参数资料
型号: 71M6521FE-IMR/F
厂商: Maxim Integrated
文件页数: 48/107页
文件大小: 0K
描述: IC ENERGY METER 32K FLASH 68-QFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
系列: Single Converter Technology®
测量误差: 0.4%
电源电压: 3 V ~ 3.6 V
测量仪表类型: 单相,双相
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-VFQFN 裸露焊盘
供应商设备封装: 64-QFN(7.5x7.5)
包装: 带卷 (TR)

71M6521DE/DH/FE Data Sheet
FUNCTIONAL DESCRIPTION
Theory of Operation
The energy delivered by a power source into a load can be expressed as:
t
E = ∫ V ( t ) I ( t ) dt
0
Assuming phase angles are constant, the following formulae apply:
?
?
P = Real Energy [Wh] = V * A * cos φ * t
Q = Reactive Energy [VARh] = V * A * sin φ * t
?
S = Apparent Energy [VAh] =
P 2 + Q 2
For a practical meter, not only voltage and current amplitudes, but also phase angles and harmonic content may
change constantly. Thus, simple RMS measurements are inherently inaccurate. A modern solid-state electricity meter
IC such as the Teridian 71M6521DE/DH/FE functions by emulating the integral operation above, i.e. it processes
current and voltage samples through an ADC at a constant frequency. As long as the ADC resolution is high enough
and the sample frequency is beyond the harmonic range of interest, the current and voltage samples, multiplied with
the time period of sampling will yield an accurate quantity for the momentary energy. Summing up the momentary
energy quantities over time will result in accumulated energy.
500
400
300
200
100
0
0
5
10
15
20
-100
-200
-300
-400
Current [A]
Voltage [V]
Energy per Interval [Ws]
Accumulated Energy [Ws]
-500
Figure 15: Voltage. Current, Momentary and Accumulated Energy
Figure 15 shows the shapes of V(t), I(t), the momentary power and the accumulated power, resulting from 50
samples of the voltage and current signals over a period of 20ms. The application of 240VAC and 100A results in an
accumulation of 480Ws (= 0.133Wh) over the 20ms period, as indicated by the Accumulated Power curve.
The described sampling method works reliably, even in the presence of dynamic phase shift and harmonic distortion.
Page: 48 of 107
Rev 3
相关PDF资料
PDF描述
A7PPB-1506M CABLE D-SUB-AMM15B/AE15M/AMM15B
VI-BNP-EU-F2 CONVERTER MOD DC/DC 13.8V 200W
ADP194ACBZ-R7 IC POWER SWITCH HS LOGIC 4WLSCP
591D336X9016R2T15H CAP TANT 33UF 16V 10% 2824
71M6521FE-IGTR/F IC ENERGY METER 32K FLASH 64LQFP
相关代理商/技术参数
参数描述
71M6521-TGP1-68M 制造商:Maxim Integrated Products 功能描述:Programmer Accessories Gang Programmer Base w/6521 Socket Brd
71M6523-DB 功能描述:开发板和工具包 - 8051 71M6521D Demo Brd RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:C8051F960, Si7005 核心: 接口类型:USB 工作电源电压:
71M6523-IM 功能描述:计量片上系统 - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel
71M6523-IM/F 功能描述:计量片上系统 - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel
71M6523-IMR 功能描述:计量片上系统 - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel