Power Supply with Programmable Output Voltage and Protection for Position Encoder Interfaces


Design files


This reference design implements a universal power supply with programmable output voltage and innovative smart eFuse technology for use in a multi-standard position encoder interface module on an industrial drive. The eFuse provides inrush-current and over-current protection as well as user programmable over- and under-voltage protection with limits accurate across the industrial temperature range. This design is realized to meet EMC immunity requirements for ESD, fast transient burst and surge according to IEC61800-3.

  • Power supply design supports different supply voltage requirements for a wide range of position encoders with digital or analog interface
  • Offers a wide-input voltage range, 18 V to 36 V (24-V nominal) and high efficiency (>80%)
  • Output voltage programmable from 5-V to 15-V with <15-mVpp ripple at 300-mA load current
  • Output protection with innovative eFuse technology, inrush-current limitation, and protection against overcurrent, over- and under-voltage. Protection limits are constant across the industrial temperature range
  • Fault handling: disconnect in case of fault, enable pin for power supply reset
  • Power good indicator flags for diagnostics
  • Designed to meet EMC requirements for ESD, EFT and surge according to IEC61800-3
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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.

TIDU533.PDF (4819 K)

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

TIDRBA6.ZIP (2913 K)

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

TIDC702.ZIP (747 K)

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

TIDRBA5.PDF (1190 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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eFuses & hot swap controllers

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Technical documentation

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* Design guide Power Supply With Programmable Output Voltage and Protection (TIDA-00180) Oct. 06, 2014

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