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Microchip Releases New Single Phase Power Monitoring IC


The MCP39F511 Measures Active, Reactive and Apparent Power, together with RMS Current, Voltage, Frequency and Power Factor


Microchip has recently added a new member to its power-monitoring IC portfolio, the MCP39F511. This highly integrated and accurate single-phase power-monitoring IC, designed for the real-time measurement of AC power, combines the most popular power calculations with unique advanced features, making it ideal for use in high-performance commercial and industrial products such as lighting and heating systems, smart plugs, power meters and AC/DC power supplies.

Click for Larger Image - Microchip MCP39F511 Power Monitoring IC “The MCP39F511 power-monitoring IC is an ideal complement to Microchip's successful energy measurement portfolio,” said Bryan J. Liddiard, marketing vice president of Microchip's Analog and Interface Products Division. “We listened to our customers' feedback and added the most requested features to better support engineers in their next generation of designs, including power-hungry applications such as data centers and advanced applications such as smart energy and the growing Internet of Things.”

To address industry requirements for better accuracy across current loads, additional power calculations, and event monitoring of various power conditions, the MCP39F511 power-monitoring IC provides all of the popular standard power calculations combined with advanced features. The import and export of active energy accumulation, four-quadrant reactive energy accumulation, zero-crossing detection and dedicated PWM output have now been integrated on-chip, along with the ability to measure active, reactive and apparent power, RMS current and RMS voltage, line frequency, and power factor.

Click for Larger Image - Microchip MCP39F511 Power Monitoring IC Block Diagram Allowing for more accurate power measurements, which is critical to higher-performance designs, this new device is capable of just 0.1% error across a wide 4000:1 dynamic range. Additionally, its 512 bytes of EEPROM allow operating-condition storage. The MCP39F511 also includes two 24-bit delta-sigma ADCs with 94.5 dB of SINAD performance, a 16-bit calculation engine, and a flexible two-wire interface. A low-drift voltage reference, in addition to an internal oscillator, is integrated to reduce implementation costs. This unique combination of features and performance allows designers to add highly accurate power-monitoring functions to their end applications with minimal firmware development, speeding development time.

Features of the MCP39F511 Power Monitoring IC

  • Power Monitoring Accuracy capable of 0.1% error across 4000:1 dynamic range
  • Built-In Calculations:
    • Active, Reactive, Apparent Power
    • Active and Reactive Energy Accumulation
    • True RMS Current, RMS Voltage
    • Line Frequency, Power Factor
  • Dedicated Zero Crossing Detection (ZCD) Pin
  • Dedicated PWM Output Pin
  • Automatic Event Pin Control through Fast Voltage Surge Detection
  • Fast Calibration Routines
  • 2-wire UART: Baud Rate up to 115.2kbps
  • 512 bytes User-accessible EEPROM through page read/write commands
  • Low-Drift Internal Voltage Reference: 10 ppm/°C typical
  • 28-lead 5x5 QFN package
  • Extended Temperature Range -40°C to +125°C
  • AEC-Q100 qualified

More information on the MCP39F511 Power Monitoring IC can be found on the Microchip website at Microchip MCP39F511 product page

Note: The Microchip name and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the U.S.A and other countries. All other trademarks mentioned herein are the property of their respective companies.


The Microchip website address is www.microchip.com
[Reprinted with kind permission from Microchip Corporation - Release Date, 21st April, 2015]