|
Maxim 公司的78M6631是三相電源功率測量和監測系統級芯片(SoC),集成了10MHz 8051兼容的MPU核,22位Delta-Sigma轉換器和32位計算引擎(CE),支持三角型和Y型三相連接.2000:1電流范圍內和整個(gè)溫度內瓦特精度小于0.5%,超過(guò)IEC 62053/ANSI C12.20標準,基準電壓溫漂小于40 ppm/℃,具有高速SPI通信,主要用在建筑物自動(dòng)化,數據中心,通信,存儲電源和電源分配單元,馬達運行和風(fēng)細雨太陽(yáng)能逆變器.本文介紹了78M6631主要特性, 78M6631評估板主要特性以及在三相四線(xiàn)和三相三線(xiàn)連接的應用框圖,評估板電路圖和材料清單,PCB布局圖. 78M6631:3-Phase Power Measurement and Monitoring SoC The 78M6631 is a highly integrated, 3-phase power measurement and monitoring SoC with a 10MHz, 8051-compatible MPU core and Teridian’s Single Converter Technology® containing a 22-bit delta-sigma 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 integrated MPU core and 128KB of flash memory provide a flexible means of configuration, post-processing, data formatting, interfacing to host processor through a UART or SPI™ interface, or using DIO pins for LEDs or relay control. All firmware is preloaded during manufacturing test. 78M6631主要特性: < 0.5% Watt Accuracy Over 2000:1 Current Range and Over Temperature Exceeds IEC 62053/ANSI C12.20 Standards Voltage Reference < 40 ppm/℃ 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應用: Building Automation Data Center, Telecom, Storage Power Supplies, and Power Distribution Units Motor Health Solar Inverters 78M6631評估板 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 device 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 pre-programmed 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). 
圖1.78M6631評估板外形圖 The 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
圖2.78M6631評估板應用框圖(三相四線(xiàn)連接)
圖3.78M6631評估板應用框圖(三相三線(xiàn)連接)
圖4.78M6631評估板電路圖(1)
圖5.78M6631評估板電路圖(2)
圖6.78M6631評估板電路圖(3) 78M6631評估板材料清單:
圖7.78M6631評估板PCB布局圖:左為頂層,右為底層 詳情請見(jiàn): 
AN5263[1].pdf
(1.32 MB)
|
