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TIDM-TWOPHASEMETER-I2040

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

Design files

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
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

download Design guide — TIDM-TWOPHASEMETER-I2040
TIDU482A.PDF (2915 K)

Reference design overview and verified performance test data

download Schematic — TIDM-TWOPHASEMETER-I2040
TIDRAY4.PDF (128 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDM-TWOPHASEMETER-I2040
TIDRAY5.PDF (244 K)

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

download CAD/CAE symbol — TIDM-TWOPHASEMETER-I2040
TIDRAY6.ZIP (257 K)

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

download Gerber file — TIDM-TWOPHASEMETER-I2040
TIDC674.ZIP (243 K)

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

download PCB layout — TIDM-TWOPHASEMETER-I2040
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)

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Data sheet: PDF | HTML
Digital isolators

ISO7220A — Dual-channel, TTL, 2/0, 1-Mbps digital isolator

Data sheet: PDF | HTML
Digital isolators

ISO7221A — Dual-channel, TTL, 1/1, 1-Mbps digital isolator

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F6638 — 20 MHz MCU with 256KB Flash, 16KB SRAM, 12-bit ADC, 12-bit DAC, comparator, DMA, 160 seg LCD, USB

Data sheet: PDF
MSP430 microcontrollers

MSP430I2041 — 16-MHz metering AFE with 4 24-bit sigma-delta ADCs, 2 16-bit timers, 32KB Flash, 2KB RAM

Data sheet: PDF | HTML

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Software

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

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