78M6631

3-Phase Power Measurement and Monitoring SoC

Designed Specifically for Energy Measurement and Power Quality Monitoring for 3-Phase Point-of-Load Applications

Data Sheet (Rev. 2)
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Part Details

  • < 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
78M6631
3-Phase Power Measurement and Monitoring SoC
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

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Hardware Ecosystem

Parts Product Life Cycle Description
Product 3
78M6612
Single-Phase, Dual-Outlet Power and Energy Measurement IC
78M6613
Single-Phase AC Power-Measurement IC
78M6618
Octal Power and Energy Measurement IC
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Evaluation Kits

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78M6631-EVM-1

Evaluation Board for the 78M6631

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Features and Benefits

78M6631 Evaluation Board Demo Kit Includes
  • 78M6631 Evaluation Board
  • USB Cable Assembly USB A-B 28/24 1.8M (Tyco/Amp 1487588-3)
  • In-Circuit Emulator (ICE) Adaptor
  • Three CTs
  • CD with documentation

Product Details

The Teridian™ 78M6631 Evaluation Board is an electrical measurement unit for performing measurements on a 3-phase AC system. It incorporates the 78M6631 power and energy measurement IC and connects to a PC through a USB cable such as the one provided in the demo kit. The Evaluation Board demonstrates the capability of the 78M6631 energy meter controller chip for measurement accuracy and overall system use.

The on-board 78M6631 is preprogrammed with the firmware demo code. The 78M6631 energy measurement data and status is read back over the serial UART interface using a text-based CLI command set (easy manual operation is performed using HyperTerminal) and through the serial peripheral interface (SPI). Refer to the 78M6631 Firmware Description Document for details about the firmware and the use of the CLI commands.

Applications

  • Building Automation
  • Data Center, Telecom, Storage Power Supplies, and Power Distribution Units
  • Motor Health
  • Solar Inverters
78M6631-EVM-1
Evaluation Board for the 78M6631
78M6631: Evaluation Board

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