Maxim 公司的78M6613是高度集成的單相交流電能測量器件,在2000:1電流范圍和溫度范圍內(nèi)精度優(yōu)于0.5% Wh,基準(zhǔn)電壓溫度系數(shù)小于40ppm/℃,四個傳感器輸入,帶獨立32位計算引擎(CE)的22位Delta-Sigma ADC,采用8位MPU(80515),帶安全保密的32KB閃存,UART接口和多達(dá)10個通用5V I/O引腳,主要用在建筑物自動化,家用電器,數(shù)據(jù)中心,通信以及存儲電源,家庭自動化和室內(nèi)外照明.本文介紹了78M6613主要特性, 功能方框圖, 應(yīng)用框圖以及78M6613評估板框圖,電路圖,材料清單和PCB元件布局圖.
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應(yīng)用:
Building Automation
Consumer Appliances
Data Center, Telecom, and Storage Power Supplies
Home Automation
Indoor/Outdoor Lighting
圖1.78M6613功能方框圖
圖2.78M6613 AFE方框圖
圖3.78M6613應(yīng)用框圖
78M6613評估板
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
圖4.78M6613評估板連接圖
圖5.78M6613評估板應(yīng)用框圖
圖6.78M6613評估板電路圖(1)
圖7.78M6613評估板電路圖(1)
78M6613評估板材料清單(BOM):
圖8.78M6613評估板PCB布局圖(頂視圖) 圖9.78M6613評估板PCB布局圖(底視圖) |
