High Efficiency Isolated CAN & Profibus Interface Reference Design


Design files


The high-efficiency isolated CAN and Profibus interface reference design is intended for use in industrial systems that require isolated power for CAN and/or Profibus transceivers. This design highlights the ability to completely shut off both the power converter and data transceivers with just one GPIO signal from a microcontroller (when dropping into low-power modes, for example). This isolated interface delivers accurately regulated rails for both primary and secondary power to our Profibus and CAN transceivers without costly opto-coupler feedback circuits making this a simple, efficient and flexible isolated interface for industrial automation. This reference design has the additional feature of allowing the MCU to wait until power is good before transmitting data or to stop transmitting data if a power fault has occured on the interface.

The Tiva C Series Launch Pad form factor of this reference design allows easy connection to the LaunchPad board for use of the Tiva C microcontroller in handling the communications protocol to the interface.

  • Enable, soft-start and fault functions of TPS55010 provide full MCU control of the power supply rails to the communications interface to maximize system power savings
  • Adjustable, high-switching frequency increases efficiency, decreases solution size and allows avoidance of sensitive frequency bands
  • Galvanic insulation technology used in isolated Profibus and CAN transceivers provide proven reliability and stability over time, temperature and moisture
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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.

TIDU136.PDF (5467 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDR129.PDF (137 K)

Detailed schematic diagram for design layout and components

TIDR130.PDF (53 K)

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

TIDC072.ZIP (569 K)

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

TIDC071.ZIP (385 K)

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


Includes TI products in the design and potential alternatives.

Isolated CAN transceivers

ISO1050Isolated 5-V CAN transceiver

Data sheet: PDF | HTML
Isolated DC/DC converters & modules

TPS550102.95V To 6V Input, 2W, Isolated DC/DC Converter with Integrated FETS

Data sheet: PDF | HTML
Isolated RS-485 transceivers

ISO117640-Mbps, half-duplex, isolated RS-485 & RS-422 transceiver

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report TIDA-00012 Test Results Sep. 04, 2013

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