3-Phase Power Measurement and Monitoring SoC

The Teridian™ 78M6631 is a highly integrated 3-phase power measurement and monitoring system-on-chip (SoC), with a 10MHz 8051-compatible MPU core and Single Converter Technology® containing a 22-bit deltasigma converter and 32-bit compute engine (CE). The 78M6631 has been designed specifically for a wide variety of applications requiring 3-phase power and quality measurements. It supports both Delta and Wye configurations.

At the measurement interface, the device provides six analog inputs including three differential current and three voltage for interfacing to current and voltage sensors. The device provides better than 0.5% accuracy over a wide 2000:1 dynamic range.

The integrated MPU core and 128 KB of flash memory provide a flexible means of configuration, postprocessing, data formatting, interfacing to host processor via a UART or SPI interface, or using DIO pins for LEDs or relay control. Complete firmware is available from Maxim and can be loaded into the IC during manufacturing test.Applications

* Building Automation * Data Center, Telecom, Storage Power Supplies, and Power Distribution Units * Motor Health * Solar Inverters

* < 0.5% Watt Accuracy Over 2000:1 Current Range and Over Temperature

* Exceeds IEC 62053/ANSI C12.20 Standards

* Voltage Reference < 40 ppm/°C

* Six Analog Inputs Supporting 3-Phase Voltage and Current Measurement Inputs

* Pin- or Bi-Selectable Delta or Wye Configuration

* 22-Bit Delta-Sigma ADC with Independent 32-Bit Compute Engine (CE)

* 8-Bit MPU (80515), One Clock Cycle per Instruction with 4KB MPU XRAM

* 128KB Flash with Security

* 32kHz Time Base with Hardware Watchdog Timer

* UART, I²C, and High-Speed Slave SPI Host Interface Options

* 17 General-Purpose 5V Tolerant I/O Pins

* Packaged in a RoHS-Compliant (6/6) Lead-Free 56-Pin TQFN

* Application Firmware Includes (per Phase):

* True RMS Current and Voltage Calculations

* Active, Reactive, Apparent, Fundamental, and Harmonic Power Calculations

* Fundamental and Harmonic Current and Voltage Calculations

* Line Frequency and Power Factor Calculations

* Phase Compensation (±18° at 60Hz)

* Built-In Calibration Routines

* Programmable Alarm Thresholds

* Command Line (UART) Communications

* High-Speed SPI Communications