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Green 3-Phase Smart Energy Meter

With a growing demand for power and energy, local utilities and consumers are requiring a more efficient way to monitor the energy consumed. Green smart meters help to improve awareness of this energy consumption while using very little power themselves. This solution provides the components for a low-cost, smart and secure green meter. This tamper proof and connected system gives users the ability to view information about their power consumption via remote data acquisition and transfer.

System Benefits

  • Magnetic tamper proof to protect data
  • High voltage operation
  • Supercapacitor for a last gasp power source
  • Remote data acquisition and transfer
  • 1200V inbuilt switch provides flexibility to make a robust and low-cost system

Target Applications

  • 3-phase energy meters
Green 3-Phase Smart Energy MeterRenesas Dialog Diagram Legend
Buck-Boost Regulator      
ISL91107 High-Efficiency Buck-Boost Regulator with 3.6A Switches Datasheet Buy/Sample


Linear Regulator (LDO)      
RAA214401 150mA Wide Input Range Ultra-Low Quiescent Current Linear Regulator Datasheet Buy/Sample


RL78/I1B 16-Bit Low Power MCU with 24-bit ΔΣ A/D Converter, RTC Backup and High-Accuracy Oscillator User's Manual Buy/Sample


PS2514L-1 High-speed Switching/High Isolation Voltage Photocoupler Series Datasheet Buy/Sample


PWM Controller      
iW1821 1200V AccuSwitch™ AC/DC Digital Primary-Side Converter for Three-Phase Industrial Applications up to 12W Product Summary Buy/Sample


RS-485/RS-422 Serial Interface      
ISL8485 5V, Half Duplex, 5Mbps, RS-485/RS-422 Transceiver Datasheet Buy/Sample