Single-Phase AC Power-Measurement IC

Industry's First SoC Energy Measurement Solution for AC-DC Power Supplies


The 78M6613 is a highly integrated IC for simplified implementation of single-phase AC power measurement into power supplies, smart appliances, and other applications with embedded AC load monitoring and control. It is packaged in a small, 5mm x 5mm, 32-pin QFN package for optimal space savings.

At the measurement interface, the device provides four analog inputs for interfacing to voltage and current sensors. Voltages from the sensors are fed to our Single Converter Technology® that uses a 22-bit delta-sigma ADC, independent 32-bit compute engine (CE), digital temperature compensation, and precision voltage references to provide better than 0.5% power measurement accuracy over a wide 2000:1 dynamic range.

The integrated MPU core and 32 KB of flash memory provides a flexible means of configuration, post-processing, data formatting, and interfacing to any host processor through the UART interface and/or DIO pins. Complete application firmware is available and can be preloaded into the IC during manufacturing test. Alternatively, a complete array of ICE, development tools, and programming libraries are available to allow customization for each application.

The 78M6613 PSU Firmware is a turnkey energy measurement solution optimized for use in AC power-supply units (PSUs). At the sensor interface, the 78M6613 with PSU Firmware supports one voltage sense input, one current sense input, and an optional input for an external thermistor voltage measurement. At the host interface, ready-to-use data is available over a low baud-rate serial interface for minimal cost of data isolation.

The 78M6613 HPL Firmware is a turnkey energy measurement solution optimized for use in AC high power load units (HPLs), also known as "split-phase." At the sensor interface, the 78M6613 with HPL Firmware supports two voltage sense inputs and two current sense inputs. At the host interface, ready-to-use data is available over a low baud-rate serial interface for minimal cost of data isolation.

Key Features

  • < 0.5% Wh Accuracy Over Wide 2000:1 Current Range and Over Temperature
  • Voltage Reference < 40ppm/°C
  • Four Sensor Inputs—V3P3A Referenced
  • 22-Bit Delta-Sigma ADC with Independent 32-Bit Compute Engine (CE)
  • 8-Bit MPU (80515), One Clock Cycle per Instruction with 2KB MPU XRAM
  • 32KB Flash with Security
  • Integrated In-Circuit Emulator (ICE) Interface for MPU Debug
  • 32kHz Time Base with Hardware Watchdog Timer
  • UART Interface and Up to 10 General-Purpose 5V Tolerant I/O Pins
  • Packaged in a RoHS-Compliant (6/6) Lead(Pb)-Free, 32-Pin QFN (5mm x5mm)
  • Complete Application Firmware Provides:
    • True RMS Calculations for Current, Voltage, Line Frequency, Real Power, Reactive Power, Apparent Power, and Power Factor
    • Accumulated Watt-Hours, Kilowatt-Hours
    • Intelligent Switch Control at Zero Crossings
    • Digital Temperature Compensation
    • Phase Compensation (±15°)
    • Quick Calibration Routines
    • 46-64Hz Line Frequency Range with Same Calibration


  • Building Automation
  • Consumer Appliances
  • Data Center, Telecom, and Storage Power Supplies
  • Home Automation
  • Indoor/Outdoor Lighting
Part Number SoC Type MCU Core VSUPPLY
Total Sensor Inputs Internal Flash
Internal RAM
Slave Host Interface(s) Package/Pins
78M6613  Programmable 80515 3.3 4 32 2 UART
See Data Sheet
See All Energy Measurement SoCs (11)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

78M6613-PSU-1: 78M6613 PSU Evaluation Kit
78M6613-EVM-1: EV Board for the 78M6613
78M6613-SP-1: 78M6613 HPL Evaluation Kit User Manual

Tools & Models

78M6613 PSU Software Development Kit
78M6613 HPL Software Development Kit


Related Resources

Type ID Title
Evaluation Board742578M6613-SP-1 78M6613 HPL Evaluation Kit User Manual
Evaluation Board724478M6613-EVM-1 EV Board for the 78M6613
Evaluation Board724378M6613-PSU-1 78M6613 PSU Evaluation Kit