TIDM-TWOPHASEMETER-I2040

Low-Cost Single/Dual-Phase Isolated Electricity Measurement Reference Design

TIDM-TWOPHASEMETER-I2040

Design files

Overview

The design implements a low-cost single- or dual-phase electricity measurement solution. The design separates a small metrology MCU from the host MCU, providing both protection from the AC mains and also isolation of the energy measurement function from corruption by other software. The small, low-cost metrology MCU achieves IEC/ANSI Class 1 accuracy and calculates active and reactive power and energy. This design is implemented using Current Transformer sensors for single and dual-phase measurement. It can also be easily modified for single-phase measurement with shunt resistor sensors.

Features
  • Low-cost single-/dual-phase electricity measurement with IEC/ANSI Class 1 accuracy
  • 4KV peak Isolation between metrology and host ensure Mains and the metrology subsystem are isolated from other subsystems
  • Small 28-pin TSSOP package of metrology MCU reduces board space and simplifies layout to minimize PCB complexity.
  • TI Energy Library firmware calculates all energy measurement parameters including active and reactive power and energy, RMS current and voltage, power factor, and line frequency
  • Low power consumption of metrology MCU reduces cost of power supply

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU482A.PDF (2915 K)

Reference design overview and verified performance test data

TIDRAY4.PDF (128 K)

Detailed schematic diagram for design layout and components

TIDRAY5.PDF (244 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRAY6.ZIP (257 K)

Files used for 3D models or 2D drawings of IC components

TIDC674.ZIP (243 K)

Design file that contains information on physical board layer of design PCB

TIDRAY7.ZIP (459 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS54013.5V to 42V Input, 0.5 A Step Down Converter

Data sheet document-pdfAcrobat PDF open-in-new HTML
Digital isolators

ISO7220ADual-channel, TTL, 2/0, 1-Mbps digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Digital isolators

ISO7221ADual-channel, TTL, 1/1, 1-Mbps digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430F663820 MHz MCU with 256KB Flash, 16KB SRAM, 12-bit ADC, 12-bit DAC, comparator, DMA, 160 seg LCD, USB

Data sheet document-pdfAcrobat PDF
MSP430 microcontrollers

MSP430I204116-MHz metering AFE with 4 24-bit sigma-delta ADCs, 2 16-bit timers, 32KB Flash, 2KB RAM

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development

Software

Support software

Low-Cost Two-Phase Electric Meter Software (Rev. B) – TIDC673B.ZIP (20902 K)

Technical documentation

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Type Title Date
* Design guide Low-Cost Single or Dual-Phase Isolated Electricity Measurement Reference Design (Rev. A) Jul. 20, 2016
Technical article A new feather in the cap – new MSP430 industrial series microcontrollers are here! Nov. 05, 2014

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