Three-phase residential metering is becoming increasingly common, particularly to address higher residential energy demand in developing economies. The 71M6523 residential-metering SoC delivers an anti-tamper neutral-current-measurement accuracy of 0.4%, allowing the detection of smaller amounts of energy theft and surpassing alternative solutions. Its single-converter technology and innovative SoC approach also eliminate the need to isolate individual phases using multiple regulators and isolation devices, speeding development time, improving meter reliability and performance, and reducing overall system cost by as much as 40%. With this solution, energy-measurement accuracy is enhanced, MTBF is increased, and both EMI susceptibility and power consumption are dramatically reduced. The chip also offers advanced power-management and tamper-detection features. Battery-back-up-mode functionality is also included, allowing measurements to be displayed and updated; in addition, there is a push-button wake-up from sleep mode, plus communications I/O.The flexibility of this solution should mean that metering customers can quickly customise their products to meet varying utility requirements all over the globe.
