Magnetic Tamper Detection Using Low-Power Hall Effect Sensors Reference Design TIDA-00839 (ACTIVE)

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Key Document

Description

Magnetic tampering can paralyze any transformer in an energy measurement system, which may potentially lead to the system being unable to be powered properly or unable to correctly register the energy consumed by a load.  This design implements a Class 0.2  three-phase energy measurement system that detects magnetic tampering using hall sensors.  Magnetic tamper detection is enabled when running from both main and backup power sources.  Methods are used to reduce the current consumption of the hall sensors to increase battery life when running from the backup power source.

Features
  • Bop =±6.9 mT, Sensor Brp =±3.5mT
  • Support for Backup Power Sources
  • Software Power Duty-Cycling Reduces Current Consumption per Sensor to < 2 µA
  • Three-Phase Energy Measurement Exceeds Class 0.2 Accuracy Requirements from ANSI and IEC
  • TI Energy Library Firmware Calculates All Energy Measurement Parameters Including Active and Reactive Power; Active and Reactive Energy; Root Mean Square (RMS) Current and Voltage; Power Factor; and Line Frequency

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TI Devices (9)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
DRV5032  Ultra-Low Power 1.65V to 5.5V Hall Effect Switch  Magnetic sensors  Sample & Buy View Design Kits & Evaluation Modules
DRV5033  2.5V to 38V Hall Effect Omnipolar Switch  Magnetic sensors  Sample & Buy View Design Kits & Evaluation Modules
ISO7320C  Robust EMC, Low Power, Dual-Channel 2/0 Digital Isolator, Fail-Safe High  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7321C  Robust EMC, Low Power, Dual-Channel 1/1 Digital Isolator, Fail-safe High  Isolation  Sample & Buy View Design Kits & Evaluation Modules
MSP430F67791A  Polyphase Metering SoC with 7 Sigma-Delta ADCs, LCD, Real-Time Clock, 512KB Flash, 32KB RAM  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPS54060  3.5V to 60V Input, 0.5A Step-Down Converter with Eco-Mode  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS709  150-mA 30-V ultra-low-IQ wide-input low-dropout (LDO) regulator with reverse current protection  Power management  Sample & Buy View Design Kits & Evaluation Modules
TRS3232  3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver With +/-15-kV ESD Protection  Interface  Sample & Buy Not Available
UCC28910  700V Flyback Switcher with Constant-Voltage Constant-Current and Primary-side Control  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DRV5032 Download Download
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DRV5033 Download Download
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ISO7320C Download Download
ISO7321C Download Download
MSP430F67791A Download
TPS54060 Download Download
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TPS709 Download
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TRS3232 Download -
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UCC28910 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 3284 07 Jan 2015
Design files (5)
Title Type Size (KB) Date
PDF 210 09 May 2017
ZIP 331 04 Dec 2015
ZIP 413 04 Dec 2015
PDF 277 04 Dec 2015
PDF 62 04 Dec 2015
Related Tools & Software

Reference Designs  ( 3 )

Software (1)



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