TIDA-00313
-48V Telecom Current/Voltage/Power Sense with Isolation
TIDA-00313
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
Communications equipment
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDU361A.PDF (975 K)
Reference design overview and verified performance test data
TIDRAN8.PDF (120 K)
Detailed schematic diagram for design layout and components
TIDRAN9.PDF (253 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRAO0.ZIP (1053 K)
Files used for 3D models or 2D drawings of IC components
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.
Current/voltage/power monitors
INA226 — 36V, 16-bit, ultra-precise i2c output current/voltage/power monitor w/alert
Data sheetI2C isolators
ISO1541 — 2.5-kVrms, isolated unidirectional clock, bidirectional I2C isolator
Data sheetStart development
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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