16-channel Status LED Driver for PLC Modules Reference Design


Design files


The objective of TIDA-00560 is to demonstrate a multi-channel LED driver as required in PLC I/O modules to indicate the status of several analog, digital input and output channels. Important requirements for low static current, low component count, minimal PCB requirements and an integrated LED diagnostic features are addressed with this design. The two-layer single-side component mounted board is compatible with the BeagleBone cape specification for rapid evaluation with the BeagleBone platform.

  • 16-channel shift register with wide range constant current sinks (2 mA to 35 mA)
  • Two-level selectable LED brightness to compensate for ambient light
  • Diagnostic features: LED open and LED shorted to ground
  • Standardized SPI connects seamlessly to standard processors
  • Number of channels can be increased by daisy-chaining multiple LED driver devices
  • BeagleBone cape support for easy evaluation
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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.


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


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

TIDRFA3.PDF (3862 K)

PCB layer plot file used for generating PCB design layout


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

LED display drivers

TLC592816 channel constant current LED driver with LED open Detection

Data sheet: PDF
OR gates

SN74LVC1G3321-ch, 3-input 1.65-V to 5.5-V 32-mA drive strength OR gate

Data sheet: PDF
XOR (exclusive OR) gates

SN74LVC2G862-ch, 2-input, 1.65-V to 5.5-V XOR (exclusive OR) gates

Data sheet: PDF

Technical documentation

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Type Title Date
* User guide 16-Ch Status LED Driver for PLC Modules Design Guide (Rev. A) Jun. 30, 2015

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