Green Three-Phase Smart Energy Meter

Renesas’ green smart meters reference design helps to improve awareness of energy consumption while using very little power

Image of Renesas' Green Three-Phase Smart Energy MeterRenesas’ winning combination reference design for green three-phase smart energy meters is an efficient way to monitor energy consumption. This reference design helps with the growing demand for power and energy that local utilities and consumers require. 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 allows users to view information about their power consumption via remote data acquisition and transfer.

Features
  • Magnetic tamper-proof to protect data
  • High voltage operation
  • 1200 V inbuilt switch provides flexibility to make a robust and low-cost system
  • ISL91107 buck-boost regulator
    • High-efficiency buck-boost regulator with 3.6 A switches
  • RAA214401 linear regulator (LDO)
    • 150 mA wide input range ultra-low quiescent current linear regulator
  • RL78/I1B microcontroller
    • 16-bit low power MCU with 24-bit delta-sigma A/D converter
  • Supercapacitor for a last gasp power source
  • Remote data acquisition and transfer
  • RTC backup and high accuracy oscillator
  • PS2514L-1 photocoupler
    • High-speed switching/high isolation voltage photocoupler
  • iW1821 PWM controller
    • 1200 V AccuSwitch™ AC/DC digital primary-side converter for three-phase industrial applications up to 12 W
  • ISL8485 RS-485/RS-422 serial interface
    • 5 V, half-duplex, 5 Mbps, RS-485/RS-422 transceiver
Applications
  • Three-phase energy meters

ISL91107 Buck-Boost Regulator

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC REG BCK BST ADJ 2A 15WLCSPISL91107IIAZ-T7AIC REG BCK BST ADJ 2A 15WLCSP0View Details

RAA214401 Linear Regulator

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
40V LOW IQ LDO, 3L SOT-23, T&R 3RAA2144014GP3#JA040V LOW IQ LDO, 3L SOT-23, T&R 30View Details

RL78/I1B Microcontroller

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC MCU 16BIT 128KB FLASH 80LFQFPR5F10MMGDFB#30IC MCU 16BIT 128KB FLASH 80LFQFP347 - ImmediateView Details

PS2514L-1 Photocoupler

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
OPTOISOLATOR 5KV DARL 4SMDPS2514L-1Y-AOPTOISOLATOR 5KV DARL 4SMD3563 - ImmediateView Details

ISL8485 PWM Controller

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC TRANSCEIVER HALF 1/1 8SOICISL8485CBZIC TRANSCEIVER HALF 1/1 8SOIC0View Details
Published: 2021-09-28