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Monitoring, Re-configuring and Re-tuning with Designer GUI
14.2 Monitoring with GUI
The page shows three variables in monitoring:
• V
OUT
– PFC output bulk voltage.
• OV Fault – PFC output bulk voltage over voltage fault threshold.
• Freq – switching frequency in normal operation.
Among three monitoring variables, we can see V
OUT
and OV Fault can be accessed by write to change
them to a different value into the firmware. However, when attempting to do so, make sure to understand
the design of all aspects to avoid any possible damage. As a warning to help avoid damage, if one wants
to modify “Vout” or “OV Fault” to a different value, the recommendation is 375 V to 395 V for V
OUT
, and not
exceeding 430 V for OV Fault. Also, logically, V
OUT
has to be smaller than OV Fault.
One may modify them to other values but before doing that, fully understanding the design is needed to
find out any other parameters needed to change accordingly such that not over stress the components in
use or inducing any stability concerns.
49
SLUU885B–March 2012–Revised July 2012 Digitally Controlled Single-Phase PFC Pre-Regulator
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Copyright © 2012, Texas Instruments Incorporated
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