There are many different solutions on the market for 1-phase power meters to accommodate the customers' varying ranges of design requirements. To ease the design burden and provide flexibility, Renesas has developed an export power meter for the high-end market using an MCU to avoid the limitations of using system-on-chips (SoCs). This design encompasses the full solution including the MCU, a high-speed photocoupler, AC/DC, power device, and memory.

System Benefits​:

  • Compact design based on 72kHz integrated 900V BJT for 18W power supplies, no optocoupler, accurate voltage cross-regulation, compact AC/DC power supplies for smart electricity meters
  • MCU-based design adds flexibility and expanded memory, DLMS supported
  • Easy security/authentication in addition to using NFC connectivity




  • Smart electricity meters

Winning Combinations Interactive Diagram

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4:3 ratio Sheet.1 Sheet.2 Sheet.3 Sheet.4 CN204 cn204 CN204 Sheet.16 Sheet.17 Sheet.18 Sheet.19 Sheet.20 Darlington.131 Sheet.22 Sheet.23 Sheet.24 Sheet.25 Sheet.26 Darlington.131 Sheet.135 Sheet.91 Sheet.92 Sheet.93 Sheet.94 Sheet.95 Darlington.131 Sheet.109 Sheet.110 Sheet.111 Sheet.112 Sheet.113 Darlington.131 Sheet.115 Sheet.116 Sheet.117 Sheet.118 Sheet.119 Darlington.131 Sheet.121 Sheet.122 Sheet.123 Sheet.124 Sheet.125 Darlington.131 Resistor Resistor.166 Non-Electric Cap Sheet.169 Sheet.170 Sheet.171 Sheet.172 Sheet.173 Inductor Coreless (Air conductor) Sheet.175 Sheet.176 Sheet.177 Sheet.178 Sheet.179 Sheet.180 Sheet.181 Sheet.182 Sheet.183 Chassis Ground Sheet.185 Sheet.186 Resistor.187 Resistor.188 Load Load Load Op Amp Op Amp Op Amp Buck Buck Buck Line.841 Inductor Air Core.212 Sheet.195 Sheet.196 Sheet.197 Sheet.198 Sheet.199 Sheet.200 Sheet.201 Sheet.202 Sheet.203 Line.29 Inductor Coreless (Air conductor).205 Sheet.206 Sheet.207 Sheet.208 Sheet.209 Sheet.210 Sheet.211 Sheet.212 Sheet.213 Sheet.214 Inductor Coreless (Air conductor).215 Sheet.216 Sheet.217 Sheet.218 Sheet.219 Sheet.220 Sheet.221 Sheet.222 Sheet.223 Sheet.224 Signal Ground Sheet.226 Sheet.227 Sheet.228 Sheet.229 Sheet.230 Non-Electric Cap.231 Sheet.232 Sheet.233 Sheet.234 Sheet.235 Sheet.236 Sheet.237 Sheet.238 Sheet.239 Sheet.240 Sheet.241 Darlington.131 Sheet.243 Sheet.244 Sheet.245 Sheet.246 Sheet.247 Darlington.131 Chassis Ground.255 Sheet.256 Sheet.257 Ground (earth) Sheet.260 Sheet.261 Sheet.262 Sheet.263 LCD Segment Sheet.265 Sheet.266 Sheet.267 Sheet.268 Sheet.269 Sheet.270 Sheet.271 Sheet.272 Sheet.273 Sheet.274 Sheet.275 Sheet.276 Sheet.277 Sheet.278 Sheet.279 Sheet.280 Sheet.281 Sheet.282 Sheet.283 Sheet.284 Sheet.285 Sheet.286 Sheet.287 Sheet.288 Sheet.289 Sheet.290 Sheet.291 Sheet.292 Sheet.293 Sheet.294 ON ON Sheet.295 OFF OFF Sheet.296 Sheet.297 Sheet.298 Sheet.299 Sheet.300 Sheet.301 Sheet.302 Sheet.304 Sheet.305 Sheet.306 Connector Line Sheet.9 Sheet.329 Sheet.331 Sheet.333 Sheet.334 Sheet.335 Sheet.336 Connector Line.337 Connector Line.338 Connector Line.339 Connector Line.340 Connector Line.341 Connector Line.342 Connector Line.343 Connector 1 Connector Line.347 Connector Line.348 Connector Line.349 Connector Line.351 Connector 1.352 Connector Line.353 Sheet.355 Connector 1.356 Connector Line.357 Sheet.358 Connector Line.359 Connector Line.360 Connector Line.361 Connector 1.362 Connector Line.363 Connector Line.364 Connector Line.365 Connector 1.366 Connector 1.367 Connector 1.368 Connector 1.369 Connector 1.370 Connector Line.371 Connector Line.372 Connector 1.373 Connector Line.374 Connector 1.375 Resistor.376 Resistor.377 Connector Line.379 Connector 1.380 Connector Line.382 Connector 1.383 Connector Line.384 Connector Line.385 Connector Line.390 Connector Line.391 Non-Electric Cap.393 Sheet.394 Sheet.395 Sheet.396 Sheet.397 Sheet.398 Connector 1.399 Connector Line.400 Connector 1.401 Connector Line.402 Connector 1.403 Connector Line.404 Connector Line.405 Connector 1.406 Connector 1.407 Connector Line.408 Resistor.412 Resistor.413 Connector 1.414 Chassis Ground.415 Sheet.416 Sheet.417 Connector Line.419 Connector Arrow Connector Arrow.424 Connector Line.426 Connector Line.427 Connector 1.428 AC/DC AC/DC AC/DC Connector double arrow.430 Connector Line.433 Connector Line.435 Connector Line.436 Connector 1.437 Connector double arrow.438 Connector double arrow Connector double arrow.440 Connector Line.442 Connector Line.446 Connector Line.449 Connector Line.450 Connector Line.451 Connector Line.452 Connector 1.453 Connector Arrow.461 Connector Line.471 EEPROM EEPROM EEPROM Flash Flash Flash NFC NFC NFC Photocoupler Photocoupler Photocoupler RS-485 RS-485 RS-485 P P P P P P N N N 12V/1.5A 12V/1.5A 12V/1.5A 5V 5V 5V iGND iGND iGND 3.3V / 0.5A 3.3V/0.5A 3.3V/0.5A Communication Lines 1 2 2 2 Sheet.484 Communication Lines 1.485 2 2 2 Sheet.487 Sheet.491 Button Button Button LCD LCD LCD Connector Line.494 Connector 1.495 Connector 1.496 Connector 1.497 Connector 1.498 5V 5V 5V RS485 RS-485 RS-485 5V 5V 5V 3.3V 3.3V 3.3V To PLC To PLC To PLC AC Power Source Alternating Current Sheet.510 MCU MCU MCU MCU 24bit DSADC 24bit DSADC 24bitDSADC SAR ADC SAR ADC SARADC Vref Vref Vref UART UART UART LCDC LCDC LCDC GPIO GPIO GPIO I2C I2C I2C SPI SPI SPI
Exiting Interactive Block Diagram