Microchip Technology (Chandler, AZ) introduced the MCP39F511 single-phase power monitoring IC designed for real-time measurement of AC power. It is designed for use in high-performance commercial and industrial products such as lighting and heating systems, smart plugs, power meters, and AC/DC power supplies. To address industry requirements for better accuracy across current loads, additional power calculations, and event monitoring of various power conditions, the IC provides popular standard power calculations combined with advanced features. The import and export of active energy accumulation, four-quadrant reactive energy accumulation, zero-crossing detection, and dedicated PWM output have been integrated on-chip, along with the ability to measure active, reactive, and apparent power; RMS current and RMS voltage; line frequency; and power factor.
The device features 512 bytes of EEPROM, allowing operating-condition storage. It also includes two 24-bit delta-sigma ADCs with 94.5 dB of SINAD performance, a 16-bit calculation engine, and a flexible two-wire interface. A low-drift voltage reference, in addition to an internal oscillator, is integrated.
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