Isolated Ultra-Low Power Design for 4 to 20 mA Loop Powered Transmitters TIDA-00167 (ACTIVE)

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Key Document

Description

The objective of this design is to provide a turn-key solution able to power the electronics of isolated loop powered 4 to 20 mA transmitters or other low power applications with limited input current budget. It addresses the key requirements of such applications like operating over wide input voltage range, providing isolated and no-isolated noise-free outputs and offering a complete set of protection features. Multiple test points on the board, a dual layer - single side populated construction and a comprehensive documentation enable easy testing, modification and optimization by the user.

Watch the TIDA-00349 Overview video, covering the same isolated power topology as used in the TIDA-00167 NOW

Features
  • Operates over a wide input voltage range from 8 to 33
  • Provides isolated and non-isolated 3.3V rails, selectable between low Iq LDOs and high PSRR LDOs
  • Highly efficient isolated DC/DC converter with constant switching frequency achieves more than 70% efficiency at 5 to 8 mW load
  • Contains input surge protection (EN 61000-4-5: ±1 kV), reverse protection, current limiters for hot-plug and surge and protects a transmitters loop current sense circuit
  • On-board ripple filter to address conducted EMI requirements (EN 55011) and decoupling from loop current
  • Fully functional board which can easily be tested, modified and optimized

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Schematic/Block Diagram

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS27082L  PFET Load Switch with Adjustable Slew Rate, Fast Transient Isolation & Hysteretic Control  Power switches  Not Available Not Available
TPS60402  60mA Charge Pump Voltage Inverter with Fixed 50kHz Operation  DC/DC switching regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS27082L Download Download
TPS60402 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 11528 20 Jun 2014
White papers (1)
Title Type Size (KB) Date
PDF 1238 12 Feb 2015
Design files (7)
Title Type Size (KB) Date
ZIP 278 29 Sep 2014
ZIP 825 29 Sep 2014
PDF 6007 29 Sep 2014
PDF 1881 29 Sep 2014
PDF 260 29 Sep 2014
PDF 47 29 Sep 2014
PDF 3288 29 Sep 2014
Related Tools & Software

Reference Designs  ( 5 )


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