-48V Telecom Current/Voltage/Power Sense with Isolation

(ACTIVE) TIDA-00313

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Description

This verified design can accurately measure current, voltage and power on a bus that carries -48V and is able to provide this data using an I²C compatible interface. This design is targeted for Telecom applications because the most common Telecom equipment’s are fed with this negative supply voltage. It uses INA226 and ISO1541. The INA226 is a current shunt and power monitor with an I²C compatible interface. This device will precisely take these measurements and will use ISO1541 to translate the negative voltage to ground referenced signals. The ISO1541 is a low-power, bidirectional I²C compatible isolator.

Features
  • Ability to report current, voltage and power on a bus that carries -48V
  • High Accuracy:

- 10µV Offset (Max)

- 0.1% Gain Error (Max)        

  • I²C compatible interface
  • Isolation friendly for board to board communication
  • I²C compatible isolation translates -48V reference to ground referenced signals

 


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Schematic/Block Diagram

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Design Files

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Bill of Materials (BOM)

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA226  36V, Bi-Directional, High Accuracy, Low-/High-Side, I2C Out Current/Power Monitor w/Alert  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
ISO1541  2.5 kVrms Isolated Unidirectional Clock, Bidirectional I2C Isolators  Isolation  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA226 Download Download
ISO1541 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 975 28 Sep 2017 17
Design files (4)
Title Abstract Type Size (KB) Date Views
ZIP 833 23 Sep 2014 2
ZIP 1053 23 Sep 2014 2
PDF 253 23 Sep 2014 1 1
PDF 120 23 Sep 2014 9
Related Tools & Software

Software (1)



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