. An IO-Link interface is implemented for controlling the stack light and reading back status information. The design features low power consumption to be powered through the IO-Link interface.

This signal light reference design demonstrates how the power dissipation of the RGB LED driver can be reduced by 30% and the range of the brightness control can be extended. Automatic brightness control adapts the brightness to ambient light. The reference design uses a simple PWM to modify the output voltage of a switching regulator to implement dynamic headroom control.

  • Flexible and easy-to-control RGB LED tower light design
  • Different implemented modes: demo, temperature, humidity, stacklight
  • Fully controllable through IO-link
  • Five segments consisting of 20 RGB LEDs
  • Dynamic headroom control of linear RGB LED driver to reduce power consumption by 30%
  • Automatic brightness control
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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.

TIDUD35.PDF (2417 K)

Reference design overview and verified performance test data

TIDRSL8.PDF (1361 K)

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

TIDRSM2.ZIP (2143 K)

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


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

TIDRSM1.PDF (1721 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

LM51663V-65V Input, 500mA Synchronous Buck Converter With Ultra-Low Iq

Data sheet: PDF | HTML
Buck converters (integrated switch)

TPS540624.7V to 60V Input, 50mA Synchronous Step-Down Converter with Low IQ

Data sheet: PDF | HTML
Humidity sensors

HDC10802% RH low-power digital relative humidity sensor

Data sheet: PDF | HTML
IO-Link & digital I/Os

TIOL111IO-Link device transceiver with integrated surge protection

Data sheet: PDF | HTML
Light sensors

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

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FR596916 MHz MCU with 64KB FRAM, 2KB SRAM, AES, 12-bit ADC, comparator, DMA, UART/SPI/I2C, timer

Data sheet: PDF | HTML
N-channel MOSFETs

CSD13202Q212-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 9.3 mOhm

Data sheet: PDF | HTML
RGB LED drivers

TLC597112-channel, 16-bit ES-PWM RGB LED driver with 3.3V Linear Regulator

Data sheet: PDF | HTML
TVS diodes

TVS330033V flat-clamp surge protection device

Data sheet: PDF | HTML

Start development

Design tools & simulation

Simulation model

TIDA-01437 Simulation — TIDM015.ZIP (225 K)

Technical documentation

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Type Title Date
* Design guide RGB Signal Light With IO-Link Interface Reference Design Sep. 11, 2017
Technical article Using dynamic headroom control for industrial lighting applications PDF | HTML Jun. 28, 2018

Related design resources

Design tools & simulation

TINA-TI SPICE-based analog simulation program

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