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MCP39F511單相電源實時監測解決方案

文章來源：更新時間：2015/5/7 9:18:00

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Microchip公司的MCP39F511是高度集成單相電源實時監測集成電路,用于實時測量AC/DC電源,分布電源單元,消費類電子和工業應用的輸入電源.器件包括雙路delta-sigma ADC,16位計算引擎,EEPROM和靈活的2線接口,溫漂10 ppm/℃的基準電壓,動態范圍4000:1時的精度優于0.1%.本文介紹了MCP39F511主要特性,框圖, 單相兩線應用電路圖以及MCP39F511電源監測演示板主要特性,電路圖,材料清單和PCB設計圖.
The MCP39F511 is a highly integrated, complete single-phase power-monitoring IC designed for real-time measurement of input power for AC/DC power supplies, power distribution units, consumer and industrial applications. It includes dual-channel delta-sigma ADCs, a 16-bit calculation engine, EEPROM and a flexible 2-wire interface. An integrated low-drift voltage reference with 10 ppm/℃ in addition to 94.5 dB of SINAD performance on each measurement channel allows for better than 0.1% accurate designs across a 4000:1 dynamic range.

MCP39F511主要特性:
• Power Monitoring Accuracy Capable of 0.1% Error Across 4000:1 Dynamic Range
• Built-In Calculations on Fast 16-Bit Processing Core
- Active, Reactive, Apparent Power
- True RMS Current, RMS Voltage
- Line Frequency, Power Factor
• 64-bit Wide Import and Export Active Energy Accumulation Registers
• 64-bit Four Quadrant Reactive Energy Accumulation Registers
• Signed Active and Reactive Power Outputs
• Dedicated Zero Crossing Detection (ZCD) Pin Output with Less than 100 μS Latency
• Dedicated PWM Output Pin with Programmable Frequency and Duty Cycle
• Automatic Event Pin Control through Fast Voltage Surge Detection Less than 5ms Delay
• 24x Faster than Previous Version 115.2k Baud-Rate Two-Wire Serial Protocol using a 2-Wire Universal Asynchronous Receiver/Transmitter (UART)
• Eight Independent Registers for Minimum and Maximum Output Quantity Tracking
• Fast Calibration Routines and Simplified Command Protocol
• 512 Bytes User-Accessible EEPROM through Page Read/Write Commands
• Low-Drift Internal Voltage Reference, 10 ppm/℃ Typical
• 28-lead 5x5 QFN Package
• Extended Temperature Range -40℃ to +125℃
MCP39F511應用:
• Power Monitoring for Home Automation
• Industrial Lighting Power Monitoring
• Real-Time Measurement of Input Power for AC/DC Supplies
• Intelligent Power Distribution Units

圖1. MCP39F511功能框圖

圖2. MCP39F511單相兩線應用電路圖

MCP39F511電源監測演示板
The MCP39F511 Power Monitor Demonstration Board is a fully functional single-phase power and energy monitoring system. The system calculates and displays active power, reactive power, RMS current, RMS voltage, active energy (both import and export), and four quadrant reactive energy.
It connects easily through USB to the “MCP39F511 Power Monitor Utility Software” that offers automated control to allow you to easily experiment with all system configuration settings such as PWM output frequencies, zero crossing detection options, and event configurations, among many others.
The “MCP39F511 Power Monitor Utility” software can also be used to and be used to create custom calibration setups. For most accuracy requirements, only a single-point calibration is needed. The energy meter software offers an automated calibration process that can be used to quickly calibrate energy meters and allow you to experiment with different calibration procedures.

MCP39F511電源監測演示板主要特性:
Displays Active, Reactive, Apparent Power, RMS Current, RMS Voltage, Line Frequency, Import/Export Active Energy and 4 Quadrant Reactive Energy
Event notifications including Over Current, Over Power, Voltage Sag and Voltage Surge
Device configuration through PC software, including Event Notifications, Calibration, EEPROM read/writes, PWM Control and Energy Accumulation Start/Reset
Direct connect to 90V-240VAC operation
15A maximum recommended load

圖3. MCP39F511電源監測演示板外形圖

MCP39F511電源監測演示板(ADM00667)包括:
• MCP39F511 Power Monitor Demonstration Board (ADM00667)
• AC Line Cable
• IEC to Female AC Load Cable
• Mini-USB Cable
• Important Information Sheet