Reference Designs
-48V Telecom Current/Voltage/Power Sense with Isolation
Texas Instruments
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 -48VHigh Accuracy:- 10µV Offset (Max)- 0.1% Gain Error (Max) I²C compatible interfaceIsolation friendly for board to board communicationI²C compatible isolation translates -48V reference to ground referenced signals
Applications
- Small cell base station
- Aircraft cockpit display
- Interconnect/distribution box
- Intra-DC interconnect (metro)
- Inter-DC interconnect (long-haul
- submarine)
- Outdoor backhaul unit
- Merchant telecom rectifiers
- Proximity switch
- Telecom monitor unit
- Circuit breaker (ACB
- MCCB
- VCB)
Product Categories
- Amplifiers
End Equipment Reference Diagrams
Application Area
End Equipment
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