Power-monitoring IC for commercial and industrial designs

23-04-2015 | Microchip Technology | Power

Expanding its power-monitoring IC portfolio, Microchip has introduced the
MCP39F511, a highly-integrated and accurate single-phase power-monitoring
IC. The device is 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.

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

Allowing for more accurate power measurements, which is critical in
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
innovative 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.

The MCP39F511 is available now for sampling and volume production, in a
28-lead, 5mm x 5mm QFN package. The MCP39F511 is supported by Microchip's
MCP39F511 Power Monitor Demonstration Board (ADM00667).

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