Z8F2480 Datasheet, PDF (1/24 Pages) Zilog, Inc. – Load current up to 3 amps

Reference Design
Z8F2480 Power Monitor with
eZ80F91 Webserver
RD002702-0814
Overview
This reference design integrates a Z8F2480-based AC power monitor with Zilog’s
eZ80F91 Webserver Module to showcase the capability of an optically-isolated Z8F2480
MCU-based power monitor to measure AC input voltage, AC load current, voltage/current
phase shift, the power factor of the load, and to communicate via a standard Ethernet inter-
face and webserver.
The Z8F2480 MCU and the eZ80F91 Webserver Module are connected for easy mount-
ing. The load is powered via a single-phase AC line with voltage in the range of 90 V to
240 V RMS at 50 Hz or 60 Hz. The Z8F2480 MCU-based power board provides current to
a power load and provides optically-isolated I²C signals to communicate with the
eZ80F91 Module.
This reference design can be used as a basis for developing systems that can control differ-
ent power installations, including motors and lighting ballasts.
Note: The source code file associated with this reference design, RD0027-SC01.zip, is available
free for download from the Zilog website. This source code has been tested with version
5.2.0 of ZDSII for Z8 Encore! XP MCUs. Subsequent releases of ZDSII may require you
to modify the code supplied with this application note.
Features
This reference design features the following elements:
• 90–240V AC RMS input voltage range
• Load current up to 3amps
• Less than 5mA average current consumed from an AC line in either monitoring or
standby modes
• 3750V isolation voltage between the AC line and the eZ80F91 MCU
Potential Applications
This reference design can be used to develop a number of applications; the brief list below
offers two ideas.
• Remote-operated commercial or architectural lighting monitors
• Remote-operated AC motors or other devices
RD002702-0814
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