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TIDA-00313

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

Design files

TIDA-00313

Design files

Overview

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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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.

download Design guide — TIDA-00313
TIDU361A.PDF (975 K)

Reference design overview and verified performance test data

download Schematic — TIDA-00313
TIDRAN8.PDF (120 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-00313
TIDRAN9.PDF (253 K)

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

download CAD/CAE symbol — TIDA-00313
TIDRAO0.ZIP (1053 K)

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

download Gerber file — TIDA-00313
TIDC638.ZIP (833 K)

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

Products

Includes TI products in the design and potential alternatives.

Digital power monitors

INA226 — 36V, 16-bit, ultra-precise i2c output current/voltage/power monitor w/alert

Data sheet: PDF | HTML
I2C isolators

ISO1541 — 2.5-kVrms, isolated unidirectional clock, bidirectional I2C isolator

Data sheet: PDF | HTML

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Software

Technical documentation

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Type Title Date
Design guide –48-V Telecom Current, Voltage, and Power Sense With Isolation Reference Design (Rev. A) Sep. 28, 2017

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