Input Protection and Backup Supply Reference Design for 25W PLC Controller Unit
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Key Document


The TIDA-03031 reference design provides a solution for input power path protection and backup supply design in a typical PLC controller unit. It replaces traditionally used discrete-circuit implementations with fully integrated protection circuits.

  • 19.2-V to 28.8-V input, 28-W output power
  • Overload, overvoltage, undervoltage, and reverse-current protection
  • Protects from field miswiring or reverse polarity
  • ±500-V, 2-Ω (8/20-μs) surge compliance with Criteria A performance (IEC 61000-4-5)
  • 120-ms backup time at 7-W output

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Schematic/Block Diagram

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Design Files

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5002  3.1-75V Wide Vin, 0.5A Current Mode Boost, Flyback, Sepic Converter  Step-up (boost) regulators  Sample & Buy Not Available
LM5160  LM5160 wide input 65V, 2A synchronous buck/Fly-Buckā„¢ converter  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
TPS2660  4.2-V to 60-V, 150mΩ, 0.1-2.23A eFuse with integrated input reverse polarity protection  Power switches  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5002 Download Download
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LM5160 Download Download
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TPS2660 Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 2674 24 Oct 2016
Design files (6)
Title Type Size (KB) Date
ZIP 419 25 Oct 2016
ZIP 652 25 Oct 2016
PDF 795 25 Oct 2016
PDF 195 25 Oct 2016
PDF 72 25 Oct 2016
PDF 353 25 Oct 2016
Related Tools & Software

Reference Designs (2)

Name Part Number Tool Type
24VDC 10A eFuse and Protection Circuit for Programmable Logic Controllers (PLC)  TIDA-00233  Reference design 
Capacitor-Based Backup Power Supply for PLC Modules Reference Design  TIDA-00500  Reference design 

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