原标题：Maxim 78M6613单相交流电能测量解决方案

　　Maxim 公司的78M6613是高度集成的单相交流电能测量器件,在2000:1电流范围和温度范围内精度优于0.5% Wh,基准电压温度系数小于40ppm/℃,四个传感器输入,带独立32位计算引擎(CE)的22位Delta-Sigma ADC,采用8位MPU(80515),带安全保密的32KB闪存,UART接口和多达10个通用5V I/O引脚,主要用在建筑物自动化,家用电器,数据中心,通信以及存储电源,家庭自动化和室内外照明.本文介绍了78M6613主要特性, 功能方框图, 应用框图以及78M6613评估板框图,电路图,材料清单和PCB元件布局图.

　　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 32KB 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.

　　78M6613主要特性:

　　• < 0.5% Wh Accuracy Over Wide 2000:1 Current Range and Over Temperature

　　• Voltage Reference < 40ppm/℃

　　• 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 x 5mm)

　　• Complete Application Firmware Provides: o 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

　　78M6613应用:

　　Building Automation

　　Consumer Appliances

　　Data Center, Telecom, and Storage Power Supplies

　　Home Automation

　　Indoor/Outdoor Lighting

　　图1.78M6613功能方框图

　　图2.78M6613 AFE方框图

　　图3.78M6613应用框图

　　78M6613评估板

　　The Teridian Semiconductor Corporation (TSC) 78M6613 Evaluation Board is an electrical measurement unit for performing measurements of up to two single-phase AC loads. It incorporates the TSC 78M6613 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 78M6613 energy-meter controller chip for measurement accuracy and overall system use.

　　The board is preprogrammed with Firmware Demo Code (file name 6613_OMU_S2+2_URT_V1_1x.hex) in the flash memory of the 78M6613 IC that allows evaluation of the IC’s capabilities.

　　The 78M6613 energy-measurement data and status is read back over the serial UART interface using a text-based command line interface (CLI) command set. Easy manual operation is performed using HyperTerminal.Refer to the applicable 6613_OMU_S2+2_URT_V1_1x Firmware Description Document for invocation usage of the CLI commands.

　　The 78M6613 Evaluation Board Demo Kit includes:

　　• 78M6613 Evaluation Board

　　• USB Cable Assembly USB A-B 28/24 1.8M (Tyco/Amp 1487588-3)

　　• CD with documentation

　　图4.78M6613评估板连接图

　　图5.78M6613评估板应用框图

　　78M6613评估板材料清单(BOM):